Data Set Information
DATA_SET_NAME NASA DC-8 EARTH AIRSAR RESAMPLED RADAR IMAGES V1.0
DATA_SET_ID NDC8-E-ASAR-4-RADAR-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : AIRSAR is the Jet Propulsion Laboratory's airborne polarimetric SAR that operates at C (5.66 cm), L (23.98 cm), and P (68.13 cm) wavelengths in a polarimetric mode (Zebker et al., 1987). AIRSAR acquires data that can be processed to backscatter image formats with range and azimuth resolutions of approximately 20 meters. The pixel values are expressed in radar backscatter cross section as 32-bit numbers. The cross section is the area of a half sphere that would scatter the amount of power received by the antenna. AIRSAR flew on NASA's DC-8 in May 1988 and acquired data at multiple incidence angles and azimuths over selected geological targets in the southern Mojave Desert of California (Arvidson et al., 1990). The AIRSAR data consist of radar images in C, L, and P frequencies for the Pisgah volcanic field, the adjacent Lavic Lake Playa, and the Kelso Dune Field. The data are in both HH (horizontal (linear) wave transmit, horizontal receive) and HV (horizontal transmit, vertical receive) polarizations. Three incidence angle views are included for the Pisgah-Lavic site. Thus there are 6 Kelso scenes and 18 Pisgah-Lavic scenes. The intent is to provide radar backscatter image views over a variety of system and observations parameters for sites that can be visited and that range from rough aa flows, mantled pahoehoe flows, relatively smooth playa surfaces, to a complex dune field. Data are presented in along track - cross track coordinates, using slant range cross track dimensions. Processing Level Id : 4 Software Flag : N Processing Start Time : 1988-06-02 Processing Stop Time : 1989-12-31 Parameters : Data Set Parameter 'RADAR BACKSCATTER CROSS SECTION' ---------------------------------------------------- Cross section values are dimensionless and correspond to the projected area of a sphere that would produce the observed backscattered power, divided by the scattering area, i.e. the pixel area. Data Set Parameter Name : RADAR BACKSCATTER CROSS SECTION Data Set Parameter Unit : DIMENSIONLESS Sampling Parameter Name : PIXEL Sampling Parameter Unit : METER Minimum Sampling Parameter : N/A Maximum Sampling Parameter : N/A Sampling Parameter Resolution : 25 Sampling Parameter Interval : 9 Minimum Available Sampling Int : 6 Noise Level : UNK Source Instrument Parameters : Instrument Host ID : NDC8 Data Set Parameter Name : RADAR BACKSCATTER CROSS SECTION Instrument Parameter Name : RADAR ECHO POWER Important Instrument Parameters : 1 Measurement Information : Atmospheric Conditions ---------------------- NOT APPLICABLE Source ------ The radar observations were made using the airborne polarimetric SAR on NASA's DC-8 aricraft. See the data set description. Calibration Standard -------------------- The response from trihedral corner reflectors is used to calibrate the radar signal. Wavelength Calibration ---------------------- Signals are derived from a stable local oscillator source operating at the L-band center frequency (1250MHz). The P-band center frequency is derived from this source by down-converting, while the C-band center frequency is derived by up-converting. Processing : N/A
DATA_SET_RELEASE_DATE 1990-06-15T00:00:00.000Z
START_TIME 1988-06-02T08:10:05.000Z
STOP_TIME 1988-06-02T10:08:13.000Z
MISSION_NAME GEOLOGIC REMOTE SENSING FIELD EXPERIMENT
MISSION_START_DATE 1989-07-01T12:00:00.000Z
MISSION_STOP_DATE 1989-10-31T12:00:00.000Z
TARGET_NAME EARTH
TARGET_TYPE PLANET
INSTRUMENT_HOST_ID NDC8
INSTRUMENT_NAME AIRSAR
INSTRUMENT_ID ASAR
INSTRUMENT_TYPE RADAR
NODE_NAME Geosciences
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Overview : Because of uncertainties in calibration procedures, absolute values are less well known than relative cross section values.
CITATION_DESCRIPTION Plaut, J. J., NASA DC-8 EARTH AIRSAR RESAMPLED RADAR IMAGES V1.0, NDC8-E-ASAR-4-RADAR-V1.0, NASA Planetary Data System, 1990
ABSTRACT_TEXT AIRSAR is the Jet Propulsion Laboratory's airborne polarimetric SAR that operates at C (5.66 cm), L (23.98 cm), and P (68.13 cm) wavelengths in a polarimetric mode (Zebker et al., 1987). AIRSAR acquires data that can be processed to backscatter image formats with range and azimuth resolutions of approximately 20 meters. The pixel values are expressed in radar backscatter cross section as 32-bit numbers. The cross section is the area of a half sphere that would scatter the amount of power received by the antenna.
PRODUCER_FULL_NAME JEFFREY J. PLAUT
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