05004C has manoeuvred to a slightly lower orbit. The observed arc is short - just one rev - but it suggests that C has nearly matched the mean motion of A, temporarily freezing its node crossing lag of A at 47.5 s. Their next manoeuvres could increase their mean motion to around 13.406 rev/d; therefore, until the next observations have been reported, it would be prudent to allow for early arrival of 1 min per day since the epoch of the following elements: NOSS 3-3 (A) 0.0 0.0 0.0 4.0 v 1 28537U 05004A 05056.40614835 .00000011 00000-0 20000-4 0 02 2 28537 63.4380 106.1211 0124054 180.3170 179.7796 13.39823685 03 Arc 2005 Feb 13.41 - 25.43, WRMS residuals = 0.017 deg NOSS 3-3 (C) 0.0 0.0 0.0 4.0 v 1 28541U 05004C 05056.40669853 .00000011 00000-0 20000-4 0 07 2 28541 63.4373 106.2541 0124914 179.7003 180.4118 13.39826347 04 Arc 2005 Feb 25.35 - 25.43, WRMS residuals = 0.011 deg In the orbit determination of 05004C, I held the inclination and rate of decay constant; the resulting elements are realistic, but are subject to improvement through additional tracking. Description of 2-line elements: http://www.satobs.org/element.html 28537 05 004A 2701 G 20050225082516040 17 25 0142094+610344 18 S 28541 05 004C 2701 G 20050225082604600 17 25 0142140+610459 18 S 28537 05 004A 2701 G 20050225101800370 17 25 0132022+700705 87 S 28541 05 004C 2701 G 20050225101843890 17 25 0142648+701313 18 S 28541 05 004C 2701 G 20050225101848770 17 25 0132022+700705 87 S 28541 05 004C 2701 G 20050225102005620 17 25 2308977+625005 37 S What these numbers mean: http://www.satobs.org/position/IODformat.html Site 2701: 43.68764 N, 79.39243 W, 230 m Ted Molczan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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