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Complete Data Format Document
|AIRSAR Data Modes|
POLSAR Data Operation Mode
In POLSAR mode, fully polarimetric data are acquired at all three frequencies
in P-, L-, C-band for 40 Mhz or 20 Mhz. The
L-band also provides 80 MHz bandwidth data.
Fully polarimetric means that radar waves are transmitted and received in
both horizontal (H) and vertical (V) polarizations.
POLSAR data are sensitive to the geometry (including vegetation) and dielectrical properties (water content) of the
TOPSAR Data Operation Mode
In TOPSAR mode, AIRSAR collects interferometric data using C- and L-band vertically-displaced antenna pairs to produce digital elevation models (DEM's). The radars which are not being used for interferometry (P-band for XTI2 or P-band and L-band for XTI1) collect quad-pol data co-registered with the C-band DEM. Interferometric data can be collected in "ping-pong" mode, where each antenna is used alternately for transmit and the effective baseline is doubled, and in "common-transmitter" mode where only one antenna is used for transmit.
ATI Data Operation Mode (Experimental)
Data collected in the along-track interferometry (ATI) mode can be used
to measure ocean current velocities.
Two pairs of antennas, one C-band and one L-band, separated along the
body of the plane, are used to collect ATI data.