Alaska Satellite Facility

ASF home graphic dish with satellite above and aurora in the sky


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:

ASF 25th-Anniversary Celebration

The celebration of ASF’s quarter-century milestone took place at an open house in early June 2016. The day featured an ...
Read More

2006 Anniversary Edition – Message from the ASF Director

10-meter antenna construction underway – Photographed by Jim Coccia Nettie La Belle-Hamer – Director, ASF What is now the Alaska ...
Read More

2006 Anniversary Edition – Global Forest Mapping with JERS-1 SAR

The Japanese Aerospace Exploration Agency (JAXA; formerly known as NASDA) successfully launched the Japanese Earth Resources Satellite (JERS-1, nicknamed FUYO) in late 1992 into a ...
Read More

2006 Anniversary Edition – Interferometric Synthetic Aperture Radar: Building Tomorrow’s Tools Today

A synthetic aperture radar (SAR) system transmits electromagnetic (EM) waves at a wavelength that can range from a few millimeters to tens of centimeters. The ...
Read More

2006 Anniversary Edition – ALASKA SAR FACILITY: In the Beginning

A site for the ASF had to be found and the obvious choice was to locate it in the Elvey Building, the home of the ...
Read More

2006 Anniversary Edition – A Brief History of the RADARSAT-1 Antarctic Mapping Project

The RADARSAT-1 Antarctic Mapping Project (RAMP) was conceived in the early 1980’s by Stan Wilson, Bob Thomas, and Bill Townsend. The idea developed as part ...
Read More

2006 Anniversary Edition – Sea Ice Motion: Science Driving U.S. SAR Research

The ability to derive quantitative estimates of fine-scale ice motion and deformation from pairs of Seasat SAR images provided the primary scientific basis for implementing ...
Read More
Northwest Passage sea ice contrasts with the coast of Baffin Island, Canada, in this ALOS-PALSAR image taken 8 March 2011. © JAXA, METI 2011

2006 Anniversary Edition – From Airborne to Spaceborne: Reflections on the Alaska Satellite Facility by a User

The first radar images that I ever saw were those in a publication that is, or should be, familiar to anyone associated with ASF - ...
Read More