Below is a table of the standard field names and associated units for use in submitting data to the SeaBASS bio-optical archive. The field names are NOT case sensitive. Use the search bar or the find function in your browser to search the table for words or patterns found in the field names, units or descriptions.
Special notes regarding wavelength-specific measurements: There are two different ways to indicate wavelengths in a SeaBASS file. If metadata such as date, location or depth vary within a file, then wavelength should be appended to the field name for every measurement combination. For example, downwelling irradiance measured at 412.3 nm would become 'Ed412.3' (listed along with any other Ed measurements, like Ed416.2, Ed419, etc), or aerosol optical thickness measured at 1020 nm would become 'AOT1020'. Alternately, if date, location and depth are assumed to be approximately constant for all measurements in the file, then use the field 'wavelength' to provide a column of the measured wavelengths and don't include them as part of the field names (this layout is commonly used for reporting spectrophotometric measurements).
To provide additional information about a field, for example, the standard deviation of the reported average of replicate measurements, refer to the tables of field name suffixes and modifiers below. These tables offer consistent patterns used to name certain types of measurements without having to hardcode a new name in SeaBASS. For example, standard deviations are explained in the table of suffixes, for example "chl_sd" or "ag510_sd". The table of modifiers includes ways to dynamically report special measurements, such as size fractionated data (see _###filt and _###prefilt). Please contact SeaBASS staff if you want to discuss adding new fields.
The SeaBASS sea surface temperature (SST) validation system is designed to provide ground-truth of satellite-borne measurements via comparisons with coincident in situ temperature measurements. Successful match-ups are compiled into one global file per date for each different sensor and made available via a simple web-based search engine.
This article explains how to search for and download results, how to work with validation files, and provides background information describing the steps involved in creating validation match-ups.
The NASA OBPG routinely downloads data from the AERONET-Ocean Color website for use in satellite sensor validation match-up analysis. As described by Zibordi et al. (2009), the AERONET-OC network consists of globally distributed autonomous radiometer systems maintained at fixed offshore sites. Please refer to the rest of the information in this article for details on how to acknowledge the use of AERONET-OC data and how the OBPG processes these data.
- find relevant OB.DAAC satellite granules from in situ points or a SeaBASS data file and
- generate coincident satellite validation match-ups for those points.