>I did not run a differential correction; instead I varied the mean motion to >produce a close fit to the observations. Also, I added a bstar decay term >for the benefit of SGP4 users; however, at this time both decay terms are >guesses. > They are still guesses, but actually ELCOR+VEC2TLE quickly converged to an elset very similar to USA 116. Residuals .02/.03/.02/.06/.05 degrees : *Apogee Height: 969 km Semimajor Axis: 7018.3223 km Perigee Height: 312 km Orbital Period: 97.4387 min *Note: Heights are Relative to Mean Equatorial Earth Radius (6378 km) Ascending Node Two-Line Elements: USA 129 15.0 3.0 0.0 5.1 v 1 24680U 96072 A 99088.87921223 .00013296 00000-0 25676-3 0 05 2 24680 98.0955 152.2938 0464212 351.9544 7.4395 14.78751408 01 3 99 03 29 21 21 35.71 01 30.57 +58.8431 1950 1 3 99 03 29 21 22 01.41 00 42.42 +54.9817 1950 1 5 99 03 30 20 04 20.54 13 49.12 +21.2808 2000 1 5 99 03 30 20 04 58.26 14 34.77 +32.4672 2000 1 5 99 03 30 20 05 58.43 16 19.55 +46.4217 2000 1 0 -- bjorn@tt-tech.se (office) b_gimle@algonet.se (home) -- -- http://www.algonet.se/~b_gimle -- -- COSPAR 5918, 59.298 N, 18.104 E, 55 m -- -- SeeSat-L / Visual Satellite Observer Home Page found at -- -- http://www.satellite.eu.org/satintro.html --