Data Set Information
DATA_SET_NAME ARECIBO/NRAO VENUS RTLS/GBT 3 DELAY DOPPLER V1.0
DATA_SET_ID ARCB/NRAO-V-RTLS/GBT-3-DELAYDOPPLER-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION This archive contains Earth-based, polarimetric radar image data for Venus collected from 1988 onwards, using the Arecibo Observatory 12.6-cm (2380 MHz) transmitter and receivers at either Arecibo or the Green Bank Telescope in West Virginia. One sense of circular polarization is transmitted, and both senses of the reflected echo are recorded in amplitude and phase. These data have a horizontal spatial resolution of 1-2 km in the highest-resolution mode, and about 8 km in a lower-resolution mode used to increase the signal-to-noise performance for some polarimetric analyses. The first data products archived are complex-valued images of the backscatter from Venus for individual coherent looks five minutes in duration. Up to about thirty such looks for the north and south portions of the planet's disk visible at each inferior conjunction are collected. The maps are in un-calibrated, delay-Doppler format, and thus require additional processing to normalize the echoes to the background noise and convert the spatial sampling to a latitude-longitude format. Once those steps are completed, users may sum the images as they choose to create multi-look (reduced speckle, higher SNR) dual-polarization maps of the surface or Stokes-vector values for polarimetric studies. Future PDS releases may include such calibrated and summed maps produced by the data providers. Please see the document VENUS_RADAR.PDF in the DOCUMENT directory for further details, including information about the data collection and processing.
DATA_SET_RELEASE_DATE 2016-10-10T00:00:00.000Z
START_TIME 1988-06-04T04:39:10.000Z
STOP_TIME 1988-06-06T05:52:28.000Z
MISSION_NAME
MISSION_START_DATE
MISSION_STOP_DATE
TARGET_NAME VENUS
TARGET_TYPE PLANET
INSTRUMENT_HOST_ID NRAO
ARCB
INSTRUMENT_NAME ROBERT C. BYRD GREEN BANK TELESCOPE
RADIO TELESCOPE
INSTRUMENT_ID GBT
RTLS
INSTRUMENT_TYPE RADIO TELESCOPE
NODE_NAME Geosciences
ARCHIVE_STATUS ARCHIVED - ACCUMULATING
CONFIDENCE_LEVEL_NOTE TBD.
CITATION_DESCRIPTION Campbell, B.A., Earth-Based Radar Observations of Venus, ARCB/NRAO-V-RTLS/GBT-3-DELAYDOPPLER-V1.0, NASA Planetary Data System, 2016.
ABSTRACT_TEXT This dataset contains Earth-based, polarimetric radar image data for Venus collected from 1988 onwards, using the Arecibo Observatory 12.6-cm (2380 MHz) transmitter and receivers at either Arecibo or the Green Bank Telescope in West Virginia.
PRODUCER_FULL_NAME BRUCE A. CAMPBELL
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