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Status of a UAV SAR Designed for Repeat Pass Interferometry for Deformation MeasurementsUnder the NASA ESTO sponsored Instrument Incubator Program we have designed a lightweight, reconfigurable polarimetric L-band SAR designed for repeat pass deformation measurements of rapidly deforming surfaces of geophysical interest such as volcanoes or earthquakes. This radar will be installed on an unmanned airborne vehicle (UAV) or a lightweight, high-altitude, and long endurance platform such as the Proteus. After a study of suitable available platforms we selected the Proteus for initial development and testing of the system. We want to control the repeat track capability of the aircraft to be within a 10 m tube to support the repeat deformation capability. We conducted tests with the Proteus using real-time GPS with sub-meter accuracy to see if pilots could fly the aircraft within the desired tube. Our results show that pilots are unable to fly the aircraft with the desired accuracy and therefore an augmented autopilot will be required to meet these objectives. Based on the Proteus flying altitude of 13.7 km (45,000 ft), we are designing a fully polarimetric L-band radar with 80 MHz bandwidth and 16 km range swath. This radar will have an active electronic beam steering antenna to achieve Doppler centroid stability that is necessary for repeat-pass interferometry (RPI). This paper will present are design criteria, current design and expected science applications.
Document ID
20080017925
Document Type
Conference Paper
External Source(s)
Authors
Hensley, Scott (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wheeler, Kevin (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hoffman, Jim (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Miller, Tim (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lou, Yunling (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Muellerschoen, Ron (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Zebker, Howard (Stanford Univ. Palo Alto, CA, United States)
Madsen, Soren (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rosen, Paul (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
June 22, 2004
Subject Category
Geophysics
Meeting Information
Earth Science Technology Conference(Palto Alto, CA)
Distribution Limits
Public
Copyright
Other
Keywords
radar
interferometry SAR
satellites