This data set consists of satellite measurements of global data obtained by the
Moderate Resolution Imaging Spectroradiometer (MODIS), in orbit on the Aqua
(formerly EOS PM) platform. MODIS ocean color and SST products are processed
and distributed by the Ocean Biology Processing Group (OBPG). Processing
details can be found at http://oceancolor.gsfc.nasa.gov/DOCS/MODISA_processing.html
The ... Level 1B data set contains calibrated and geolocated at-aperture radiances
generated from Level 1A sensor counts and GEO files. Additional data are
provided, including quality flags, error estimates, and calibration data.
There are differences between the Level 1B produced and distributed by OBPG and
the Standard Level 1B files (MYD021KM, MYD02HKM, MYD02QKM) produced by MODIS
Calibration Support Team (MCST). This is because OBPG uses the Ocean subsetted
Level 1A products as input to the Level 1B processing. The Ocean subsetted
products contain only those bands that are used for Ocean product generation.
The standard Level-1B processing code (MYD_PR02) is developed and maintained by
the MODIS Calibration Support Team (MCST). The OBPG uses a slightly modified
version of MYD_PR02 to handle subsetted Level-1A.
Information about the OBPG MODIS Level-1B products can be found at
Please, read the MODIS Ocean Parent document for more details:
Browse Level 1 data at http://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sen=am
Aqua MODIS Level 1B daytime data for the most-recent days can be downloaded at
Aqua MODIS Level 1B nighttime data for the most-recent days can be downloaded