
SB SAT @ AMSAT   $ANS-289.01
STS-58 LAUNCH SET AGAIN

HR AMSAT NEWS SERVICE BULLETIN 289.01 FROM AMSAT HQ
SILVER SPRING, MD OCTOBER 16, 1993
TO ALL RADIO AMATEURS BT
BID: $ANS-289.01

After Two Launch Attempts, STS-58 WILL TRY AGAIN 18-OCT-93!

The 3rd launch attempt of STS-58 is now scheduled for Monday, 18-OCT-93
at 14:53 UTC.  The following are the preliminary keplerian elements to be
used.

 STS-58
 1 00058U          93291.67747791  .00119475  00000-0  26040-3 0    77
 2 00058  39.0114 128.6088 0007676 272.4217  87.5676 15.96123499    27

Satellite: STS-58
Catalog number: 00058
Epoch time:      93291.67747791   =    (18-OCT-93   16:15:34.09 UTC)
Element set:     007
Inclination:       39.0114 deg
RA of node:       128.6088 deg           Space Shuttle Flight STS-58
Eccentricity:     .0007676              Prelaunch Element set JSC-007
Arg of perigee:   272.4217 deg          Launch:  18-OCT-93  14:53 UTC
Mean anomaly:      87.5676 deg
Mean motion:   15.96123499 rev/day           Gil Carman (WA5NOM)
Decay rate:    1.19475e-03 rev/day~2      NASA Johnson Space Center
Epoch rev:               2
Checksum:              331


Space Shuttle Columbia's planned launch has been postponed until Monday,
18-OCT-93.  The scheduled launch time begins at 10:53 EDT.  One of 2 S-Band
transponders used for air-to-ground communications failed during pre-flight
checks on the second launch attempt 15-OCT-93.  Engineers reported a solid
state failure in the receiver unit.  Also contributing to the delay was the
lack of favorable weather conditions.

STS-58 Shuttle Amateur Radio Experiment (SAREX) Information Sheet:


Mission:                STS-58 Space Shuttle Columbia
                        Spacelab Life Sciences-2 (SLS-2) Mission

 Launch:                 October 18, 1993, 14:53 UTC

 Orbit:                  39 degrees orbital inclination

 Mission Length:         13 days (Nominal)

 Amateur Radio
 Operators:              Bill McArthur (KC5ACR), Marty Fettman (KC5AXA),
                         Rick Searfoss (KC5CKM)

 Modes:                  FM Voice
                         Prime callsign KC5ACR

                         Packet Radio
                         Callsign W5RRR-1

 Frequencies:    All operations in split mode.  Do not transmit on
                 the downlink frequency of 145.550 MHz.


 Voice Freqs:    Downlink: 145.55 MHz  (Worldwide)
                 Uplinks:  144.91, 144.93, 144.95, 144.97, 144.99 MHz
                           (Except Europe)
                           144.70, 144.75, 144.80 MHz (Europe only)

                         Note: The crew will not favor any specific
                          uplink frequency, so your ability to work the
                         crew will be the "luck of the draw."

 Packet Freqs:   Downlink:       145.55 MHz
                 Uplink:         144.49 MHz

 Info:   Goddard Amateur Radio Club, WA3NAN, Greenbelt Maryland,
         SAREX Bulletins and Shuttle Retransmissions
         3.860 MHz, 7.185 MHz, 14.295 MHz, 21.395 MHz, 28.650 MHz
         and 147.450 MHz (FM)

         Johnson Space Center ARC, W5RRR, Houston, Texas
         SAREX Bulletins 7.225 MHz, 14.280 MHz, 21.395 MHz,
         28.650 MHz, (SSB) and 146.64 MHz (FM)

         ARRL Amateur Radio Station, W1AW, Newington, CT
         SAREX News Bulletins
         3.990, 7.290, 14.290, 18.160, 21.390, and 28.590 MHz
         and 147.555 MHz (FM)

         Also, bulletins available on internet, via AMSAT ANS,
         Compuserve, and your local PBSS.

 School Group Participation:     18 school groups will participate
                                 in SAREX with pre-scheduled direct
                                 and telebridge contacts.  These include
                                 17 in the U.S., and one France.

 [The AMSAT News Service (ANS) would like to thank Frank Bauer (KA3HDO)
 for this bulletin item.]

