>I wonder how reliable the latest of these TRMM elsets is, on day >00022? The drag term is a full order of magnitude larger than >... >1 25063U 97074A 00022.26301792 .01234510 00000-0 74939-2 0 2440 >2 25063 34.9883 114.1185 0004108 295.1161 63.3849 15.74011124123838 >TRMM >1 25063U 97074A 00020.86822436 .00088170 00000-0 57889-3 0 2430 >2 25063 34.9880 123.5957 0001128 290.4556 69.6030 15.74456777123615 ... Since e has increased by 0003 and MM decreased by .0044 (corresponding to an apogee rise of about 4 km) there was probably a maneuvre in between. I think TRMM does that. In cases like this, with no significant change in perigee, it is usually better to set the drag terms to (an average of) recent values. One exception can be the negative drags of Iridiums and other satellites, that shortly after launch start a slow climb to operational altitude by frequent small adjustments. In these cases a 'bad' elset can work better over several days. -- bjorn.gimle@tietotech.se (office) -- -- b_gimle@algonet.se (home) http://www.algonet.se/~b_gimle -- -- COSPAR 5919, MALMA, 59.2615 N, 18.6206 E, 33 m -- -- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m -- -- SeeSat-L / Visual Satellite Observer Home Page found at -- -- http://www2.satellite.eu.org/satintro.html -- ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
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