Flight demonstration of image fix-taking with SAR
- Draper (Charles Stark) Lab., Inc., Cambridge, MA (United States)
- Sandia National Labs., Albuquerque, NM (United States)
Airborne Synthetic Aperture Radar (SAR) uses coherent radar processing techniques to image ground reflectors. After processing, range and Doppler can be associated with any feature of interest in the final image. The location of any imaged feature can be estimated using a Kalman filter to combine these data with GPS and INS navigation data. This paper reports on the results of a flight demonstration of such a system, using an airborne SAR developed at Sandia. Collected data consisted of multiple SAR images containing surveyed reflectors. GPS/INS output taken aboard the aircraft, and GPS output recorded at surveyed ground stations. These data were post-processed at Sandia and at Draper Laboratory to obtain a navigation solution based on differential GPS and to demonstrate SAR fix-taking performance. This study successfully demonstrates accuracy of about 1 meter for fixing the position of a point imaged with SAR from an airborne platform. Because differential GPS was used, the navigation error was of about the same magnitude as the SAR range measurement error. Consequently, the measurements served primarily to fix the SAR image rather than to update the navigator.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 7368548
- Report Number(s):
- SAND-93-0779C; CONF-9306185-1; ON: DE93016499
- Resource Relation:
- Conference: 49. Institute of Navigation annual meeting, Cambridge, MA (United States), 21-23 Jun 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
High accuracy integrated global positioning system/inertial navigation system LDRD: Final report
An Integrated Navigation System using GPS Carrier Phase for Real-Time Airborne Synthetic Aperture Radar (SAR)
Related Subjects
47 OTHER INSTRUMENTATION
SYNTHETIC-APERTURE RADAR
DATA ANALYSIS
FLIGHT TESTING
AIRCRAFT
CALIFORNIA
EXPERIMENTAL DATA
GEODETIC SURVEYS
IMAGE PROCESSING
IMAGES
NAVIGATION
PERFORMANCE TESTING
POSITIONING
DATA
DEVELOPED COUNTRIES
GEOPHYSICAL SURVEYS
INFORMATION
MEASURING INSTRUMENTS
NORTH AMERICA
NUMERICAL DATA
PROCESSING
RADAR
RANGE FINDERS
SURVEYS
TESTING
USA
540210* - Environment
Terrestrial- Basic Studies- (1990-)
440700 - Geophysical & Meteorological Instrumentation- (1990-)