kd2bd@ka2qhd.UUCP (John Magliacane Wall Township NJ) (04/22/89)
The U.S. Space Shuttle ATLANTIS is scheduled for launch on mission STS-30 on
April 28th at 2:24 PM EDT (1824 UTC). The countdown is scheduled to begin at
8:00 AM (1200 UTC) on Tuesday, April 25th. The lauch window will be 22 minutes
in length.
The primary payload of mission STS-30 will be the deployment of the Magellan
Venus space probe.
* LAUNCH WINDOWS *
------------------
Here are some launch windows assigned for mission STS-30. All times and dates
are expressed in UTC:
Date From To
------+-------+------
28Apr : 18:24 : 18:42
29Apr : 18:18 : 18:43
30Apr : 18:13 : 18:44
01May : 18:07 : 18:45
02May : 18:01 : 18:45
03May : 17:54 : 18:46
04May : 17:48 : 18:47
* VENUS FACTS *
---------------
Radius: 3,630 miles
Rotational Period: 243 Earth days
Orbit Period: 225 Earth days
Distance from Sun: 64,920,000 miles
Density: 5.2 times that of water
Surface Gravity: 0.907 times that of Earth's gravity
Atmospheric Pressure at Surface: 90 times that of Earth's surface pressure
Surface Temperature: 850 degrees Fahrenheit
Atmospheric Composition: Carbon dioxide (96%); nitrogen (3+%); trace amounts
of surface dioxide, water vapor, carbon monoxide,
argon, helium, neon, htdrogen chloride and hydrogen
fluoride
* MAGELLAN MISSION HIGHLIGHTS *
-------------------------------
Interplanetary Cruise: 442 to 468 days
Planned Trajectory Correction Maneuvers: 15 days after deployment from
Shuttle; 360 days after deployment
from Shuttle; and 17 days before
Venus orbit insertion
Orbit Insertion: August 10, 1990, 1700 UTC, STAR 48 solid rocket motor fires
to put spacecraft in orbit around Venus
Mapping Orbit Period: 3.15 hours
Radar Mapping: 37 minutes per orbit
Mapping Orbit Inclination: 86 degrees
Superior Conjuction: October 26 to November 9, 1990
End of Nominal Mission: April 28, 1991
Data Gap Recoverable: June 27 to July 10, 1991
TRAJECTORY SEQUENCE OF EVENTS:
__________________________________________________________________
RELATIVE
EVENT MET VELOCITY MACH ALTITUDE
(d:h:m:s) (fps) (ft)
__________________________________________________________________
Launch 0/00:00:00
Begin Roll Maneuver 0/00:00:09 183 .16 774
End Roll Maneuver 0/00:00:17 365 .32 2,825
SSME Throttle Down to 65% 0/00:00:30 711 .64 9,043
Max. Dyn. Pressure (Max Q) 0/00:00:59 1,368 1.35 35,133
SSME Throttle Up to 104% 0/00:01:02 1,428 1.43 37,284
SRB Staging 0/00:02:05 4,212 3.93 153,405
Negative Return 0/00:03:58 6,915 7.39 319,008
Main Engine Cutoff (MECO) 0/00:08:31 24,286 22.70 362,243
Zero Thrust 0/00:08:38
ET Separation 0/00:08:45
OMS 1 Burn 0/00:10:31
OMS 2 Burn 0/00:44:27
Magellan/IUS Deploy (orbit 5) 0/06:18:00
Deorbit Burn (orbit 64) 3/23:53:00
Landing (orbit 65) 4/00:53:00
Apogee, Perigee at MECO: 85 x 3 nm
Apogee, Perigee post-OMS 1: 160 x 51 nm
Apogee, Perigee post-OMS 2: 160 x 160 nm
Apogee, Perigee post-deploy: 176 x 161 nm
73, John KD2BD @ NN2Z
<eof>
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