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

Metadata Updated: December 6, 2023

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.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date April 27, 2023
Metadata Updated Date December 6, 2023

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date April 27, 2023
Metadata Updated Date December 6, 2023
Publisher NASA/JPL/PODAAC
Maintainer
Identifier C2617176765-POCLOUD
Data First Published 2017-12-19
Language en-US
Data Last Modified 2017-12-19
Category AQUARIUS SAC-D, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Yan Soldo, Paolo De Matthaeis, David Levine. 2018-01-30. Aquarius RFI Products. Version 1. Aquarius RFI Products. Goddard Space Flight Center, 8800 Greenbelt Rd.; Greeenbelt, Md., 20771. Archived by National Aeronautics and Space Administration, U.S. Government, NASA Goddard Space Flight Center (GSFC). https://doi.org/10.5067/AQR00-RFI01. http://podaac.jpl.nasa.gov/salinity/data.html. Yan Soldo, Paolo De Matthaeis, David Levine, NASA Goddard Space Flight Center (GSFC), 2018-01-30, Aquarius Radio Frequency Interference (RFI) Ancillary Dataset V1.0, http://podaac.jpl.nasa.gov/salinity/data.html.
Creator Yan Soldo, Paolo De Matthaeis, David Levine
Graphic Preview Description Thumbnail
Graphic Preview File https://podaac.jpl.nasa.gov/Podaac/thumbnails/AQUARIUS_ANCILLARY_RFI_V1.jpg
Harvest Object Id 42daf60b-53e5-49c0-abe5-6334cf2e8d4e
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/AQR00-RFI01
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Release Place Goddard Space Flight Center, 8800 Greenbelt Rd.; Greeenbelt, Md., 20771
Series Name Aquarius RFI Products
Source Datajson Identifier True
Source Hash d27cd533f507cb85145912a5269e3ce8841c39704427f3b37a05e9018aad2849
Source Schema Version 1.1
Spatial
Temporal 2011-09-01T00:00:00Z/2015-06-01T23:59:59.999Z

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