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

(AQUARIUS_ANCILLARY_RFI_V1)
Version1
Processing Level3
Start/Stop Date2011-Sep-01 to 2015-Jun-01
Short NameAQUARIUS_ANCILLARY_RFI_V1
DescriptionAquarius 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.
DOI10.5067/AQR00-RFI01
MeasurementOCEANS > SALINITY/DENSITY > SALINITY
Platform/Sensor
Aquarius SAC-D
Platform
Name: Aquarius SAC-D (Aquarius SAC-D)
Orbit Period: 98.0 minutes
Inclination Angle: 98.0 degrees
/
AQUARIUS_RADIOMETER
SENSOR
Name: Aquarius Radiometer (AQUARIUS_RADIOMETER)
Swath Width: 390.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

Aquarius SAC-D
Platform
Name: Aquarius SAC-D (Aquarius SAC-D)
Orbit Period: 98.0 minutes
Inclination Angle: 98.0 degrees
/
AQUARIUS_SCATTEROMETER
SENSOR
Name: Aquarius Scatterometer (AQUARIUS_SCATTEROMETER)
Swath Width: 390.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectAQUARIUS SAC-D (AQUARIUS SAC-D)
Data ProviderPublisher: NASA Goddard Space Flight Center (GSFC)
Creator: Yan Soldo, Paolo De Matthaeis, David Levine
Release Place: Goddard Space Flight Center, 8800 Greenbelt Rd.; Greeenbelt, Md., 20771
Release Date: 2018-Jan-30
Resource: http://podaac.jpl.nasa.gov/salinity/data.html

FormatHDF5
Keyword(s)Aquarius, polar, sun-synchronous, RFI, Radio Frequency Interference, CONAE, argentina
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Temporal Resolution: Monthly - < Annual
 
Coverage
Region: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2011-Sep-01 to 2015-Jun-01
Granule Time Span: 2011-Sep-01 to 2015-Jun-01
 
Projection
Projection Type: Gridded
Ellipsoid: WGS 84
 
NameLong NameUnit
/Radiometer/Rad_RFI_percent_AscPercent of radiometer samples flagged as RFI (individual beams; ascending passes only)%
/Radiometer/Rad_RFI_percent_Asc_AllBeamsPercent of radiometer samples flagged as RFI (all beams combined; ascending passes only)%
/Radiometer/Rad_RFI_percent_AscDesPercent of radiometer samples flagged as RFI (individual beams)%
/Radiometer/Rad_RFI_percent_AscDes_AllBeamsPercent of radiometer samples flagged as RFI (individual beams)%
/Radiometer/Rad_RFI_percent_DesPercent of radiometer samples flagged as RFI (individual beams; descending passes only)%
/Radiometer/Rad_RFI_percent_Des_AllBeamsPercent of radiometer samples flagged as RFI (all beams combined; descending passes only)%
/Scatterometer/Scat_RFI_percent_AscPercent of scatterometer samples flagged as RFI (individual beams; ascending passes only)%
/Scatterometer/Scat_RFI_percent_Asc_AllBeamsPercent of scatterometer samples flagged as RFI (all beams combined; ascending passes only)%
/Scatterometer/Scat_RFI_percent_AscDesPercent of scatterometer samples flagged as RFI (individual beams)%
/Scatterometer/Scat_RFI_percent_AscDes_AllBeamsPercent of scatterometer samples flagged as RFI (all beams combined)%
/Scatterometer/Scat_RFI_percent_DesPercent of scatterometer samples flagged as RFI (individual beams; descending passes only)%
/Scatterometer/Scat_RFI_percent_Des_AllBeamsPercent of scatterometer samples flagged as RFI (all beams combined; descending passes only)%
LatitudeLatitudedegrees_north
LongitudeLongitudedegrees_east
TimeTimeseconds since 2000-01-01T12:00:00.000Z
USER'S GUIDE
GENERAL DOCUMENTATION
DATA CITATION POLICY
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation Yan Soldo, Paolo De Matthaeis, David Levine. 2018. Aquarius RFI Products. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/AQR00-RFI01

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