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SatTrackCam Leiden (b)log

PAN (NEMESIS 1) is on the move again

14 Sep 2021, 21:26 UTC
PAN (NEMESIS 1) is on the move again
(200 words excerpt, click title or image to see full post)

Pan on August 8/9, 2021, imaged from Leiden. Click image to enlargeFive years ago, in 2016, I wrote a long article in The Space Review titled "A NEMESIS in the sky: PAN, Mentor 4 and close encounters of the SIGINT kind". The primary subjects of that article were two SIGINT satellites: PAN (Nemesis 1) and Mentor 4.In the article, I discussed what we had observed and deduced about PAN as amateur trackers, to what had been recently revealed about PAN by leaked documents from the Snowden files.In the article I documented the frequent movements of PAN (2009-047A): for four years between its launch in September 2009 and mid 2013, PAN, very unusual for a geosynchronous satellite, was roving from location to location, each time being put close to a satellite for commercial satellite telephony. For information on the "why" of that, and the larger context of it (a new kind of SIGINT information gathering), I refer to the earlier mentioned Space Review paper which goes into details.Mid-2013, four years after launch, the frequent relocations stopped. For 8 years, the position of PAN remained stable in longitude near 47o.7 E. It's roving days, snooping around and sniffing other satellites, were over. ...

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