I think to make any case for continuing TLEs we need to be realistic and make it on the basis of what essential purposes it serves. We may be interested and enjoy watching Iridium flares - I certainly do and would be very disappointed to lose such predictions- but is that going to convince those responsible that it is of such scientific or strategic importance that the TLEs need to continue to be available, bearing in mind that the reasons for dispensing with them are presumably strategic in the context of recent world events? I suggest we concentrate on making a case based on considerations of reasons why maintenance of TLE distribution is of scientific and strategic importance. One that springs to mind is the history of Columbia where expert observation proved invaluable - yes we have things like J-PASS but the email predictions I get from NASA do not even have our daylight saving correct- they show the same dates for changes as Australia's and we change on different days! To be sure of accurate and up to date tracking of shuttles and the ISS we need to have up to date TLEs, and it is also relevant to the amateur radio projects which are an integral part of the ISS program. Maybe the issue of decay prediction and observation might be another issue on which a case could be made? Also if there is any external value to the observation of unknowns and recovery of "missing" satellites this could help our case. I don't profess expertise on this subject but I put these thoughts out for consideration and intelligent discussion (of which there has already been a lot on the subject!) Robert Holdsworth Wainuiomata New Zealand > > I was able to id and unknown in FOV of #26906 at 23.45.03 UTC as Cosmos 1816 > #17359. It was a first time sighting for me on the Cosmos. I used IDSat, > ObsReduce, Skymap, and Kevin Fetter's satellite.tle . Being able to id > unknowns has always been a fun part of this hobby. How will I continue to ID > sats if someone's alldat.tle file is not available? Also just sighting sats > for the 1st time has been an objective of mine. The Iridiums also need to be > kept track of to continue flare predictions. I do hope there is a solution > if the tle's from OIG become unavailable. > > Lat 39.4707 Lon -79.3388 Alt 2573 ft -5 UTC > > > ----------------------------------------------------------------- > To unsubscribe from SeeSat-L, send a message with 'unsubscribe' > in the SUBJECT to SeeSat-L-request@satobs.org > List archived at http://www.satobs.org/seesat/seesatindex.html > > ----------------------------------------------------------------- To unsubscribe from SeeSat-L, send a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@satobs.org List archived at http://www.satobs.org/seesat/seesatindex.html
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