Metadata: Identification Information: Dataset Identifier: gov.noaa.class:J2-XGDR Citation: Citation Information: Originator: DOC/NOAA/NESDIS/OSDPD > Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce Originator: EUMETSAT > European Meteorological Satellite Organisation Originator: FR/CNES > Centre National d'Etudes Spatiales, France origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: FR/CNES > Centre National d'Etudes Spatiales, France Contact Address: Address Type: Mailing Address: Centre national d'?tudes spatiales 2 place Maurice Quentin City: PARIS CEDEX 01 State or Province: N/A Postal Code: 75 039 Country: FRANCE Contact Voice Telephone: 33 (0)1.44.76.75.00 Contact Facsimile Telephone: 33 (0)1.44.76.76.76 Contact Instructions: For information, go to: http://www.cnes.fr/web/CNES-en/475-contact.php origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: EUMETSAT > European Meteorological Satellite Organisation Contact Address: Address Type: Mailing and Physical Address: EUMETSAT Eumetsat Allee 1 City: Darmstadt State or Province: N/A Postal Code: D-64295 Country: Germany Contact Voice Telephone: +49(0)6151-807 7 Contact Facsimile Telephone: +49(0)6151-807 555 Contact Instructions: For information, go to: http://www.eumetsat.int/Home/Main/AboutEUMETSAT/Contact_Us/index.htm?l=en origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: DOC/NOAA/NESDIS/OSDPD > Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce Contact Address: Address Type: Mailing and Physical Address: NOAA NESDIS OSDPD E/SP, RM 1069, FB4 5200 Auth Road City: Suitland State or Province: MD Postal Code: 20746-4304 Country: USA Contact Voice Telephone: 301-817-4435 Contact Facsimile Telephone: 301-457-5184 Contact Electronic Mail Address: nesdis.osdpd.web.admins@noaa.gov Publication Date: 20081215 Title: OSTM/Jason-2 Level-2 Geophysical Data Records Geospatial Data Presentation Form: data files Publication Information: Publication Place: Silver Spring, MD Publisher: NOAA National Oceanographic Data Center Other Citation Details: These data were submitted as part of an international effort for the Jason-2 satellite project. The data are archived at the National Oceanographic Data Center and served through the NOAA/NESDIS Comprehensive Large Array-data Stewardship System (CLASS). Online Linkage: www.nodc.noaa.gov CI Online Resource: Linkage: http://www.nodc.noaa.gov/cgi-bin/search/prod/accessionsView.pl/details/43269 Name: OSTM/Jason-2 Level-2 Geophysical Data Records at NODC Description: Information about OSTM/Jason-2 Level-2 Geophysical Data Records at NODC. Function: information CI Online Resource: Linkage: http://www.class.ncdc.noaa.gov/saa/products/search?sub_id=0&datatype_family=J2-XGDR Name: OSTM/Jason-2 Level-2 Geophysical Data Records at CLASS Description: Information about OSTM/Jason-2 Level-2 Geophysical Data Records at CLASS. CI Online Resource: Linkage: http://www.nodc.noaa.gov/cgi-bin/search/prod/accessionsView.pl/details/43269 Name: OSTM/Jason-2 Level-2 Geophysical Data Records at NODC Description: Search OSTM/Jason-2 Level-2 Geophysical Data Records using NODC interface. Function: search CI Online Resource: Linkage: http://www.nsof.class.noaa.gov/saa/products/search?sub_id=0&datatype_family=J2-XGDR&submit.x=16&submit.y=13 Name: OSTM/Jason-2 Level-2 Geophysical Data Records at CLASS Description: Search OSTM/Jason-2 Level-2 Geophysical Data Records from JASON-2 satellite using CLASS interface. Citation Identifier: gov.noaa.class:J2-XGDR Description: Abstract: This collection of data contains Level-2 Geophysical Data Records (X-GDR) from the Ocean Surface Topography Mission (OSTM)/Jason-2. These data are archived at the National Oceanographic Data Center (NODC) as NODC accession number 0043269 (http://www.nodc.noaa.gov/cgi-bin/search/prod/accessionsView.pl/details/43269). The data are also distributed through the NOAA/NESDIS Comprehensive Large Array-data Stewardship System ( http://www.class.noaa.gov). The level-2 X-GDR are available as 3 datatypes: Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR) and final Geophysical Data Records (GDR). The OGDRs are near-real-time records and are generated every 3-5 hours. They are based on orbits from DORIS propagator and forecast meteorological fields for the geophysical corrections. The IGDRs are based on preliminary DORIS ephemeris, analyzed meteorological grids, and preliminary auxiliary data files. The IGDRs have a latency of 1 - 2 days. The S-IGDR is a superset of the IGDR, containing the original radar echo "waveform" data. The GDRs are based on final high-precision DORIS (perhaps combined with GPS) ephemeris, final meteorological grids, ancillary and auxiliary data files. The S-GDR is a superset of the GDR, containing the waveform data. The S-GDRs are generated every 10 days. Sea Surface Height Anomaly (SSHA) files are available for IGDR and GDR. All files are available in NetCDF format and the OGDRs are also available in BUFR format. OSTM/JASON-2 is a follow-on mission continuing the TOPEX/Poseidon and Jason-1, and is designed to ensure continuity of high quality measurements for ocean science and to provide operational products for assimilation and forecasting applications. The Jason-2 satellite was launched on 20 June 2008 and reached its nominal repetitive orbit on 4 July 2008. Purpose: To ensure operational continuity for the collection and distribution of high-resolution data on ocean currents and their variations, as well as sea surface height measurements. High-precision ocean altimetry measures the distance between a satellite and the ocean surface to within a few centimeters. Accurate observations of variations in sea surface height (ocean topography) provide scientists with information about the speed and direction of ocean currents and heat stored in the ocean. This information, in turn, reveals global climate variations. Documentation: Users Guide: Citation Information: Originator: J.P. DUMONT, CLS; V. ROSMORDUC, CLS; N. PICOT, CNES; S. DESAI, NASA/JPL; H. BONEKAMP, EUMETSAT; J. FIGA, EUMETSAT; J. LILLIBRIDGE, NOAA; R. SCHARROO, ALTIMETRICS Publication