dna@dsd.UUCP (03/14/84)
Posted: Tue Mar 13, 1984 10:18 AM GMT Msg: FGIE-1738-1297
From: GRATCLIFF
To: MSWEETING
CC: AMSAT
Subj: Martin,
Summary of data from Daryl VK1DK
Signals:-
Day 68 2259-2301
Intermittent raspy carrier on 145.822 with associated broad-
band RFI, 3 bursts of signals for 2-3secs on each occasion,
maximum level -120dBM
Day 69 0029-0036
Clean carrier
0029:31 0031:19
0031:40 0032:55 approx 145.806 -108dBM
0033:27 0034:07
0034:21 0034:44
0035:47 0035:55
0036:07 0036:16
Day 71 0018-0019
Clean carrier 145.827(6) -101dBM
0018:27 clean carrier appeared for 2-3secs on approx 145.823
0018-0019 spurious with intermittent line spectra and broad-
band (sawtooth shape) RFI on 145.82+/-0.25. Ragged carrier
with jagged sidebands (?telemetry) for about 3secs on 145.82
Angle data:-
Orroral valley coordinates -35.631 S 211.044 W
Day Time Actual Predicted
AZ EL AZ EL
68 2259:20 162.7 34.3 165 30
2300:20 173.4 23.3 175 20
2301:2: 199.0 15.4 181 13
71 0009:10 336.0 3.5 342 0
0010:10 336.0 3.5 338 1
0018:10 241.8 16.5 236 15
0019:10 230.4 12.4 226 10
Predicted data form W3IWI program using NASA set with epoch
day 62.13.....etc
Doppler data:-
Day 68 2301 -3Khz Landsat -3254 Uosat -2498
71 0008:15 +2.6 Landsat >3200 Uosat >3000
71 0018:27 -2 Landsat -2003 Uosat -1806
The doppler figures for Landsat and Uosat are predicted only
(i.e. Landsat by NASA Uosat by W3IWI program)
Hope the above data maybe of some use. Is there any like-
lihood of you letting the Watch-Dog timer time out then
trying for a fresh start ???? Anyway everyone in VK has
everything crossed for you to successfully regain control
of Uosat-2
Cheers from 'Down-Under'
Graham VK5AGR
To: Satellite trackers
From: Phil Karn
Here's a recent set:
Satellite: oscar-11
Catalog number: 14781
Epoch time: 84073.70137990
Tue Mar 13 16:49:59.223 1984 UTC
Element set: MH 3-13-84
Inclination: 98.2610 deg
RA of node: 136.1480 deg
Eccentricity: 0.0012076
Arg of perigee: 233.9610 deg
Mean anomaly: 126.0480 deg
Mean motion: 14.61818731 rev/day
Decay rate: 1.59e-06 rev/day^2
Epoch rev: 175
Semi major axis: 7062.526 km
Anom period: 98.507426 min
Apogee: 706.604 km
Perigee: 689.547 km
Beacon: 145.8250 mhz
Following is a comparison of AOS times for KA9Q on 14 March 84 as
predicted by a couple of sets. I am highly suspicious of all sets
between NASA #5 and MH 3-11-84mod, since #4 and MH 3-13-84 match so
closely.
NASA #4: 01:08:23
NASA #5: 01:05:11
MH 3-7-84: 01:06:22
MH 3-11-84mod: 01:07:54
MH 3-13-84: 01:08:27
73, Phil
I may have spoken too soon on the subject of UO-11 element set accuracy.
Recent reports from the Orroral Valley tracking station in Australia
for days 68 and 71 do not correlate well at all with all of the recent
element sets, but they are much closer to NASA sets #1 and 2.
Whatever object is being tracked in element sets #3, 4, 5, MH 3-7-84,
MH 3-11-84, MH 3-11-84mod and MH 3-13-84 is running about 12-13 minutes
earlier than what was tracked for sets #1 and 2. This confusion might
very well be responsible for the unsuccessful NK6K/N6CA command attempts,
and I'm trying to track this problem down.
Phil