Below is a collection of headlines, notices, and archived newsletters from the Alaska Satellite Facility’s News & Notes. View the latest newsletters below, and for training notices click here.
Thruster anomaly affects Sentinel-1 orbit control
An anomaly in a thruster used for Sentinel-1 orbit positioning control has resulted in the “orbit tube” diameter increasing from 100 meters to 200 meters maximum. The effect of this action on interferometric baselines has been predicted:
“The preliminary conclusion, supported by InSAR experts, is that the perpendicular baseline, a key InSAR performance indicator, will remain within acceptable limits. Burst synchronization at data-take start is not expected to be impacted, and degradation within data-take and as well as reduction of spectral overlap due to crossing orbits are expected to be limited.”
Detailed information is available from ESA:
https://sentinels.copernicus.eu/web/sentinel/-/sentinel-1a-change-in-the-orbit-control-strategy
https://sentinels.copernicus.eu/documents/d/sentinel/esa-eopg-eopgmq-tn-2024-12-increase-of-sentinel-1a-orbital-tube
On Demand Sentinel-1 RTC is now available at 10-m pixel spacing and in dB scale!
Sentinel-1B satellite mission ends
ASF Science Friday series continues August 26
NASA schedules second OPERA workshop
Sentinel-1 images reveal changes in the Earth’s surface over one year
Sentinel-1 InSAR StoryMap
Python search library now available
ASF Celebrates 30 Years of Operations
Dr. Steve Bowman is profiled on the NASA Earthdata website
Mapping Antarctica
ERS Free and Open
