Search elements for May 12 VAFB Titan IV launch

Ted Molczan (
Thu, 9 May 1996 18:20:24 -0400

Below are search orbits for the VAFB Titan IV launch scheduled for
12 May 1996. The elements are for the Titan's final stage, based
on an NOSS payload or a Lacrosse payload. The epoch is at 19:00 UTC,
the start of the 4 hour launch period.

The elements are based on the NOSS 2-2 and Lacrosse 2 final stages.
I used real elements from not long after launch, and precessed both
the RAAN and argument of perigee back to the time of launch. I also
adjusted the mean motion and eccentricity to allow for the accumulated
effects of drag.

Please note that these elements are not intended to predict the 
position of the object in its orbit. They merely define its size,
shape and orientation with respect to the Earth. Perhaps someone else
would like to take a stab at modifying the epoch and mean anomaly
to make the elements predictive.

If the launch is delayed, then the RAAN will have to be rotated at the 
rate of +15.041 deg/h.

Of course it is entirely possible that some other payload will be
launched, or that a different transfer orbit will be used. NOSS 2-1
and NOSS 2-2 had very different initial orbits and manoeuvres.

Happy hunting!

NOSS 2-3 r       9.8  3.0  0.0  5.0
1 80000U 80000  A 96133.79166667  .00000000  00000-0  00000-0 0    09
2 80000  63.4175 235.3130 0291700 163.0000   0.0000 15.33000000    04
Lacrosse 3 r     9.8  3.0  0.0  5.0
1 80001U 80001  A 96133.79166667  .00000000  00000-0  00000-0 0    01
2 80001  67.9810 231.5430 0187200 179.0000   0.0000 15.06000000    07

Note - for NOSS payload triplets, change the rocket's mean motion to 
13.4, and its eccentricity to zero. For the Lacrosse payload, change 
the rocket's mean motion to 14.66, and its eccentricity to zero.

end of message