Date: 20090120 Publication Time: Unknown Title: OSTM/Jason-2 Products Handbook Geospatial Data Presentation Form: Document Series Information: Series name: CNES : SALP-MU-M-OP-15815-CN EUMETSAT : EUM/OPS-JAS/MAN/08/0041 JPL : OSTM-29-1237 NOAA/NESDIS : Polar Series/OSTM J400 Issue Identification: Issue: 1 rev 3 Publication Information: Publication Place: World Wide Web Publisher: Comprehensive Large Array-data Stewardship System (CLASS) Other Citation Details: This data handbook is hosted through the NOAA CLASS (Comprehensive Large Array-data Stewardship System), an electronic library of NOAA environmental data (http://www.nsof.class.noaa.gov/saa/products/welcome); also archived at the NODC Ocean Archive System under accession number 0043269 at http://www.nodc.noaa.gov/search/prod/ Online Linkage: http://www.nsof.class.noaa.gov/release/data_available/jason/userhandbook.pdf Users Guide: Citation Information: Originator: ESA (European Space Agency) and CNES; produced by CLS. Authors: V. Rosmorduc (CLS), J. Benveniste (ESA), O. Lauret (CLS), C. Maheu (Akka), M. Milagro (SERCO), N. Picot (CNES) Publication Date: 2009 Publication Time: Unknown Title: Radar Altimetry Tutorial Edition: 2009 Geospatial Data Presentation Form: Document Publication Information: Publication Place: World Wide Web Publisher: ESA (European Space Agency) and CNES; produced by CLS. Other Citation Details: Rosmorduc, V., J. Benveniste, O. Lauret, C. Maheu, M. Milagro, N. Picot, Radar Altimetry Tutorial, J. Benveniste and N. Picot Ed., http://www.altimetry.info, 2009. This Radar Altimetry Tutorial describes applications, examples (data use cases) and techniques, including standard data processing, as well as the various satellite missions that have carried, are carrying or will carry a radar altimeter onboard, plus a range of altimetry products (data, software and documentation). A Basic Radar Altimetry Toolbox is also available. This is a collection of tools and documents designed to facilitate the use of radar altimetry data. It can read most distributed radar altimetry data, from ERS-1 & 2, Topex/Poseidon, Geosat Follow-on, Jason-1 and 2, Envisat to the Cryosat mission, and can perform processing and data editing, extraction of statistics, and visualisation of results. Online Linkage: http://earth.esa.int/brat/index.html Users Guide: Citation Information: Originator: CENTRE NATIONAL D'ETUDES SPATIALES (CNES) Publication Date: 20081127 Publication Time: Unknown Title: SALP Products Specification - Volume 1: Jason-2 User Products Edition: SALP-ST-M-EA-15704-CN Version 2.3 Geospatial Data Presentation Form: Document Publication Information: Publication Place: World Wide Web Publisher: CNES Other Citation Details: This document is aimed at defining the Jason-2 User Products. Jason data attribute (data) variables are detailed (both short and long names). Online Linkage: http://www.osdpd.noaa.gov/ml/ocean/SALP-ST-M-EA-15704-CN_0203.pdf Supplemental Information: Satellite altimetry data applications include validation and assimilation into global wave models, high seas hazards monitoring, sea surface height and ocean currents (hurricane intensity forecasts and assimilation into operational ocean models, multi-mission altimetry, fisheries, and marine transport. Time Period of Content: Time Period Information: Range of Dates/Times: Beginning Date: 200807 Ending Date: Present Currentness Reference: ground condition Status: Progress: In work Maintenance and Update Frequency: Every 3 hours, daily and every 10 days. Spatial Domain: Bounding Coordinates: West Bounding Coordinate: -180 East Bounding Coordinate: 180 North Bounding Coordinate: 66 South Bounding Coordinate: -66 Processing Level: Processing Level Identifier: NOAA Level 2 Processing Level Authority: Citation Information: Originator: Standards Working Group, Federal Geographic Data Committee Publication Date: 20021009 Title: Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata - Appendix B, NOAA Data Product Levels Edition: FGDC-STD-012-2002 Publication Information: Publication Place: 590 National CenterReston, VA 20192 Publisher: Federal Geographic Data Committee Secretariatc/o U.S. Geological Survey Online Linkage: http://www.fgdc.gov/standards/projects/FGDC-standards-projects/csdgm_rs_ex/MetadataRemoteSensingExtens.pdf CI Online Resource: Linkage: http://www.fgdc.gov/standards/projects/FGDC-standards-projects/csdgm_rs_ex/MetadataRemoteSensingExtens.pdf Protocol: http Application Profile: PDF Name: Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata, FGDC-STD-012-2002 Description: The purpose of this standard is to provide extensions to the Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata for describing geospatial data obtained from remote sensing. Function: information Keywords: Theme: Theme Keyword Thesaurus: ISO 19115 Topic Category Theme Keyword: climatologyMeteorologyAtmosphere Theme Keyword: oceans Theme Keyword: elevation Theme: Theme Keyword Thesaurus: NASA/GCMD Earth Science Keywords Theme Keyword: Earth Science > Oceans > Coastal Processes > Sea Surface Height Theme Keyword: Earth Science > Oceans > Sea Surface Topography > Sea Surface Height Theme Keyword: Earth Science > Oceans > Ocean Waves > Significant Wave Height Theme Keyword: Earth Science > Oceans > Ocean Winds > Surface Winds Theme Keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry Theme: Theme Keyword Thesaurus: None Theme Keyword: altimetry Theme Keyword: sea surface height anomaly Theme Keyword: OSTM > Ocean Surface Topography Mission Theme Keyword: climate change Theme Keyword: sea level Place: Place Keyword Thesaurus: NASA/GCMD Location Keywords Place Keyword: Geographic Region > Global Ocean Place Keyword: Vertical Location > Sea Surface Platform and Instrument Identification: Mission Name: OSTM > Ocean Surface Topography Mission Platform Full Name: JASON-2 Instrument Full Name: Poseidon-3 Platform and Instrument Identification: Mission Name: OSTM > Ocean Surface Topography Mission Platform Full Name: JASON-2 Instrument Full Name: Advanced Microwave Radiometer Instrument Short Name: AMR Platform and