Re: Question on #12986 Searches

Ron Lee (ronlee@pcisys.net)
Wed, 14 May 1997 19:57:58 -0600 (MDT)

>You could "simulate" this by changing the time of epoch by a
>minute or two and seeing where the resulting prediction was.
>
>This is the "EW" output from Quicksat.  :-)
>
>(But you probably should not use Quicksat to predict for a
>very high drag object.  On the other hand, very few programs
>work very reliably.)
>
>Mike
>

I subtracted 4 mins from an elset which I think will make the object
early.  It ended up EAST of the predicted location.

Adding 4 minutes, or making it late (I think) moves the satellite
west of the predicted position.  

Both seem opposite to what I expected.  Included are the elsets I used

SL-6 r2       135.2   4 min early               10070 x 88 km
1 12985U 81113D   97135.24001011  .23916375  10479-1  12617-2 0 99009
2 12985  62.2123 105.2144 4355878 265.0653  45.4502  7.07968464116670
SL-6 r2       135.2   norm                      10070 x 88 km
1 12986U 81113D   97135.24278788  .23916375  10479-1  12617-2 0 99009
2 12986  62.2123 105.2144 4355878 265.0653  45.4502  7.07968464116670
SL-6 r2       135.2   4 min late                10070 x 88 km
1 12987U 81113D   97135.24556566  .23916375  10479-1  12617-2 0 99009
2 12987  62.2123 105.2144 4355878 265.0653  45.4502  7.07968464116670


Ron