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 organization is commonly used for reporting spectrophotometry measurements).
To provide additional information about a field, for example, the standard deviation of the reported average of replicate measurements, refer to the table of field name modifiers below. For example, "chl_sd" or "ag510_sd". More information and examples can be found in the tables of suffixes and modifiers. Please contact SeaBASS staff if you want to discuss adding new fields.
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.
The SeaBASS validation system is designed to provide ground-truth comparisons between in situ measurements and coincident satellite-borne ocean color instrument observations. The results are displayed and distributed via a web-based search engine, available for assessments of satellite measurements and algorithm performance. This article briefly summarizes the following steps involved in this system of creating match-ups: 1) Assembly of in situ data; 2) Reduction of in situ data to relevant observations; and 3) Preparation of coincident satellite imagery.