Instrument Identification: Mission Name: OSTM > Ocean Surface Topography Mission Platform Full Name: JASON-2 Instrument Full Name: Doppler Orbitography and Radiopositioning Integrated by Satellite Instrument Short Name: DORIS Platform and Instrument Identification: Mission Name: OSTM > Ocean Surface Topography Mission Platform Full Name: JASON-2 Instrument Full Name: Global Positioning System Payload Instrument Short Name: GPSP Platform and Instrument Identification: Mission Name: OSTM > Ocean Surface Topography Mission Platform Full Name: JASON-2 Instrument Full Name: Laser Retroreflector Array Instrument Short Name: LRA Access Constraints: None Use Constraints: None Point of Contact: Contact Information: Contact Organization Primary: Contact Organization: DOC/NOAA/NESDIS/NODC (National Oceanographic Data Center). DOC/NOAA/NESDIS/STAR/LSA (Laboratory for Satellite Altimetry). Contact Person: John Lillilbridge (LSA) or Yongsheng Zhang (NODC) Contact Position: Project Scientist Contact Address: Address Type: Mailing and Physical Address: John Lillilbridge, NOAA/NESDIS/STAR: E/RA31; 5th floor; 1335 East-West Highway. City: Silver Spring State or Province: MD Postal Code: 20910 Country: USA Contact Address: Address Type: Mailing and Physical Address: Yongsheng Zhang, NOAA/NESDIS/NODC E/OC1, SSMC3 4th Floor; 1315 East-West Highway. City: Silver Spring State or Province: MD Postal Code: 20910 Country: USA Contact Voice Telephone: 301-713-2857 x121 (John Lillilbridge) Contact Voice Telephone: (301) 713-3272 x126 (Yongsheng Zhang) Contact Facsimile Telephone: 301-713-3136 (John Lillilbridge) Contact Facsimile Telephone: (301) 713-3302 (Yongsheng Zhang) Contact Electronic Mail Address: John.Lillibridge@noaa.gov (John Lillilbridge) Contact Electronic Mail Address: Yongsheng.Zhang@noaa.gov (Yongsheng Zhang) Hours of Service: 9:00-5:00 EST Contact Instructions: Phone/FAX/E-mail/letter during regular business hours Data Set Credit: OSTM/Jason-2 is a collaboration between NASA; the National Oceanic and Atmospheric Administration (NOAA); CNES; and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT). CNES is providing the spacecraft, NASA and CNES are jointly providing the payload instruments and NASA's Launch Services Program at the Kennedy Space Center is responsible for Delta II launch management and countdown operations. After completing the on-orbit commissioning of the spacecraft, CNES will hand over its operation and control to NOAA. NOAA and EUMETSAT will generate the near-real-time products and distribute them to users. NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the mission for NASA's Science Mission Directorate in Washington. Security Information: Security Classification System: none Security Classification: Unclassified Security Handling Description: not applicable Native Data Set Environment: The level 2 geophysical data records derived from instruments aboard the JASON-2 satellite are available as 3 datatypes: Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR) and final Geophysical Data Records (GDR). The OGDRs are near-real-time records and are generated every 3-5 hours. The IGDRs are based on preliminary DORIS ephemeris, analyzed meteorological grids, and preliminary auxiliary data files. They have a data latency of 1-2 days. The S-IGDR is a superset of the IGDR, containing the original radar echo 'waveform' data. The GDRs are based on final high-precision DORIS (perhaps combined with GPS) ephemeris, final meteorological grids, ancillary and auxiliary data files. S-GDR is a superset of the GDR, containing the waveform data. They are generated every 10 days. Sea Surface Height Anomaly (SSHA) files are available for IGDR and GDR. All files are available in NetCDF format and the OGDR is also available in BUFR ((Binary Universal Form of Representation of meteorological data) format. Data Quality Information: Attribute Accuracy: Attribute Accuracy Report: The sea surface height shall be provided with a global and ultimate rms accuracy of 3.4 cm (1 sigma) over 1 second averages along JASON-1 ground-tracks for typical sea-state conditions of 2 m SWH and 11 dB sigma-naught. The accuracy on wind speed in IGDR products shall be 1.6 m/s. Near Real Time Altimeter Validation System Reports (NRTAVS) are daily and cover the previous 10-day period; distributed through the CLASS system at http://www.nsof.class.noaa.gov/saa/products/ Logical Consistency Report: Instrument calibrations and product quality shall be monitored at least weekly throughout the life of the mission. For each file sent, the Archive performs file validation of the following: file name, file size, and file checksum. CLASS currently performs file name validation. CLASS performs checksum algorithm and routines for additional validation in accordance with the NOAA Environmental Satellite Processing Center (ESPC) to the CLASS Interface Control Document (ICD). OSTM/Jason-2: NRTAVS QA Reports - Quality Reports from the Near Real-Time Altimetry Validation System (NRTAVS). Reports are daily and cover the previous 10-day period; distributed through CLASS at http://www.nsof.class.noaa.gov/saa/products/ Completeness Report: Validation failure will result in placing the file in a hold state. The Access Contact for the Producer will be contacted by CLASS Operations personnel. Information about updates and edits to Jason-2 data is available through CLASS at http://www.class.ncdc.noaa.gov/notification/news.htm#5 Jason-2 IGDR Replaced Data On 18 February 2009 the Advanced Microwave Radiometer (AMR) and Poseidon-3 Altimeter characterization files used in the processing of Jason-2 products were updated. These files are used to characterize both instruments and the evolution of their accuracy over time. This update is part of the ongoing Jason-2 calibration/validation activities, focusing on the validation of the highest accuracy Jason-2 off-line products (GDR). For the Jason-2 OGDRs the first file processed with the new characterization files was during pass #082 of cycle 23: JA2_OPN_2PcS023_082_20090218_084414_20090218_101650 JA2_OPR_2PcS023_082_20090218_084414_20090218_101650 