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Path: utzoo!watmath!clyde!burl!ulysses!gamma!exodus!mhtsa!mh3bs!eagle!allegra!karn
From: karn@allegra.UUCP
Newsgroups: net.ham-radio
Subject: UoSAT-B Events, elements
Message-ID: <2294@allegra.UUCP>
Date: Tue, 21-Feb-84 15:49:31 EST
Article-I.D.: allegra.2294
Posted: Tue Feb 21 15:49:31 1984
Date-Received: Wed, 22-Feb-84 02:29:43 EST
Organization: Bell Communications Research, Inc
Lines: 48

I just made a phone call to Millstone Hill and received the following
information regarding the UoSAT-B launch events, relative to T = 0:

Event				hh:mm:ss (relative to liftoff)
1st stage main engine cutoff:	00:03:47
Vernier engine cutoff:		00:03:53
Stage 1 separation:		00:03:55
Stage 2 ignition #1:		00:04:00
Stage 2 cutoff #1:		00:10:50
Stage 2 ignition #2:		00:54:04
Stage 2 cutoff #2:		00:54:17
Landsat separation:		00:59:10
Stage 2 maneuver start:		00:59:15
Stage 2 maneuver stop:		00:59:52
Uosat-B separation:		01:11:40
Stage 2 ignition #3:		01:30:53	distancing maneuver
Stage 2 cutoff #3:		01:30:58
Stage 2 ignition #4:		01:36:43	depletion (deorbit?) burn
Stage 2 cutoff #4:		01:37:05

I also got some numbers for preliminary orbital elements.  These do not
necessarily agree exactly with the numbers Harold gave, so I suspect
either they were derived from a different source, or apply to different
instants in the launch sequence.  The only major apparent discrepancy is
in RAAN, but we've seen this problem before - it probabably has only to
do with a different convention in coordinate systems.

Satellite: uosat-b
Epoch time:      84061.79768519 (separation)
   Thu Mar  1 19:08:40.000 1984 UTC
Element set:     prelaunch
Inclination:       98.2596 deg
RA of node:       124.2426 deg
Eccentricity:    0.0004100
Arg of perigee:   174.4207 deg
Mean anomaly:     226.7604 deg
Mean motion:   14.61025794 rev/day
Decay rate:              0 rev/day^2 (none given)
Epoch rev:               0
Semi major axis:  7065.080 km
Anom period:     98.560888 min
Apogee:            690.030 km (These I computed from other MH numbers,
Perigee:           684.236 km and agree pretty closely with Harold's numbers)

From this, I can see that the first pass visible over the eastern US
will occur just after 00:00 UTC on 2 Mar.

Phil