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STS-93 SAREX Bulletin 1

STS-93 SAREX Bulletin 1: Columbia Ready

Silver Spring, Maryland  USA
July 19, 1999 @ 2300 UTC

Columbia Ready for the Final SAREX Flight

Just a few hours before launch, operations continue on schedule 
for space shuttle Columbia on STS-93, the brief five-day mission 
on which the Chandra X-Ray Observatory will be deployed.  

According to Reuters news service, Chandra, named for late Indian-
born Nobel Laureate Subrahmanyan Chanrasekhar, known as Chandra to 
his friends, will study X-ray emissions from distant stars and 
galaxies that are largely undetectable from earth because of 
atmospheric distortion.  

STS-93 is the 25th and final flight of the Space Amateur Radio 
EXperiment (SAREX) on the space shuttle.  Amateur Radio in human 
space flight will continue the fine tradition set by the shuttle 
and space station Mir by soon boarding the International Space 
Station.  This will take the form of the multinational Amateur 
Radio on the International Space Station (ARISS).  

As in previous SAREX missions, crew members will take turns making 
scheduled 2-way radio contacts with schools, random radio contacts 
with Amateur Radio operators, and a few personal contacts with 
their families.  

Five schools are scheduled to talk with the astronauts using ham 
radio frequencies and the volunteer-based AMSAT Telebridge Network.  
The primary goal of the SAREX and ARISS programs is to excite the 
students' interest in science, technology, mathematics and the 
U.S. and international space program.  

To find out when Columbia will be in your radio range, a 
satellite tracking program for your personal computer can be 
obtained from the AMSAT web site at 
<http://www.amsat.org/amsat/ftpsoft.html#pc-trk> or other 
sources, or watch for SAREX Rise/Set times in coming SAREX 

Here is a pre-launch set of the estimated orbital elements from 
Gil Carman, WA5NOM, that describes the orbit during the time 
period when the school contacts and most of the amateur radio 
operations are to take place: 

1 99093U          99202.11969685  .00195261  00000-0  45118-3 0  39
2 99093  28.4716 190.1407 0001364  70.2068 289.8869 15.95498675 165

Satellite: STS-093
Catalog number: 99093
Epoch time:      99202.11969685  = (21-Jul-1999  02:52:21.808 UTC)
Element set:     003
Inclination:       28.4716 deg
RA of node:       190.1407 deg        Space Shuttle Flight STS-093
Eccentricity:     .0001364           Prelaunch element set JSC-003
Arg of perigee:    70.2068 deg    Launch: 20-Jul-1999 04:36:00 UTC
Mean anomaly:     289.8869 deg
Mean motion:   15.95498675 rev/day             Gil Carman
Decay rate:    1.95261e-03 rev/day^2     NASA Johnson Space Center
Epoch rev:              16
Checksum:              346

Deorbit:  25-Jul-1999 02:31 UTC  (orbit 79)  MET 04/21:55
Landing:  25-Jul-1999 03:23 UTC  (orbit 80)  MET 04/22:47

Introducing the crew of Columbia on STS-93: 

Commander            (CDR) Eileen Collins, KD5EDS 
Pilot                (PLT) Jeffrey Ashby 
Mission Specialist 1 (MS1) Cady Coleman, KC5ZTH 
Mission Specialist 2 (MS2) Steven Hawley 
Mission Specialist 3 (MS3) Michel Tognini, KD5EJZ 

Frequencies in MHz (FM): 
                            Uplink   Downlink
Packet                      144.49    145.80
European voice              144.49    145.80
Voice (except over Europe)  144.47    145.80
Voice (except over Europe)  144.45    145.80
School contacts             varies    145.80

Outside Europe, pick one of the two voice frequencies at random. 


SAREX voice and packet radio operations will begin before the 
first school contact which occurs early in Flight Day 2.  

Gil Carman, WA5NOM, says the crew has expressed a preference for 
voice mode over packet during the periods when they are awake, 
with the packet robot on only during sleep periods.  All passes 
over the continental U.S. are during their awake shifts, and 
all sleep passes will be over Asia and South America.  So, U.S. 
stations may have few packet opportunities on this flight. 

Please listen on the downlink for the crew to call CQ.  If the 
crewperson is in the middle of a QSO please wait until they are 

Packet: Connect to W5RRR-1 and you will get a packet connect 
number from the robot mode.  Please do this only once.  Connecting 
multiple times only deprives others of a chance to participate. 

Turn on monitoring to see who else is working the robot mode and 
to get status messages from the SAREX packet rig. 

Please do not connect to other ground stations through the 
SAREX packet rig. 

Timely and highly valuable information is being released by 
Bob Bruninga, WB4APR, on the anticipated SAREX packet radio 
operations and APRS opportunities.  Watch for his posts to the 
sarex@amsat.org e-mail list 
<http://www.amsat.org/amsat/listserv/menu.html> and various 
TAPR and APRS mail lists 
<http://www.tapr.org/tapr/html/sigf.html>, and news in 
these SAREX bulletins <http://sarex.gsfc.nasa.gov>.   

Bulletin updates will be released periodically through the mission.  
You may also check <http://garc.gsfc.nasa.gov/~kc6rol/sts93.html> 
for late braking news.  

Submitted by Pat Kilroy, WD8LAQ, for Will Marchant, KC6ROL, and 
the SAREX Working Group.


Patrick L. Kilroy                                                 HM
SSPP Hitchhiker I&T Lead Engineer   Phone:  301-286-1984
NASA/Goddard Space Flight Center    Fax:    301-286-1673
Building 5, Mail Code 568           E-mail: pat.kilroy@gsfc.nasa.gov
Greenbelt, Maryland  20771          Web:    http://sspp.gsfc.nasa.gov

      Visit SimSat website at http://simsat.gsfc.nasa.gov

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