JA2_OPB_2PcS023_082_20090218_084414_20090218_101650 For the Jason-2 IGDRs, CLASS originally received pass #001 of cycle 23 based on the older characterization files, but has subsequently received the following files based upon the new 18-Feb-2009 characterization files: JA2_IPN_2PcP023_001_20090215_044742_20090215_054355 JA2_IPR_2PcP023_001_20090215_044742_20090215_054355 JA2_IPS_2PcP023_001_20090215_044742_20090215_054355 The version of these files for pass #001 of cycle 23 are now based on the newest characterization files. The expected changes to the sea surface height and wind speed values in going from the old to the new characterization files are as follows: -7.2 mm on sea surface height +0.2 m/s on wind speed Positional Accuracy: Horizontal Positional Accuracy: Horizontal Positional Accuracy Report: The orbit maintenance requirements for altimetry missions are usually that the deviation of the actual ground track from the nominal one is kept below 1 km and that the mean local nodal crossing time matches the nominal one to better than to within five minutes. The orbit maintenance strategy aims for minimum disturbance of the payload operation. In-plane manoeuvres are used for altitude adjustment to compensate for the effects of air-drag. This altitude decay controls affects the ground-track repeatability, mainly in the equatorial regions. The frequency of these manoeuvres is determined by the rate of orbital decay, which in turn is determined by the air density, and this is a function of solar activity. The nominal rate for these in-plane manoeuvres is nominally twice a month. They do not interrupt the operations of most sensors. Out-of-plane corrections are used to correct rectify the steady drift of inclination mainly caused by solar and lunar gravity perturbations. The solar wind also influences inclination, but its contribution is typically an order of magnitude smaller than the one given made by solar and lunar gravity. Inclination drift degrades ground-track maintenance at high latitudes. The drift rate does not depend on air density and corrections are required every few months. As they are out-of-plane they require a 90-degree rotation of the spacecraft, to align the thrusters with the required thrust direction, so these manoeuvres will are performed in during eclipse to avoid the risk of optical sensors viewing the sun. The satellites Topex/Poseidon, Jason-1, and Jason-2 (OSTM) carry three tracking systems (DORIS, GPS, and laser telemetry) that enable their position in space (ephemeris) to be determined with an accuracy of +/- 1 cm. The DoRIS system is based on the principle of the Doppler effect. DORIS uses the Doppler shift on the beacon signals to accurately determine the velocity of the satellite on its orbit, and dynamic orbitography models Vertical Positional Accuracy: Vertical Positional Accuracy Report: Please see the horizontal positional report. Specific to OSTM/Jason-2: Orbital information is distributed through CLASS at http://www.nsof.class.noaa.gov/saa/products/. The satellites Topex/Poseidon, Jason-1, and Jason-2 (OSTM) carry three tracking systems (DORIS, GPS, and laser telemetry) that enable their position in space (ephemeris) to be determined with an accuracy of +/- 1 cm. The accuracy on Sea Wave Height in OGDR products shall be respectively 10% or 0.5 m (whichever is greater). Lineage: Source Information: Source Citation: Citation Information: Originator: DOC/NOAA/NESDIS/OSDPD > Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce Originator: EUMETSAT > European Meteorological Satellite Organisation origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: EUMETSAT > European Meteorological Satellite Organisation Contact Address: Address Type: Mailing and Physical Address: EUMETSAT Eumetsat Allee 1 City: Darmstadt State or Province: N/A Postal Code: D-64295 Country: Germany Contact Voice Telephone: +49(0)6151-807 7 Contact Facsimile Telephone: +49(0)6151-807 555 Contact Instructions: For information, go to: http://www.eumetsat.int/Home/Main/AboutEUMETSAT/Contact_Us/index.htm?l=en origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: DOC/NOAA/NESDIS/OSDPD > Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce Contact Address: Address Type: Mailing and Physical Address: NOAA NESDIS OSDPD E/SP, RM 1069, FB4 5200 Auth Road City: Suitland State or Province: MD Postal Code: 20746-4304 Country: USA Contact Voice Telephone: 301-817-4435 Contact Facsimile Telephone: 301-457-5184 Contact Electronic Mail Address: nesdis.osdpd.web.admins@noaa.gov Publication Date: 20081215 Title: Jason-2 data records Geospatial Data Presentation Form: data files Publication Information: Publication Place: Silver Spring, MD Publisher: NOAA National Oceanographic Data Center Other Citation Details: Raw telemetry (level-0) downlinked to the ground stations is forwarded to the quality control and processing centres. Telemetry is then processed to obtain level 1 data, i.e., data that are timed and located, expressed in the appropriate units, and checked for quality. (Jason-2's ground segment is a distributed system between NASA, CNES, Eumetsat and NOAA. On the terms and conditions specified with the quadripartite agreement for the Jason-2 project: Raw data of the Poseidon3 altimeter, DORIS and the radiometer are processed by the NOAA and Eumetsat centres to product near-real time altimetry data (OGDR); Raw data of the Poseidon-3 altimeter and the radiometer are only processed by the mission centre at CNES to product delayed time altimetry data (IGDR; S-IGDR, GDR and S-GDR)). Level 0 and Level 1 satellite altimetry data are of limited usefulness as they have not been processed for precise quality control, and are not typically distributed. Additional Jason-2 data archived at the NODC includes orbital files, level-2 geophysical data (GDR) files, auxiliary files, and documentation. Some of these data may have use restrictions, please contact the NODC or CLASS for more information or check online at the listed URL. Online Linkage: http://www.nodc.noaa.gov/search/prod/ Type of Source Media: