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Polar Radar for Ice Sheet Measurements

   
curved ice line
jagged ice
Home>PRISM Update >Overview 2004- PRISM SAR
 


Radar Overview 2004: PRISM SAR

Features

This radar is designed to produce two-dimensional maps of bedrock properties. It was designed specifically to help scientists look at: a) bedrock roughness and b) presence and location of water channels in the ice.

Modes of Operation

Monostatic Operation
One receiver is colocated with the transmitter and operates in the traditional SAR mode.
illustration
Bistatic Operation
The other receiver is located 4 km from the transmitter and uses digital beam-forming with a synthetic array.
illustration

System Specifications

Band 1
Band 2
Band 3
Units
PRF
5000
5000
5000
Number of Samples
7500
7500
7500
Number of Coherent Integrations
1000
1000
1000
Center Frequency
80
150
350
MHz
Bandwidth
10
20
40
MHz
Noise Figure
1.43
1.43
1.43
dB
Loop Sensitivity
203
203
203
dB

 

System Overview

 

 

System In Action

Four-element TEM Horn Antenna Array
tucker with horn array behind
 
Log-Periodic Antennas
tucker with antennas to side

 

Results

backscatter image

Magnitude image (dB) of basal backscattering from 150 MHz, HH pol through 3 km thick ice. Along-track resolution is 12 m (500 m aperture) and cross-track resolution is 30-15 m (range dependent).

 

 


PRISM © 2002, 2003 is brought to you by
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National Science Foundation University of Kansas
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NASA
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Kansas Technology Enterprise Corporation
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University of Kansas