SEASAT Synthetic Aperture RadarEntry ID: SEASAT_SAR
Abstract: Seasat was launched on June 28, 1978 carrying the first imaging Synthetic
Aperture Radar (SAR) system used as a scientific sensor from earth orbit. A SAR
antenna (2m x 10m) was mounted on the spacecraft with its boresight oriented at
a 20 degree angle from the vertical direction, pointing right of the flight
path. The antenna beam measured approximately 6 degrees in elevation and 1
degree in ... azimuth. The radar footprint on the Earth's surface (within the 3 dB
beam contour) measured approximately 100 km by 15 km. The received radar echoes
were telemetered to ground receiving stations over an analog data link. This
signal was digitized and recorded on a 120 Mbits/sec High Data Rate Recorder.
The signal was processed into high resolution imagery by a ground SAR
processor. The resolution of the Seasat SAR images is about 25m by 25m (in
range and azimuth). The SAR image is a measure of the radar backscatter of the
targets on the ground and can be utilized for Geologic Mapping, Hydrologic
Applications, Crop Discrimination, Oceanographic Monitoring and Polar Ice
The list of Seasat-1 products available at ESA is:
1) DIGITAL PRODUCTS:
2001 Non-SAR (Altimeter, Scatterometer, Scanning
Radiometer, Visible Infrared Radiometer)
Individual Sensor Data Records,
up to 10 passes, different sensors and days,
2002 SAR (Synthetic Aperture Radar) CCT in CCRS-MDA
format, 100 km in range,
6 x 15 km in azimuth, set of 6CCT.
2003 as 2002 but on 2 CCTs at 6250 bpi.
2101 SAR Image CCT in family format, digitally
processed, source DLR,
95 km in range, 74 km in aximuth, four looks,
set of 4 CCTs, each
about 25 km in range, 74 km in azimuth
2102 SAR image CCT in MDA format digitally
processed, source DLR, 60
km in range, 40 km in azimuth, four looks, per
CCT (no further
2103 SAR range compressed data CCT, digitally
processed, source RAE. Area,
number of looks, resolution variable, per CCT.
2104 SAR final image CCT, digitally processed,
source RAE. Area, number of
looks, resolution variable, per CCT.
2) PHOTOGRAPHIC PRODUCTS
FROM OPTICAL PROCESSING
2201 Survey processed SAR film - up to 1500mm long,
2 films containing four
2202 Full resolution SAR film - up to 1200mm long, 2
films containing four
FROM DIGITAL PROCESSING
2301 240mm print - source DLR or RAE (DLR: 95 km in
range, 74 km in azimuth
or 60 km in range, 40 km in azimuth. RAE:
covered area variable).
2302 240mm film positive - source DLR or RAE
2303 240mm film negative - source DLR or RAE
2304 480mm print - source DLR
2305 480mm film positive or negative, source DLR.
2401 set of 14 microfiches containing the Catalogue
and 505 SAR scenes -
source DLR (60 x 40 km).
Start Date: 1978-07-11Stop Date: 1978-10-10
Data Set Progress
Role: DIF AUTHOR
Phone: +39 06 94180777
Fax: +39 06 94180292
Email: eohelp at esa.int
ESA/ESRIN Via G. Galilei
Postal Code: 00044
Colwell, Robert (Editor-in-Chief), 'Manual of
Remote Sensing: Second Edition', Volumes I and II, American Society of
Curlander, J., et al., 'Geometric Registration
and Rectification of Spaceborne SAR Imagery,' Proceedings of the
1982 Geoscience and Remote Sensing Symposium, Munich, Germany, June 1982.
Pravdo, S., et al., 'Seasat Synthetic Aperture
Radar User's Manual,' JPL Publication 82-90, March 1, 1983.
SAR Applications Workshop. Proceedings of a ESA
Workshop held at Frascati, Italy. 16-18 September 1986. ESA, 1986.
Wu, C., et al., 'An Introduction to the Interim
Digital SAR Processor and the Characteristics of the Associated
Seasat SAR Imagery,' JPL Publication 81-26, April 1, 1981.
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Creation and Review Dates
Last DIF Revision Date: 2006-05-05