Distributed satellite data files Source Time Period of Content: Time Period Information: Range of Dates/Times: Beginning Date: 200807 Ending Date: Present Source Currentness Reference: ground condition Source Citation Abbreviation: J2_Level1b Source Contribution: Level-2 GDRs are processed from two levels of data:1) Telemetry data (raw data or level-0) and 2) Sensor Data Records (engineering units or level-1) Process Step: Process Description: There are three levels of processed data: - Telemetry data (raw data or level 0) - Sensor Data Records (engineering units or level 1) - Geophysical Data Records (geophysical units or level 2) Level 1 data and level 2 geophysical data: Level 1 data are corrected for instrument errors, errors due to atmospheric signal propagation and perturbations caused by surface reflection. Geophysical corrections are then applied (solid earth, ocean and pole tides, etc.). Moreover, precise orbit determination (POD) can be performed to provide the highest accuracy. The level 2 geophysical data records derived from instruments aboard the JASON-2 satellite and are available as 3 datatypes: Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR) and final Geophysical Data Records (GDR). The OGDRs are near-real-time records and are generated every 3-5 hours. They are based on orbits from DORIS propagator and forecast meteorological fields for the geophysical corrections. The IGDRs are based on preliminary DORIS ephemeris, analyzed meteorological grids, and preliminary auxiliary data files. They have a data latency of 1 - 2 days. The S-IGDR is a superset of the IGDR, containing the original radar echo "waveform" data. The GDRs are based on final high-precision DORIS (perhaps combined with GPS) ephemeris, final meteorological grids, ancillary and auxiliary data files. S-GDR is a superset of the GDR, containing the waveform data. They are generated every 10 days. Sea Surface Height Anomaly (SSHA) files are available for IGDR and GDR. All files are available in NetCDF format and the OGDR is also available in BUFR format. Source Used Citation Abbreviation: Jason-2 GDR Process Date: 20081215 Source Produced Citation Abbreviation: gov.noaa.class:J2_XGDR Process Contact: Contact Information: Contact Organization Primary: Contact Organization: CNES Contact Person: Nicolas Picot Contact Position: OSTM Measurement System Engineer Contact Address: Address Type: Mailing Address: DCT/PO/AL BPI 2002; 18, Av. Edouard Belin City: Toulouse State or Province: Cedex 9 Postal Code: 31401 Country: FRANCE Contact Voice Telephone: (011) 33-5-61-28-32-53 Contact Facsimile Telephone: (011) 33-5-61-28-25-95 Contact Electronic Mail Address: nicolas.picot@cnes.fr Hours of Service: 8:30-9:30 to 17:30-19:00 Contact Instructions: Phone/FAX/E-mail/letter Cloud Cover: Unknown Spatial Data Organization Information: Indirect Spatial Reference: Jason-2's orbit is identical to that of Jason-1 (and that of Topex/Poseidon previously). It is optimized to study large-scale ocean variability and to provide coverage of 90% of the world's oceans over a ten-day cycle. Jason-2's high altitude (1,336 kilometres) reduces interactions with the Earth's atmosphere and gravity field to a minimum, thus making orbit determination easier and more precise. The orbit inclination of 66 degrees North and South enables the satellite to cover most of the globe's unfrozen oceans. The orbit's repeat cycle is just under 10 days (9.9156 days to be precise, i.e., 10 days minus two hours) - in other words, the satellite passes over the same point on the Earth's surface (to within one kilometre) every ten days. This cycle is a trade-off between spatial and temporal resolution designed for the study of large-scale ocean variability. The fact that the orbit is prograde and not sun-synchronous also avoids aliasing of different tidal components at the same frequency. The orbit is also designed to pass over two dedicated ground calibration sites: Cap Senetosa in Corsica and the Harvest oil rig platform in California, USA. Direct Spatial Reference Method: Point Point and Vector Object Information: SDTS Terms Description: SDTS Point and Vector Object Type: Point Spatial Reference Information: Horizontal Coordinate System Definition: Local: Local Description: Jason-2 was placed into the same N-S orbit around the Earth as Jason-1, at an altitude of 1,336 kilometers, inclined 66 degrees, to provide virtually complete coverage of ice-free oceans. Local Georeference Information: Jason 2 orbit parameters: Semi-major axis - 7,714.4278 km Eccentricity - 0.000095 Inclination (sun-synchronous) - 66.039 degrees; Reference altitude (equatorial) - 1336 km Nodal period - 6 745.72 seconds (112'42" or 1h52') Repeat cycle - 9.9151 days Number of passes per cycle - 254 Ground track separation at Equator - 315 km Acute angle at Equator crossings - 39.5 degrees; Longitude at Equator of pass 1 - 99.9242 degrees; Orbital velocity - 7.2 km/s Ground scanning velocity - 5.8 km/s A satellite's orbit parameters tend to change over time as a result of atmospheric drag. In the long term, more or less periodic variations also occur due to instabilities in the Earth's gravity field, solar radiation pressure and other forces of smaller magnitude. Orbit manoeuvres are performed every 40 to 200 days. Intervals between manoeuvres depend chiefly on solar flux and each manoeuvre lasts from 20 to 60 minutes. Wherever possible, they are performed at the end of the orbit cycle, and above solid earth, so that lost data acquisition time is reduced to a minimum. Entity and Attribute Information: Overview Description: Entity and Attribute Overview: List of Datatypes: Longitude (lon); Latitude (lat); Sea Surface Height anomaly (ssha); Mean sea surface height (mss); Ku band corrected significant wave height(swh_ku); C band corrected significant wave height (swh_c); Ku band corrected backscatter coefficient (sig0_ku); C band corrected backscatter coefficient (sig0_c); Geoid Height (Geoid); Ocean depth/land elevation (bathymetry); Ku band corrected AGC (agc_ku); C band corrected AGC (agc_c); 18.7 GHz main beam brightness