I derived the following from observations by Daniel Deak, Russell Eberst, Alberto Rango and Mike Waterman, received to this moment: Arc 2003 Apr 28 - 29 UTC: IGS 1A 0.0 0.0 0.0 5.7 v 1 27698U 03009A 03119.89057557 .00010000 00000-0 39035-3 0 01 2 27698 97.4024 191.8946 0001808 169.5551 190.5725 15.25946589 00 WRMS residuals = 0.007 deg Arc 2003 Apr 29 - 30 UTC: IGS 1B 0.0 0.0 0.0 3.2 v 1 27699U 03009B 03120.06136549 .00010000 00000-0 39063-3 0 03 2 27699 97.4104 191.9754 0004739 145.8241 214.3304 15.25913313 04 WRMS residuals = 0.035 deg I no longer believe that my epoch 3117.85770393 elset of IGS 1A is reliable. IGS 1B has manoeuvred lower, to more nearly match the mean motion of IGS 1A. Their orbital periods now differ by about 0.12 s, with IGS 1B leading 1A by 37.3 min. I have revised the standard magnitude of both satellites, using all of Russell Eberst's observations through April 30. Ted Molczan ----------------------------------------------------------------- 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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