/EX

SB SAT @ AMSAT   $ANS-289.02
AO-13 ECLIPSE SEASON APPROACHES

HR AMSAT NEWS SERVICE BULLETIN 289.02 FROM AMSAT HQ
SILVER SPRING, MD OCTOBER 16, 1993
TO ALL RADIO AMATEURS BT
BID: $ANS-289.02

G3IOR Provides Information About Sun/Moon Eclipses For AO-13

During the course of the year as AO-13 makes its way around the Earth in
its highly elliptical orbit, there will be a few Earth-Moon-Sun
"geometries" which will cause AO-13 to experience either partial or
complete darkness because of the Earth or the Moon obscuring AO-13's view
of the Sun.  For most "Low-Earth-Orbiting" (LEO) satellites, many OSCAR
users are aware that they experience eclipes daily for varying periods
during each orbit.  But for AO-13, these eclipse periods come only during
certain times in the year and not only are Ground Controllers aware of
these times, but every user of AO-13 should also be aware of the eclipse
seasons.  G3IOR predicts that the next lunar eclipse will occur on
13-NOV-93 beginning at 13:33 UTC and ending at 15:13 UTC.  AO-13 will not
experience total darkness during this lunar eclipse since the Moon will
only obscure AO-13 from the Sun by 89% at its peak.  The peak of this
eclispe, or the maximum darkness, will occur at 14:16 UTC.  For those AO-13
telemetry gathering enthusiasts, you can monitor the General Telemetry
Beacon on a downlink frequency of 145.812 MHz or 2400.646 MHz.  Only
stations on the west coast of the U.S., Pacific, Australia, and Japan will
have visibility to AO-13 during this lunar eclipse.  Since most of this
lunar eclipse will happen during a Mode-S transponder period, there will be
no adjustment made to the transponder schedule.  G3IOR says that this is
because Mode-S draws very little power during its operation.  Using any
recent set of keplerian elements in InstantTrak V1.00b, it appears that at
13:33 UTC the Mean Anomaly (MA) count for AO-13 will be 171; at the peak of
the lunar eclipse (89% obscuration) at 14:16 UTC the AO-13 will be at
MA 187.  The end of the eclipse will be around MA 209 at 15:13 UTC on
13-NOV-93.  This puts the start of the lunar eclispe in Mode-BS, then the
rest of the eclipse period either with the Mode-S transponder in operation
or Mode-S beacon only operation.  Those wishing to collect telemetry should
be prepared to move to Mode-S during this period.  Please take note of the
following AO-13 transponder operating schedule which covers the lunar
eclipse period:

M QST *** AO-13 TRANSPONDER SCHEDULE ***  1993 Oct 25-Nov 15
Mode-B  : MA   0 to MA 130 !
Mode-BS : MA 130 to MA 180 !
Mode-S  : MA 180 to MA 205 !<- S transponder; B trsp. is OFF
Mode-S  : MA 205 to MA 210 !<- S beacon only
Mode-BS : MA 210 to MA 226 !        Blon/Blat 210/0
Omnis   : MA 240 to MA  80 !  Move to attitude 240/0, Nov 15
Please don't uplink to Mode-B between MA 180-205 as this interferes with
Mode-S transponder operations.

As far as situation where the Earth blocks the Sun from AO-13, these solar
eclipses will begin on 07-DEC-93 and continue until 24-DEC-93.  Because the
length of eclipse periods can be quite long, a special transponder schedule
will be implemented during this time period.  The following schedule is
designed to take these solar eclipse periods into account.

L QST *** AO-13 TRANSPONDER SCHEDULE ***  1993 Nov 15-Jan 31
Mode-B  : MA   0 to MA  95 !                   / Eclipses, max
Mode-B  : MA  95 to MA 180 ! OFF Dec 07 - 24. <  duration 136
Mode-B  : MA 180 to MA 220 !                   \ minutes.
Mode-S  : MA 220 to MA 230 !<- S transponder; B trsp. is OFF
Mode-BS : MA 230 to MA 226 !        Blon/Blat 240/0
Omnis   : MA 250 to MA 150 !  Move to attitude 180/0, Jan 31
Please don't uplink to Mode-B between MA 220-230 as this interferes with
Mode-S transponder operations.

G3IOR encourages those who wish to monitor a particular telemetry parameter
during these solar eclipse periods, should let him know since he will make
sure that parameter is part of the Whole Orbit Data (W0D) collection
facility.

[The AMSAT News Service (ANS) would like to thank James Miller (G3IOR) for
 the information which went into this bulletin item.]

/EX

SB SAT @ AMSAT   $ANS-289.03
AMSAT OPS NET SCHEDULE

HR AMSAT NEWS SERVICE BULLETIN 289.03 FROM AMSAT HQ
SILVER SPRING, MD OCTOBER 16, 1993
TO ALL RADIO AMATEURS BT
BID: $ANS-289.03

Current AMSAT Operations Net Schedule For AO-13

AMSAT Operations Nets are planned for the following times.  Mode-B Nets
are conducted on AO-13 on a downlink frequency of 145.950 MHz.  If, at the
start of the OPS Net, the frequency of 145.950 MHz is being used for a QSO,
OPS Net enthusiasts are asked to move to the alternate frequency of 145.955
MHz.