temperature (tb_187); 23.8 GHz main beam brightness temperature (tb_238); 34 GHz main beam brightness temperature (tb_340); Altimeter wind speed (wind_speed_alt); Radiometer wind speed (wind_speed_rad); Radiometer water vapor content (rad_water_vapor); Radiometer liquid water(rad_liquid_water); Altimeter ionospheric correction on Ku band (iono_corr_alt_Ku); Sea state bias correction in Ku band (sea_state_bias_Ku) and Mean dynamic topography (mean_topography). Entity and Attribute Detail Citation: OSTM/Jason-2 Products Handbook, J.P. DUMONT, CLS; V. ROSMORDUC, CLS; N. PICOT, CNES; S. DESAI, NASA/JPL; H. BONEKAMP, EUMETSAT; J. FIGA, EUMETSAT; J. LILLIBRIDGE, NOAA; R. SCHARROO, ALTIMETRICS, August 3, 2009, Issue 1 rev4, http://www.class.ncdc.noaa.gov/release/data_available/jason/userhandbook.pdf Distribution Information: Distributor: Contact Information: Contact Organization Primary: Contact Organization: DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce; DOC/NOAA/CLASS > Comprehensive Large Array-data Stewardship System, NOAA, U.S. Department of Commerce Contact Person: NODC User Services (Andrew Allegra or Kelly Logan) Contact Address: Address Type: Mailing and Physical Address: NODC User Services, NOAA/NESDIS/NODC E/OC1, SSMC3 4th Floor; 1315 East-West Highway City: Silver Spring State or Province: MD Postal Code: 20910-3282 Country: USA Contact Address: Address Type: Mailing and Physical Address: NOAA Comprehensive Large Array-data Stewardship System (CLASS), 151 Patton Avenue City: Asheville State or Province: NC Postal Code: 28801-5001 Country: USA Contact Voice Telephone: (301) 713-3277 (NODC User Service) Contact Voice Telephone: (828) 271-4850 x3183 (CLASS) Contact Facsimile Telephone: (301) 713-3302 (NODC User Service) Contact Facsimile Telephone: (828) 271-4328 (CLASS) Contact Electronic Mail Address: NODC.Services@noaa.gov (NODC User Service) Contact Electronic Mail Address: Class.Help@noaa.gov (CLASS help desk) Hours of Service: 9:00 - 5:00 EST Contact Instructions: Phone/E-mail/Letter Resource Description: Ocean Surface Topography Mission (OSTM)/Jason-2: Level-2 Geophysical Data Records (GDR). These data are filed under NODC Accession 0043269. Data is distributed via CLASS (www.class.noaa.gov). A tutorial for downloading data from CLASS is available at: http://www.class.ncdc.noaa.gov/release/data_available/jason/jason2tutorial.html Distribution Liability: Disclaimer - While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Standard Order Process: Resource Description: The level 2 geophysical data records derived from instruments aboard the JASON-2 satellite are available as three data types: Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR) and final Geophysical Data Records (GDR). The OGDRs are near-real-time records and are generated every 3-5 hours. The IGDRs are based on preliminary DORIS ephemeris, analyzed meteorological grids, and preliminary auxiliary data files. They have a data latency of 1 - 2 days. The S-IGDR is a superset of the IGDR, containing the original radar echo "waveform" data. The GDRs are based on final high-precision DORIS (perhaps combined with GPS) ephemeris, final meteorological grids, ancillary and auxiliary data files. S-GDR is a superset of the GDR, containing the waveform data. They are generated every 10 days. Sea Surface Height Anomaly (SSHA) files are available for IGDR and GDR. All files are available in NetCDF format and the OGDR is also available in BUFR format. Off-line datatypes (GDR, S-GDR, GDR-SSHA, IGDR, S-IGDR, IGDR-SSHA) are pass-based, containing 1 full pass per file. Digital Form: Digital Transfer Information: Format Name: NetCDF Format Information Content: The level 2 geophysical data records derived from instruments aboard the JASON-2 satellite are available as three datatypes: Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR) and final Geophysical Data Records (GDR). The OGDRs are near-real-time records and are generated every 3-5 hours. The IGDRs are based on preliminary DORIS ephemeris, analyzed meteorological grids, and preliminary auxiliary data files. They have a data latency of 1 - 2 days. The S-IGDR is a superset of the IGDR, containing the original radar echo "waveform" data. The GDRs are based on final high-precision DORIS (perhaps combined with GPS) ephemeris, final meteorological grids, ancillary and auxiliary data files. S-GDR is a superset of the GDR, containing the waveform data. They are generated every 10 days. Sea Surface Height Anomaly (SSHA) files are available for IGDR and GDR. All files are available in NetCDF format and the OGDR is also available in BUFR format. Off-line datatypes (GDR, S-GDR, GDR-SSHA, IGDR, S-IGDR, IGDR-SSHA) are pass-based, containing 1 full pass per file. File Decompression Technique: no compression applied Transfer Size: 15.0 Digital Transfer Option: Online Option: Computer Contact Information: Network Address: Network Resource Name: http://www.nodc.noaa.gov/cgi-bin/search/prod/accessionsView.pl/details/43269 Network Resource Name: http://www.nsof.class.noaa.gov/saa/products/search?sub_id=0&datatype_family=J2-XGDR&submit.x=17&submit.y=16 CI Online Resource: Linkage: http://www.class.noaa.gov/nsaa/products/search?sub_id=0&datatype_family=J2-XGDR Name: OSTM/Jason-2: Level-2 Geophysical Data Records Description: Download options for OSTM/Jason-2: Level-2 Geophysical Data Records archived and distributed at CLASS. Function: download Access Instructions: The NODC Ocean Archive may be searched online for a given accession via the 7-digit NODC Accession Number listed in this description. Additional search parameters may be selected by a user through a selection of check boxes. Retrieved data may be directly downloaded. The data described in this metadata record (NODC Accession number 0043269) are distributed via NOAA CLASS due the file size and complexity. Online Computer and Operating System: PC, Mac, Linux, UNIX, Standard Internet browser Digital Form: Digital Transfer Information: Format Name: BUFR (Binary Universal Form) Format Information Content: Operational Geophysical Data Records (OGDR) records