Astronomers Have Figured Out Clever Tricks to Reduce the Impact of Satellite Trails - by spacewriter
Stark applied the tool to satellite trails across Hubble’s Advanced Camera for Surveys . Each Hubble science observation comes from a collection of multiple exposures on the same celestial target. A satellite crossing the field of view generally appears in one frame, and not the next consecutive frame. About ten percent of HST’s observations today are affected by satellite trails. “The average width I measured for satellites was 5 to 10 pixels,” said Stark.
As it stands, the software tool sums up all the light along every possible straight path across a given HST image. In this way, it identifies and characterizes linear features in an image. This approach combines all the light from a satellite trail, making it “pop out” in the transformed image. This approach works even for those that are very faint in the original image. It joins an extensive catalog of tools that astronomers have used for years to “clean up” HST observations.
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