Aquarius Radio Frequency Interference (RFI) Ancillary Dataset V1.0

Description

Aquarius ancillary Radio Frequency Interference (RFI) product used in ADPS mission processing contains monthly-averaged Radio Frequency Interference (RFI) data for ascending/descending passes as detected by the Aquarius radiometers and scatterometer. The data is available for ascending (northward) and descending (southward) passes of the satellite only and ascending/descending passes combined. The values stored in this product are the percentage of radiometer and scatterometer measurements identified as corrupted by interference by the RFI detection algorithms [1,2] within each data point, averaged over one month. An additional RFI flag [3] is used to identify locations where the measured brightness temperature over land exceeds the expected limits of surface emissivity. This flag is not used to remove samples from further processing, but, in generating the radiometer RFI data, 100% RFI is assigned to points where this flag is raised. This product can be used to reproduce the RFI maps available on the Aquarius website at University of Maine (https://aquarius.umaine.edu/cgi/gal_radiometer.htm for the radiometer, and https://aquarius.umaine.edu/cgi/gal_scatterometer.htm for the scatterometer), by plotting the variables Rad_RFI_percent_AscDes_AllBeams and Scat_RFI_percent_AscDes_AllBeams on the latitude/longitude grid. Additionally, the user can generate maps by using only a particular beam or only ascending passes, for example. All combinations of beams and ascending/descending passes are possible. This product contains information about RFI, but it is also relevant for the retrieved Sea Surface Salinity (SSS). Over the ocean, the RFI percentage in this product corresponds to the amount of raw measurements discarded due to RFI contamination before SSS retrieval. Therefore, maps of the RFI percentage can give the user an indication of where RFI is more likely to have affected the quality of SSS retrievals, for a particular month, or for a series of months.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FAQR00-RFI01
22 Thumbnail https://podaac.jpl.nasa.gov/Podaac/thumbnails/AQUARIUS_ANCILLARY_RFI_V1.jpg
33 Aquarius RFI Product User's Guide https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/aquarius/open/docs/v5/Aquarius_RFI_products_UserGuide.pdf
21 NASA Aquarius/SAC-D mission website https://aquarius.oceansciences.org/
21 Data Use and Citation Policy https://podaac.jpl.nasa.gov/CitingPODAAC
21 HTTPS endpoint for data browse and download https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2617176765-POCLOUD
21 Browse granule search results in Earthdata Search https://search.earthdata.nasa.gov/search/granules?p=C2617176765-POCLOUD
21 MATLAB read software https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/aquarius/open/sw/matlab/aquarius_matlab_readers.tgz
21 Interactive Data Language read software https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/aquarius/open/sw/idl/aquarius_IDL_readers.tgz

Tags

  • salinity-density
  • oceans
  • earth-science

Topics

Categories