only File Decompression Technique: No compression applied Transfer Size: 15.0 Digital Transfer Option: Online Option: Computer Contact Information: Network Address: Network Resource Name: http://www.nodc.noaa.gov/search/prod/ CI Online Resource: Linkage: http://www.class.noaa.gov/nsaa/products/search?sub_id=0&datatype_family=J2-XGDR Name: OSTM/Jason-2: Level-2 Geophysical Data Records Description: Download options for OSTM/Jason-2: Level-2 Geophysical Data Records archived and distributed at CLASS. Function: download Access Instructions: Access to these data is provided through NODC's Ocean Archive System (http://www.nodc.noaa.gov/search/prod/) under NODC Accession Number 0043269, which also also holds data documentation in the "about" folder. Direct data access is provided through the Comprehensive Large Array-data Stewardship System (CLASS) at http://www.nsof.class.noaa.gov/saa/products/search?sub_id=0&datatype_family=J2-XGDR. CLASS requires user registration. Online Computer and Operating System: PC, Mac, Linux, UNIX, Standard Internet browser Fees: Electronic download (FTP) of the data is free. There is a fee for copies of data on physical media. Optical disks are $25.00 per unit and magnetic tape is $100 per unit. Price does not include additional service and handling costs. Ordering Instructions: The option to order data for shipping will occur at the order checkout stage, from which you will then proceed to another NOAA site to provide shipping and billing addresses and credit card information. Contact the CLASS Help Desk (info@class.noaa.gov) for instructions for payment by other means. Turnaround: Delivery of physical media occurs within 1 to 2 weeks, but may take longer for large orders. Custom Order Process: A tutorial on ordering data from CLASS is illustrated at http://www.class.ncdc.noaa.gov/release/data_available/jason/jason2tutorial.html; users may also contact the NODC directly for assistance at the contact listed in the DISTRIBUTION section of this metadata record. Technical Prerequisites: CLASS requires user registration. PC, Mac, UNIX or other, standard Internet browser, ability to work with/utilize satellite altimetry data files strongly recommended. Available Time Period: Time Period Information: Range of Dates/Times: Beginning Date: 200807 Ending Date: Present Metadata Reference Information: Metadata Date: 20090825 Metadata Review Date: 20100731 Metadata Future Review Date: 20101231 Metadata Contact: Contact Information: Contact Organization Primary: Contact Organization: NOAA National Oceanographic Data Center Contact Person: Yongsheng Zhang and Sheri Phillips Contact Address: Address Type: Mailing and Physical Address: NOAA National Oceanographic Data Center E/OC1 SSMC3, 4th floor, Room 4701 1315 East-West Highway City: Silver Spring State or Province: MD Postal Code: 20910 Country: USA Contact Voice Telephone: 301-713-3272 x126 Contact Facsimile Telephone: 301-713-3302 Contact Electronic Mail Address: yongsheng.zhang@noaa.gov Hours of Service: 8:00-5:00 PM, EST Contact Instructions: Phone, FAX, E-mail, Letter Metadata Standard Name: Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata Metadata Standard Version: FGDC-STD-012-2002 Metadata Time Convention: local time Metadata Access Constraints: none Metadata Use Constraints: none Metadata Security Information: Metadata Security Classification System: not applied Metadata Security Classification: Unclassified Metadata Security Handling Description: not applicable Metadata Extensions: Online Linkage: http://www.ngdc.noaa.gov/metadata/extensions/local_extensions.html Profile Name: NGDC Extensions to FGDC Metadata Platform and Mission Information: Mission Information: Mission Name: OSTM > Ocean Surface Topography Mission Mission Description: OSTM is a cooperation between the space agencies CNES and NASA and the operational agencies EUMETSAT and NOAA. The OSTM organisation focuses on the transition towards operational applications. Therefore, the four partners of the OSTM have agreed on a natural cooperation and division of responsibilities. Project management is still in the hands of NASA and CNES, but now with the support of NOAA and EUMETSAT. CNES provides the PROTEUS bus of Jason-2, including the altimeter and the DORIS receiver, while NASA delivers the radiometer, the GPS Receiver, and the Laser Retroreflector Array. NASA procures the launcher and launch services and CNES will be in charge of the overall system integration. EUMETSAT and NOAA provide earth terminals and part of the ground network. In addition, they are responsible for near-real-time product processing, archiving, product dissemination and user support. Platform Information: Platform Full Name: JASON-2 Platform Start Date: Single Date/Time: Calendar Date: 20080704 Platform Sponsor: EUMETSAT > European Meteorological Satellite Organisation Platform Sponsor: DOC/NOAA > National Oceanic & Atmospheric Administration Platform Sponsor: FR/CNES > Centre National d'Etudes Spatiales, France Platform Sponsor: NASA > National Aeronautics and Space Administration Platform Description: JASON-2 * Instruments: Poseidon-3 Altimeter, Advanced Microwave Radiometer (AMR), Doppler orbitography and radiopositioning integrated from space (DORIS), and Global Positioning System Space Receiver (GPSP). * Launched date: June 20, 2008. * Orbit: Altitude: 1336 km, Circular, non-sun-synchronous, 66 degrees inclination, Global data coverage between 66 degrees N and 66 degrees S latitude, 10-day repeat of ground track (+/- 1 km accuracy), and coverage of 95% of ice-free oceans every 10 days. * Mission Duration: Jason-2 has a designed lifetime of about 5 years. Instrument Information: Instrument Full Name: Poseidon-3 Instrument Description: Instrument Type: radar altimeter Collection Type: Fixed nadir-pointing beam Other Collector Description: Poseidon-3 emits pulses at two frequencies (13.6 and 5.3 GHz, the second frequency is used to determine electron content in the atmosphere) and analyzes the return signal reflected by the surface. The signal round-trip time is estimated very precisely to