TDF-1 flash observation Aug 24UT

Richard Baldridge (RBaldridge@Filss.com)
Tue, 24 Aug 1999 09:38:10 -0700

Continuing flash observations for geosat TDF-1 (NORAD 19621 or  88098A).

AUG 24UT  -  MIDPOINT of flashes at 5:49:30UT +/- 1 minute from N37.272
W121.977.
No period measurements were made last night (still near 29 seconds).
MIDPOINT occurring approximately 9.43 minutes later each night.  (Aug
16UT @ 4:34UT : Aug24UT @ 5:49:30UT)

For the West Coast of the USA, flashes occurring within 3 degrees of the
star 47 Ophiuchi, but sat is drifting slowly westward night-to-night.

Sat is still following previously stated flash pattern (flashes from two
sets of panels).  Total span of time where flashes are naked eye is
approx. 11 minutes, near mag +2 to +3.  
_____________________________________________________________________
APPROXIMATE "LIGHT" CURVE (view with fixed-font like Courier).       |
0=1st set                                                            |
*=2nd set                               (Obviously not to scale)     |
           Double Flashes                                            |
          ___|___                                                    |
MAG      |       |                                                   |
+2       |       | 0                    *    *                       |
              0         0          *               *                 |
+4         0                0  *                      *              |
        0                    *   0                       *           |
+6   0                    *         0                      *         |
  0                    *              0                      *       |
+8                  *                    0                    *      |
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 
TIME(U.T.) 8/24    5:44      5:49:30      5:55                 5:57  |
                    ^           ^          ^                    ^    |
                    |           |          |_ Last of 1st set   |    |
 First of 2nd set___|           |___ EQUAL                      |    |
  1st set at Maximum.                              Last 2nd set_|    |
_____________________________________________________________________|


RICK BALDRIDGE