Nettie La Belle-HamerASF Science Center Manager

Alaska SAR FacilityGeophysical Institute

University of Alaska Fairbanks

ASF Capabilities

• Downlinking

• Processing

• Near Real Time for L1 and L0

• Archiving and Distribution

ASF Satellite Tracking

ASF currently operates two independent tracking systems,– Scientific Atlanta 10m X-band/S-band tracker,

installed to support ERS-1, JERS, and Radarsat acquisitions

– Scientific Atlanta 11.24m X-band/S-band tracker, installed to support ADEOS

ASF Host Controller

ASF utilizes an ASF-designed and built tape recorder management system– schedules tape resources for both tracking systems– manages High Density Digital Recorders (HDDRs)

before, during, and after acquisitions– generates all required metadata for flight agency and

ASF internal processing– permits simultaneous tracker operation, with best

utilization of HDDR resources

ASF Receiving Ground Station

The ASF Receiving Ground System incorporates a tracker scheduling element, which de-conflicts multi-mission requirements, and generates conflict-free schedules for each ASF tracking system

Acquisition Masks of ASF and TSS

Processing at ASF

• Level-1 Processors– Precision Processor– ScanSAR Processor– ASP (Hardware)– Focus– Alaska Interferometric SAR Processor

• Level-0 Processors– Operational system– MAMM system

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Signal Data at ASF

•7x24 facility

•track record for high volume, high quality data processing

Archive holdings as of Oct 2001

R151%

J116%

E122%

E211%

Satellite Seconds of data TB of dataERS-1 4,244,912 56ERS-2 2,058,887 27JERS-1 3,165,045 24RADARSAT-1 10,116,362 126Total 19,585,205 232

Quick Look Delivery Times to NIC Oct 98-Sep 01

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Support for Real World Applications

• Emergency support– for the Coast Guard for images used in

search and rescue of Chinese trawler. (6 November, 2000)

– for urgent data requests from NIC– for the Vice President for images of flooding

• Ice Community support– ASF’s RGPS provides geophysical ice

products to the ice science community.

Back up slides

ASF RGS

The ASF Receiving Ground System currently supports data acquisition to the following tape resources,– Sony ID-1– Ampex DCRSi

Level 1 volume in MB from Sep 96- Oct 01

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MAMM production begins

Quick Look Delivery Times to NIC Oct 98-Sep 01

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