JE9PEL, Mineo Wakita wrote at 20:40:12 +0900, 16 Jul 2002:

I had noticed that MA of WiSP3215 (GSC2.03) was less than 
the valid value. MA for AO-40 was about 126 slow as below.


AO-40        UTC       P3T   WinTrak   WiSP
19 Nov 2000, 01:22      23      23     153    (153+126-256= 23)
21 Nov 2000, 02:30      63      63     193    (193+126-256= 63)
28 Nov 2000, 08:39     250     250     124    (124+126=250)
02 Dec 2000, 01:12     120     120     250    (250+126-256=120)
02 Dec 2000, 07:13     250     250     124    (124+126=250)
02 Dec 2000, 19:34       5       5     135    (135+126-256=5)


Is already available an updated WiSP version or update/FAQ that
corrects the defect of AO-40 and the other satellites MA ?



HB9OAB, Franco Borsa wrote at 14:11:14 +0200, 16 Jul 2002:

Thanks for the added one of information.
However the difference on my computer with real position 'MA' of AO40
is of approximately -10MA.  Attention to update all the programs used
for the test with the same keps.

The WISP problem is that it calculates 0/256 in descendent position on
the Equator and not to the perigee.

Thanks for eventual info of a UPDATE of WISP that corrects the bug!

73's  hb9oab@amsat.org
AO40/SAT home site at: www.wlog2000.com/hb9oab
WLOG2000Team: www.wlog2000.com



JE9PEL, Mineo Wakita wrote at 18:15:28 +0900, 17 Jul 2002:

I confirmed that MA of AO-40 with WiSP3215 (GSC 2.03) was
approximately 9MA fast in 2002, although 126MA slow in 2000.
And, MA of AO-10 was approximately 19MA slow. 

AO-40        UTC    Calsat   WinTrak   WiSP
16 Jul 2002, 16:00     163     163     172 (-9)
16 Jul 2002, 17:00     176     176     185 (-9)
16 Jul 2002, 18:00     189     189     198 (-9)

AO-10        UTC    Calsat   WinTrak   WiSP
17 Jul 2002, 07:00      26      26       7 (+19)
17 Jul 2002, 08:00      48      48      29 (+19)
17 Jul 2002, 09:00      70      70      51 (+19)


MA for the other satellite has the different error.
So, MA of WiSP3215 (GSC 2.03) seems to have many errors.

Now I think the orbit number of all the satellites increments at
perigee. However, NASA for Shuttle missions uses the ascending
node where increments the orbit number when the satellite crosses
the equator (going northward).

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