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FastScan

FastScan is a satellite ground system that processes incoming real-time data from a satellite downlink and produces real-time images. Array developed the system under contract with the Canada Centre for Remote Sensing (CCRS). The CCRS uses FastScan for RADARSAT processing at the Prince Albert and Gatineau satellite receiving stations.

Array first shipped FastScan as a processor for all of the RADARSAT modes, including ScanSAR. We then extended ScanSAR to support processing for ERS, JERS-1 Synthetic Aperture Radar (SAR) satellites and optical satellites, such as Spot, Landsat, and NOAA.

Copyright CSA/ASC,1997
RADARSAT Image received by RADARSAT: CCRS/CCT on
April 3, 1997 at 8:59:56 GMT
Processed by: Array Systems Computing Inc.'s FASTSCAN

Fastscan's advanced features offer significant benefits:

• Ingest data up to 200 Mbps - FastScan can read data from standard High Density Recorders or in real-time from a bit synchronized satellite downlink.
• Directly capture data - The system archives the frame synchronized raw data to a RAID in real-time.
• Preview data sets - Operators can preview data sets using a real-time Moving Window Display (MWD). The MWD supports the following capabilities:
• All modes of RADARSAT, including ScanSAR, ERS, JERS, SPOT, LANDSAT, etc.
• Real-time processing and display
• Automatic cloud cover assessment
• Radiometric and Geometric Correction/Mosaic Building
• Real-time survey of all acquired imagery (to detect features of interest)
• Annotate time/orbital information - FastScan generates data quality reports and catalogues automatically. The system assesses and reports the quality, presence, magnitude and error locations of incoming data.
• Provide an interface to the ground station raw data archive - FastScan archives real-time MWD images and JPEG compressed browse image quality scenes. Data can be transcribed from the RAID to any standard SCSI compatible device, such as DLT, Exabyte or Digital Tape Format (DTF) tape media.

Benefits

FastScan's innovative features provide the following benefits:

• Ice forecasters and disaster relief workers have immediate access to quality data for tactical decision making.
• Users can review archived data in real-time to select images for further analysis.
• Ground station operators can identify problems quickly by viewing satellite imagery in real time.
• Users can automate ground station reception, therefore High Density Digital Tapes (HDDTs) are no longer needed for data reception.