 Date           UTC    Mode     Phs     NCS     Alt NCS

23-Oct-93       1315   B       154      WB6LLO  WA5ZIB
30-Oct-93       1300   B        62      W5IU    WB6LLO
13-Nov-93       1230   B       146      VE2LVC  W5IU

Any stations with information on current events would be most welcomed.
Also, those interested in discussing technical issues or who have questions
about any particular aspect of OSCAR statellite operations, are encouraged
to join the OPS Nets.  In the unlikely event that either the Net Control
Station (NCS) or the alternate do not call on frequency, any participant is
invited to act as the NCS.

**************************************

Slow Scan Television on AO-13

SSTV sessions will be held on immediately after the OPS Nets a downlink
on a Mode-B downlink frequency 145.960 MHz.

/EX

SB SAT @ AMSAT   $ANS-289.04
WEEKLY OSCAR STATUS REPORTS

HR AMSAT NEWS SERVICE BULLETIN 289.04 FROM AMSAT HQ
SILVER SPRING, MD OCTOBER 16, 1993
TO ALL RADIO AMATEURS BT
BID: $ANS-289.04

Weekly OSCAR Status Reports: 16-OCT-93

AO-13: Current Transponder Operating Schedule:
L QST *** AO-13 TRANSPONDER SCHEDULE ***  1993 Aug 25-Oct 25
Mode-B  : MA   0 to MA  90 !
Mode-BS : MA  90 to MA 120 !
Mode-S  : MA 120 to MA 145 !<- S transponder; B trsp. is OFF
Mode-S  : MA 145 to MA 150 !<- S beacon only
Mode-BS : MA 150 to MA 180 !        Blon/Blat 180/0
Mode-B  : MA 180 to MA 256 !
Omnis   : MA 230 to MA  40 !  Move to attitude 210/0, Oct 25

M QST *** AO-13 TRANSPONDER SCHEDULE ***  1993 Oct 25-Nov 15
Mode-B  : MA   0 to MA 130 !
Mode-BS : MA 130 to MA 180 !
Mode-S  : MA 180 to MA 205 !<- S transponder; B trsp. is OFF
Mode-S  : MA 205 to MA 210 !<- S beacon only
Mode-BS : MA 210 to MA 226 !        Blon/Blat 210/0
Omnis   : MA 240 to MA  80 !  Move to attitude 240/0, Nov 15
Please don't uplink to Mode-B between MA 180-205 as this interferes with
Mode-S transponder operations. Reorientation from Attitude 180/0 to 210/0:
A magnetorque will be initiated on Orbit #4105 MA 224 [Oct 24 @ 03:48 UTC]
and will be executed over 4 perigees, completing on Orbit #4109 MA 32 [Oct
25 @ 17:00 UTC].  The new schedule, as per M-block, will be invoked Orbit
#4109 MA 140, and thus that orbit (only) will contain two Mode-S sessions.
Continuous up-to-date information about AO-13 operations is always avail-
able on the beacons at 145.812 MHz and 2400.646 MHz in CW, RTTY and 400 bps
PSK.  Also, these bulletins are also posted to INTERNET, ANS bulletins,
Packet, PACSATs, etc., and can also be found in many international news-
letters. [G3RUH/DB2OS/VK5AGR]

AO-16: Operating normally. [WH6I]

UO-22: Operating normally. [WH6I]

KO-23: Up and running.  Busy as usual.  The images are no longer avail-
       able. [WH6I]

KO-25: Has been in "TICK" mode lately.  [WH6I]

RS-12: W9CGI reports that he had his first satellite contact through RS-12
a couple of weeks ago on Mode-K, i.e., 15M uplink and 10M downlink.  He
reports that he made about 4 contacts altogether, on two different passes.
W9CGI would appreciate any ideas/filter or thoughts, etc. from any other RS-12
users on how to keep the 15M uplink out of his 10M receiver so that he can
run duplex like any other mode bird.  He uses a Yaesu FT990 at about 10W on
15M uplink to a Cushcraft R5 vertical.  For the downlink he has a vertical
J-pole about 60 ft from the R5 antenna and then inside he uses a HF con-
verter in the FT726 transceiver.  The FT726 is of course his normal Mode-B
rig.  W9CGI says that he is finally finding time to get back on the birds
so he is looking forward to making many contacts.
[W9CGI @ N5AAA.IN.USA]

The AMSAT NEWS Service (ANS) is looking for volunteers to contribute weekly
OSCAR status reports.  If you have a favorite OSCAR which you work on a
regular basis and would like to contribute to this bulletin, please send
your observations to WD0HHU at his CompuServe address of 70524,2272, on
INTERNET at wd0hhu@amsat.org, or to his local packet BBS in the Denver, CO
area, WD0HHU @ W0LJF.#NECO.CO.USA.NOAM.  Also, if you find that the current
set of orbital elements are not generating the correct AOS/LOS times at
your QTH, PLEASE INCLUDE THAT INFORMATION AS WELL.  The information you
provide will be of value to all OSCAR enthusiasts.

/EX