calculate the range, after applying corrections. It measures sea level, wave heights and wind speed. It is also able to estimate atmospheric electron content. Poseidon-3 will be coupled with DORIS, in order to improve measurements over coastal areas, inland waters and ice Instrument Properties Description: Poseidon-3, or SSALT (for Solid State ALTimeter), uses solid-state amplification techniques. * Emitted Frequency (GHz): Dual-frequency (Ku, C) - 13.575 and 5.3, * Pulse Repetition Frequency (Hz): 2060 interlaced {3Ku-1C-3Ku}, * Pulse duration (microseconds): 105, * Bandwidth (MHz): 320 (Ku and C), * Antenna diameter (m): 1.2, * Antenna beamwidth (degrees): 1.28 (Ku), 3.4 (C), * Power (W): 7, * Redundancy: Yes, * Specific features: Solid-State Power Amplifier, Dual-frequency for ionospheric correction, and High resolution in C band (320 MHz). Instrument Reference: Citation Information: Originator: CNES origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: FR/CNES > Centre National d'Etudes Spatiales, France Contact Address: Address Type: Mailing Address: Centre national d'?tudes spatiales 2 place Maurice Quentin City: PARIS CEDEX 01 State or Province: N/A Postal Code: 75 039 Country: FRANCE Contact Voice Telephone: 33 (0)1.44.76.75.00 Contact Facsimile Telephone: 33 (0)1.44.76.76.76 Contact Instructions: For information, go to: http://www.cnes.fr/web/CNES-en/475-contact.php Publication Date: Unknown Title: Reference to CNES document? Instrument Information: Instrument Full Name: AMR > Advanced Microwave Radiometer Instrument Description: Instrument Type: radiometer Collection Type: microwave Other Collector Description: AMR acquires measurements via three separate frequency channels to determine the path delay of the altimeter's radar caused by atmospheric water vapor. This instrument measures radiation from Earth's surface at three frequencies (18, 21 and 37 GHz). Measurements acquired at each frequency are combined to determine atmospheric water vapor and liquid water content. Once the water content is known, we can determine the correction to be applied for radar signal path delays. Instrument Reference: Citation Information: Originator: CNES origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: FR/CNES > Centre National d'Etudes Spatiales, France Contact Address: Address Type: Mailing Address: Centre national d'?tudes spatiales 2 place Maurice Quentin City: PARIS CEDEX 01 State or Province: N/A Postal Code: 75 039 Country: FRANCE Contact Voice Telephone: 33 (0)1.44.76.75.00 Contact Facsimile Telephone: 33 (0)1.44.76.76.76 Contact Instructions: For information, go to: http://www.cnes.fr/web/CNES-en/475-contact.php Publication Date: Unknown Title: Reference to CNES document TBD Instrument Information: Instrument Full Name: DORIS > Doppler Orbitography and Radiopositioning Integrated by Satellite Instrument Description: Instrument Type: positioning/navigation Collection Type: radio Other Collector Description: DORIS is based on the accurate measurement of the Doppler shift of radiofrequency signals transmitted from ground-based beacons and received onboard the spacecraft when it passes over. Measurements are made at two frequencies: 2.03625 GHz for precise Doppler measurement and 401.25 MHz for ionospheric correction. The 401.25 MHz measurement is also used for time tagging and auxiliary data. Instrument Reference: Citation Information: Originator: CNES origin_cntinfo: Contact Information: Contact Organization Primary: Contact Organization: FR/CNES > Centre National d'Etudes Spatiales, France Contact Address: Address Type: Mailing Address: Centre national d'?tudes spatiales 2 place Maurice Quentin City: PARIS CEDEX 01 State or Province: N/A Postal Code: 75 039 Country: FRANCE Contact Voice Telephone: 33 (0)1.44.76.75.00 Contact Facsimile Telephone: 33 (0)1.44.76.76.76 Contact Instructions: For information, go to: http://www.cnes.fr/web/CNES-en/475-contact.php Publication Date: Unknown Title: Reference to CNES document TBD Instrument Information: Instrument Full Name: GPSP > Global Positioning System Payload Instrument Description: Instrument Type: positioning/navigation Collection Type: receiver Other Collector Description: The GPSP receives dual-frequency navigation signals continuously and simultaneously from 16 GPS satellites. It uses these signals to acquire phase measurements accurate to about one millimeter and pseudo-range measurements accurate to about 10 centimeters. Instrument Properties Description: The onboard system consists of two independent receivers operating in cold redundancy, each with an omnidirectional antenna, low-noise amplifier, quartz oscillator, sampling converter, and a baseband digital processor communicating via the bus interface. Instrument Reference: Citation Information: Originator: NASA Publication Date: Unknown Title: Reference to NASA document TBD Instrument Information: Instrument Full Name: LRA > Laser Retroreflector Array Instrument Description: Instrument Type: reflector Collection Type: TBD Other Collector Description: The LRA is an array of mirrors that provide a target for laser tracking measurements from the ground. By analyzing the round-trip time of the laser beam, we can locate where the satellite is on its orbit. It is a totally passive reflector designed to reflect laser pulses back to their point of origin on Earth. It is used for the calibration of the Precise Orbit Determination system on the spacecraft. Instrument Properties Description: The retroflectors are placed on the nadir face of the satellite. The totally passive unit consists of nine quartz corner cubes arrayed as a truncated cone, with one cube in the centre and the others arranged azimuthally around the cone. This arrangement will allow laser ranging at field-of-view angles of 360 degrees in azimuth and 60 degrees elevation around the perpendicular. The retroreflectors are optimised for a wavelength of 532 nanometers (green), offering a field of view of about 100 degrees. Instrument Reference: Citation Information: Originator: NASA Publication Date: Unknown Title: Reference to NASA document TBD