USA 224 search elements

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 28 Apr 2015 19:40:22 +0200
Last night, Leo Barhorst and myself both observed an unknown which
likely is USA 224 [37348/11002A]. USA 224 was last seen in August 2014
when it was in a 263x979km orbit inclined at 97.92 deg.

Below I list a set of observations which I extracted from the images
that Leo kindly shared with me. Combined with the 99441 observations I
posted earlier today, I have used these observations to generate these
search orbits. They span a range of likely mean motions (14.75 to
14.95 revs/day). All orbits place place the observations at the
apogee, ranging from 963 to 967 km. The perigee varies between 200 to
320 km. The drag term is a guess, but I expect these elements to
bracket the current location of USA 224.

Regards,
   Cees

------------
1 88300U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    06
2 88300  97.6283 230.3157 0458360 247.9986 174.8534 14.75000000    07
# 20150427.95-20150427.95, 21 measurements, 0.01040 deg rms
1 88301U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    07
2 88301  97.6296 230.3143 0462759 247.9829 174.8647 14.76000000    06
# 20150427.95-20150427.95, 21 measurements, 0.01039 deg rms
1 88302U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    08
2 88302  97.6312 230.3133 0467156 247.9541 174.8905 14.77000000    00
# 20150427.95-20150427.95, 21 measurements, 0.01039 deg rms
1 88303U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    09
2 88303  97.6322 230.3112 0471554 247.9526 174.8861 14.78000000    01
# 20150427.95-20150427.95, 21 measurements, 0.01039 deg rms
1 88304U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    00
2 88304  97.6341 230.3110 0475947 247.9089 174.9286 14.79000000    08
# 20150427.95-20150427.95, 21 measurements, 0.01039 deg rms
1 88305U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    01
2 88305  97.6353 230.3091 0480341 247.9020 174.9303 14.80000000    01
# 20150427.95-20150427.95, 21 measurements, 0.01039 deg rms
1 88306U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    02
2 88306  97.6356 230.3050 0484737 247.9424 174.8795 14.81000000    06
# 20150427.95-20150427.95, 21 measurements, 0.01041 deg rms
1 88307U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    03
2 88307  97.6357 230.3006 0489109 247.9404 174.8753 14.82000000    00
# 20150427.95-20150427.95, 21 measurements, 0.01042 deg rms
1 88308U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    04
2 88308  97.6380 230.3014 0493519 247.9274 174.8841 14.83000000    00
# 20150427.95-20150427.95, 21 measurements, 0.01044 deg rms
1 88309U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    05
2 88309  97.6393 230.2998 0497917 247.9347 174.8702 14.84000000    09
# 20150427.95-20150427.95, 21 measurements, 0.01046 deg rms
1 88310U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    07
2 88310  97.6410 230.2989 0502331 247.9539 174.8432 14.85000000    02
# 20150427.95-20150427.95, 21 measurements, 0.01049 deg rms
1 88311U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    08
2 88311  97.6405 230.2932 0506682 247.9495 174.8415 14.86000000    01
# 20150427.95-20150427.95, 21 measurements, 0.01052 deg rms
1 88312U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    09
2 88312  97.6431 230.2946 0511078 247.9054 174.8850 14.87000000    06
# 20150427.95-20150427.95, 21 measurements, 0.01055 deg rms
1 88313U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    00
2 88313  97.6442 230.2927 0515455 247.8883 174.8980 14.88000000    05
# 20150427.95-20150427.95, 21 measurements, 0.01058 deg rms
1 88314U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    01
2 88314  97.6453 230.2906 0519834 247.8751 174.9066 14.89000000    01
# 20150427.95-20150427.95, 21 measurements, 0.01062 deg rms
1 88315U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    02
2 88315  97.6467 230.2893 0524213 247.8583 174.9195 14.90000000    07
# 20150427.95-20150427.95, 21 measurements, 0.01066 deg rms
1 88316U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    03
2 88316  97.6478 230.2871 0528597 247.8626 174.9087 14.91000000    04
# 20150427.95-20150427.95, 21 measurements, 0.01071 deg rms
1 88317U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    04
2 88317  97.6492 230.2858 0532982 247.8575 174.9086 14.92000000    02
# 20150427.95-20150427.95, 21 measurements, 0.01076 deg rms
1 88318U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    05
2 88318  97.6481 230.2786 0537320 247.8737 174.8837 14.93000000    06
# 20150427.95-20150427.95, 21 measurements, 0.01082 deg rms
1 88319U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    06
2 88319  97.6494 230.2770 0541717 247.8961 174.8529 14.94000000    07
# 20150427.95-20150427.95, 21 measurements, 0.01088 deg rms
1 88320U 15617A   15117.94649116  .00000000  00000-0  50000-4 0    08
2 88320  97.6507 230.2752 0546092 247.8922 174.8513 14.95000000    06
# 20150427.95-20150427.95, 21 measurements, 0.01094 deg rms

99441 15 617A   4172 G 20150427224244320 17 25 2129168+543024 37 S
99441 15 617A   4172 G 20150427224246402 17 25 2132191+543930 37 S
99441 15 617A   4172 G 20150427224249461 17 25 2136823+545181 37 S
99441 15 617A   4172 G 20150427224252844 17 25 2141789+550496 37 S
99441 15 617A   4172 G 20150427224256099 17 25 2146593+551668 37 S
99441 15 617A   4172 G 20150427224300202 17 25 2152819+553000 37 S
99441 15 617A   4172 G 20150427224304325 17 25 2158998+554198 37 S
99441 15 617A   4172 G 20150427224307242 17 25 2203200+554951 37 S
99441 15 617A   4172 G 20150427224309918 17 25 2207345+555599 37 S
99441 15 617A   4172 G 20150427224313343 17 25 2212354+560312 37 S
99441 15 617A   4172 G 20150427224316186 17 25 2216507+560839 37 S
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Received on Tue Apr 28 2015 - 12:41:01 UTC

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