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Journal for accession number:  0209037
Created on:                    2020-02-05 13:28:13 UTC
By:                            Yongsheng Zhang, NCEI

Source: These data were submitted for archive to NCEI from the Center for
Satellite Applications and Research (STAR), NOAA, as part of the
oceanographic products from SAR-wind.

Actions: Data were uploaded by STAR to the Production Distribution and
Access (PDA) system; NCEI downloaded the data and SHA-384 fixity information
files from the PDA. The data files were validated against the SHA-384 fixity
information. An archival information package (NCEI Accession) was generated
and the netCDF and GeoTiFF files were copied to the data/0-data/ directory.
A sample browse graphic for the Sea Surface wind data provided by the
producer was copied to the about/ directory.

Files:

about/ 
This directory contains files created by NCEI staff, including 'negotiable'
information between NCEI staff and the data provider.

0209037_preview.png -
  Sample of a regional map for Level-2 Sea Surface Wind from SENTINEL-1A data.

data/0-data/
This directory contains the data files as submitted to NCEI, including both
graphics and NetCDF data files.

1. NetCDF data files:
S1X_PCenter_YYYY_MM_DD_HH24_MI_SS_JJJJJJJJJJ_DDD.DD[EW]_DD.DD[NS]_ PP_F#_Model_wind_level2.nc

Where:
S1X=S1A or S1B representing Sentinel-1A or Sentinel-1B respectively
PCenter=is the processing location identifier (variable length); e.g. ESA
YYYY=is the 4 digit year
MM=is the 2 digit month of the year (01-12)
DD=is the 2 digit day of the month (01-31)
HH24=is the 2 digit hour of the day (UTC time 00-23)
MI=is the 2 digit minute of the hour (00 - 59)
SS=is the 2 digit second of the minute (00-59)
JJJJJJJJJJ=is the 10 digit Julian Seconds of the date (1 January 2000 at 00:00 equals 0000000000) Times prior to 2000 will have a leading minus (-) sign
DDD.DD[EW]=is the Longitude in decimal degrees + (East or West)
DD.DD[NS]=is the Latitude in decimal degrees + (North or South)
PP=is the transmit and receive polarization (HH, VV, HV, VH)
F#=Geophysical model function ID used for the conversion where F (a single digit) is frequency and # is a positive number (1 or more digits), which represents which geophysical model function (GMF) was used for the wind retrieval.The default value is 0.
Model=is a string designating the model winds used for direction (="Fixed" if no model directions were used)
wind=Data type
level2= Level-2 derived product
.nc (netCDF file extension)

e.g. S1A_ESA_2015_10_06_00_20_29_0497406029_35.47W_76.28S_HH_C5_GFS05CDF_wind_level2.nc

2. GeoTIFF files:
S1X_PCenter_YYYY_MM_DD_HH24_MI_SS_JJJJJJJJJJ_DDD.DD[EW]_DD.DD[NS]_ PP_F#_Model_wind_level2.tiff -
  Sea Surface wind data set from SENTINEL-1X in GeoTIFF format at a given location.

File naming convention uses "_" as delimiters and the first element is an
abbreviated version of the SAR sensor/satellite. S1X=S1A (for Sentinel-1A) or S1B (for Sentinel-1B); <PCenter>=the name of the 
processing center as included in the original data (e.g. ESA); YYYY_MM_DD=Numeric
Year-Month-Day of center of data acquisition in UTC; HH24_MM_SS=Numeric Hour-Minute-Second
of center of data acquisition in UTC; JJJJJJJJJJ = JULIAN SECONDS of center of data acquisition. 
Seconds are referenced with respect to January 1, 2000 00:00:00 UTC; DDD.DD(EW) = Longitude in 
degrees; DDD.DD(NS) = Latitude in degrees, E or W; PP = HH, VV, HV, or VH polarization; F#=The 
first letter represents the SAR frequency, L-band, C-band, or X-band. The digit(s) (#) represent which
geophysical model function (GMF) was used for the wind retrieval. The default value is 0;
Model=is a string designating the model winds used for direction; wind=Data type; level2=File type; '.tiff' represents 
the file is in GeoTiff format.