Aquarius Celestial Sky Microwave Emission Map Ancillary Dataset V1.0

Aquarius Celestial Sky Microwave Emission Map Ancillary Dataset V1.0
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DescriptionThis datasets contains three maps of L-band (wavelength = 21 cm) brightness temperature of the celestial sky ("Galaxy") used in the processing of the NASA Aquarius instrument data. The maps report Sky brightness temperatures in Kelvin gridded on the Earth Centered Inertial (ECI) reference frame epoch J2000. They are sampled over 721 Declinations between -90 degrees and +90 degrees and 1441 Right Ascensions between 0 degrees and 360 degrees, all evenly spaced at 0.25 degrees intervals. The brightness temperatures are assumed temporally invariant and polarization has been neglected. They include microwave continuum and atomic hydrogen line (HI) emissions. The maps differ only in how the strong radio source Cassiopeia A has been included into the whole sky background surveys: 1/ TB_no_Cas_A does not include Cassiopeia A and reports only the whole Sky surveys. 2/ TB_Cas_A_1cell spread Cas A total flux homogeneously over 1 map grid cell (i.e. 9.8572E-6 sr). 3/ TB_Cas_A_beam spreads Cas A over surrounding grid cells using a convolution by a Gaussian beam with HPBW of 35 arcmin (equivalent to the instrument used for the Sky surveys). Cassiopeia A is a supernova remnant (SNR) in the constellation Cassiopeia and the brightest extra-solar radio source in the sky at frequencies above 1.
Dataset TypeOPEN
MeasurementAtmosphere > Atmospheric Radiation > Brightness Temperature
Processing Level3
CoverageRegion: Global
Northernmost Latitude: 90 degrees
Southernmost Latitude: -90 degrees
Westernmost Longitude: -180 degrees
Easternmost Longitude: 180 degrees
Time Span: 2011-Sep-01 to 2015-Jun-07
ResolutionSpatial Resolution: 0.25 degrees (Latitude) x 0.25 degrees (Longitude)
Temporal Resolution: 4 Year
ProjectionType: Gridded
Ellipsoid: Earth Centered Inertial (ECI) reference frame
Latency hours
Name: Aquarius SAC-D (Aquarius_SAC-D)
Orbit Period: 98 minutes
Inclination Angle: 98 degrees
Ascending Node: 1970-Jan-01 00:00:00
Name: Aquarius Radiometer (AQUARIUS_RADIOMETER)
Swath Width: 390 km
Description: Launched in 2011 the 3 Aquarius radiometers meet very exacting requirements for low noise and calibration stability. This makes them about an order of magnitude more accurate than any radiometer ever used before for remote sensing of the earth. Aquarius measures in the microwave range at 1.413 GHz (+/- 25MHz).

Data ProviderCreator: Emmanuel Dinnat
Release Place: Goddard Space Flight Center, 8800 Greenbelt Rd.; Greeenbelt, Md., 20771
Release Date: 2018-Jul-04
Keyword(s)Aquarius, polar, sun-synchronous, Galaxy, Celestial Sky map, Microwave, brightness temperature, L-band, 21 cm, CONAE, argentina
Persistent IDPODAAC-AQR00-SKY01
Questions related to this dataset? Contact
User's Guide
Publication on Aquarius Celestial Sky Map Product
User's Guide
Aquarius Celestial Sky Map Product User's Guide
Additional Sites
Aquarius/SAC-D Mission Website
NASA Aquarius/SAC-D mission website
Citation Emmanuel Dinnat. 2018. Aquarius Celestial Sky Microwave Emission Map Ancillary Dataset V1.0. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at

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