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Journal for accession number:  0221186
Created on:                    2020-10-26 06:12:09 UTC
By:                            NCEI

Source: Global surface underway marine data from the NCEI Surface Underway
Marine Database (SUMD) submitted by NCEI personnel. These underway data are
from multiple data assembly centers, including the Center for
Ocean-Atmospheric Prediction Studies (COAPS, the Shipboard Automated
Meteorological and Oceanographic System (SAMOS) data), Institut français de
recherche pour l'exploitation de la mer (IFREMER, The Global Ocean Surface
Underway Data (GOSUD) data), Atlantic Oceanographic & Meteorological
Laboratory (AOML-TSG data), and NOAA National Centers for Environmental
Information (NCEI, accessions containing surface underway data). The SAMOS
TSG dataset is submitted by S. Smith and his colleagues. SAMOS data have
been archived at NCEI monthly since 2009-03 and are available at
https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:COAPS-SAMOS. The
GOSUD data are archived and available at
https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:IODE-GOSUD. The
GOSUD data are managed by Loic Petit de la Villeon, IFREMER. The AOML-TSG
data are available at
https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:AOML-TSG. They are
managed by Gustavo Goni and Francis Bringas, NOAA's AOML. For each
individual netCDF file, the source information (original source files
located) is available in the global "source" attribute.

Actions: NCEI personnel copied the data from the SUMD project folder
/nodc/projects/tsg/data/ to the 0-data/ directory. This SUMD dataset was
created by NCEI personnel using data all archived at NCEI. Data from
different sources were compared with each other and duplicate data points were
removed. When different versions of a dataset were available, the dataset with
the highest resolution was always chosen. All data were converted to a common
netCDF format following the NCEI netCDF Templates v2.0 - Trajectory type. All
data were processed using the same 11-step quality control procedures and
criteria and flagged using a two-level flag system to provide a
well-organized, uniformly quality-controlled surface underway marine dataset.

Files:
about/
This directory contains files generated by NCEI with ancillary information
about the data submission.

0221186_lonlat.txt -t
  Contains sample locations for these data.  Each row contains the
  geographical position where these data were collected (longitude in the
  left column and latitude in the right column, both in degrees).

0221186_map.jpg -
  Vessel location map for these data.

data/0-data/
This directory contains the data files created at NCEI. The files are organized as year/month.

File naming convention is as follows:

  SHIPCODE_YYYYMM_XXXXV1.nc

Where,
  SHIPCODE - The ID code assigned to each platform. Callsign is used when is available.
    If the callsign is not found, a code similar to callsign is given to that platform. 
  YYYY - The four digit year for the data collected.
  MM - The two digit month for the data collected.
  XXXX - The four digit wmo square number (10 degrees x 10 degrees) 
  V1 - Version number
  nc - netCDF format