Updated elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Mon Jul 16 2012 - 16:51:33 UTC

  • Next message: Tony Beresford: "satobs july 16 @ 8597"

    Alberto Rango and Scott Tilley made new observations last night of NOSS object 76038D.
    
    1 08836U 76038D   12197.82516730  .00009853  00000-0  61500-3 0    04
    2 08836  63.2905 217.1216 0877264 100.9156 269.1740 13.65793116    09
    
    Mike Waterman recovered IGS-1B last night. These are same rough elements I posted last night. Allow at least 1 min
    prediction time error tonight.
    
    1 27699U 03009B   12197.87344668  .00483468  00000-0  10075-2 0    02
    2 27699  97.0826 262.6078 0007405 153.7723 206.3932 15.98991075    01
    
    Russell Eberst reported a new position of IGS-R2.
    
    IGS-R2                                                   459 X 460 km
    1 30586U 07005A   12198.03958520  .00008386  00000-0  25175-3 0    08
    2 30586  97.3958 323.5039 0001158 109.8688 250.2680 15.34471990    01
    Arc 20120709.4-0716.05 WRMS resid 0.011 totl 0.003 xtrk
    
    Kevin Fetter managed to recover the faint 10062H, running more than 3 min late relative my search TLEs. Its period is a
    bit higher than reported to the U.N., which was the basis for the search TLE. I arrived at the following after several
    analyses. I adjusted the inclination slightly to satisfy the initial RAAN constraint (140.1045 deg at epoch
    10324.13449), and allowed the remaining elements to vary: 
    
    STPSat 2 HAPS                                          1196 X 1430 km
    1 37229U 10062H   12198.15281439  .00000013  00000-0  50000-4 0    02
    2 37229  72.0080 256.2014 0152162 352.7894   7.0977 12.86543957    07
    Arc 20120715.15-0716.16 WRMS resid 0.024 totl 0.015 xtrk
    
    Predictions tonight should be fairly precise in time, and within 0.2 deg cross-track, or so. After a few more
    observations have been made, the elements will settle down to their correct values, and I will drop the initial RAAN
    constraint.
    
    Russell and Kevin added observations of IGS 7A. Initially, I fit only the July 12-16 arc, but I noticed that the
    residuals of that result - relative Russell's Mar 20 UTC observations - were just 5 s time and few hundredths of a
    degree cross-track, so I extended the arc, with little effect on the elements.
    
    IGS 7A                                                   503 X 517 km
    1 37954U 11075A   12198.09926076  .00000000  00000-0  00000-0 0    05
    2 37954  97.5197 269.8670 0010529 310.4530  49.5784 15.17603387    07
    Arc 20120320.88-0716.11 WRMS resid 0.057 totl 0.022 xtrk
    
    Ted Molczan
    
    
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