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[jamsat-news:588] * SpaceNews 14-Jul-97 *

* SpaceNews 14-Jul-97 *

BID: $SPC0714


			  MONDAY JULY 14, 1997

SpaceNews originates at KD2BD in Wall Township, New Jersey, USA.  It
is published every week and is made available for non-commercial use.

News of Mir's Progress docking and EVA has been reported by Mike Foale via
the Amateur Packet Radio communications system on-board the Mir space station:

 Stat   : PR   
 Posted : 07/07/97 09:40
 To     : ALL    
 From   : R0MIR  
 @ BBS  :        
 BID    : 
 Subject: Mir Progress Docking

 Progress docked normally this morning.  We are waiting 3 orbits before
 we start to unload it, checking the integrity of the hatch seals.  
 The station attitude control system is working well, using the girodynes,
 and the power sth the base block and module Kvant 2 powered (airlock and
 toilet) with modules Kristal and Priroda [are] unpowered.  Greenhouse
 experiment is continuing, using power from the base block, to dry the
 seed pods that have formed quite nicely.

 Stat   : PR   
 Posted : 07/11/97 16:08
 To     : ALL    
 From   : R0MIR  
 @ BBS  :        
 BID    : 
 Subject: Mir EVA

 The crew is now extremely busy, trying to crawl through all the bags 
 unloaded from Progress, which are now stored in dark, wet modules, which 
 have no power.  We are trying to inventory and assemble the 30 or so 
 cables and adapt, required to install the hatch 
 umbilical.  A training run will be done on the 15th, and the real eva 
 sometime after that.  I will get some refresher training on preparing the 
 soyuz for evacuation, and will be in a spacesuit,b,in the Soyuz during the
 eva itself.

 I will still try to read all your messages, but will have to leave most 
 unanswered because of the little time available to us.  Mike. KB5UAC

[Info via Dr. Dave Larsen, and Miles Mann]

BJ Arts, WT0N, serves as an Official Observer (OO), and has received many 
complaints about satellite operators running excessively high levels of
transmitter power within the uplink passband of Amateur communication
satellites.  Last week he observed stations on FO-20 and FO-29 running
enough power to be 5 to 10 'S' units above the level of the beacon signal.
In one case, two operators, who were in contact with one another, were
causing FO-20's AGC to block out all other incoming signals operating
with normal levels of transmitter power.

Satellite users should make certain that their downlink signals are no
stronger than that of the beacon transmitter.  Excessive levels of uplink
power pervent other users from equally sharing the satellite's transponder.
It only takes several watts of transmitter power to make contacts through
low-earth orbiting Amateur satellites.  If groundstations have difficulty
hearing their uplink signal with more than several watts of power, then
a significant upgrade in receiver sensitivity may be in order.  This can
be accomplished by using a higher gain downlink antenna, high quality coax,
or the use of a low-noise preamplifier (preferably mounted at the feedpoint
of the antenna).

AO-27 TEPR (Timed Eclipse Power Regulation) States are expected to follow
the following schedule (as of July 6, 1997):

  TEPR STATE      Time      TX Status
      1           N/A         OFF
      2           N/A         OFF
      3           ---         OFF
      4           21          OFF
      5           17          ON at Medium Power
      6           ---         OFF
The TEPR States are defined as follows:
TEPR 1, Started when the satellite enters the earth's shadow (eclipse)
TEPR 2, Started at (TEPR 1 time) after the eclipse starts
TEPR 3, Started at (TEPR 1 time) + (TEPR 2 time) ...
TEPR 4, Started when the satellite enters sunlight
TEPR 5, Started at (TEPR 4 time) after the satellite enters sunlight
TEPR 6, Started at (TEPR 4) + (TEPR 5) ...
Please note that TEPR states 1, 2 and 3 occur during nighttime passes, and
TEPR states 4, 5 and 6 occur during the day.  These occur during EVERY pass,
not just over the U.S.A.
The times assigned to the TEPR states are chosen for the health of the
satellite over operation convenience.  Therefore, during parts of the year
the satellite will turn on late or turn off early as seen by ground stations.
Users are reminded that as an FM-mode repeater, AO-27 is subject to the
"capture effect" and can only transmit one signal at a time.  Users are
asked to cooperate, keep calls short, give breaks so as many stations as
possible can work a pass, and above all, listen before and while
transmitting.  The satellite has a very sensitive receiver, and stations
running approximately 25 watts power to moderate-gain omnidirectional
antenna can get a good uplink signal into the satellite.  A sensitive
UHF-FM receiver with a preamplifier and an omnidirectional antenna can
receive AO-27's downlink with some fading; moderate-gain directional
arrays should provide a solid receive signal.  Remember to correct for
the +/- 9 kHz of Doppler shift on the 436 MHz downlink signal during a
pass.  No Doppler correction is needed for the 145.850 MHz uplink signal.
Users are asked not to transmit on 145.85 MHz if they do not hear the
satellite's downlink so as to avoid possible interference to other
satellite uplinks and downlinks on adjacent frequencies.
This, and other information on the AO-27 satellite can be can be found at:

[Info via Michael Wyrick, N4USI, AO-27 Control Operator]

The following is from the July issue of JARL News (magazine of Japan
Amateur Radio League), originally in Japanese, and is provided by Kazu
Sakamoto, JJ1WTK: 

July  4 (Fri)    09:13z  Digitalker
July  8 (Tue)    09:05z  JA
July 11 (Fri)    09:51z  JD 1200 bps
July 18 (Fri)    00:20z  JD 9600 bps
July 25 (Fri)    09:23z  JA

Aug   1 (Fri)    08:17z  JD 1200 bps
Aug   8 (Fri)    00:30z  JD 9600 bps
Aug  15 (Fri)    01:08z  JA
Aug  22 (Fri)    08:26z  JD 1200 bps
Aug  29 (Fri)    00:40z  JD 9600 bps

Sept  5 (Fri)    01:18z  JA
Sept 12 (Fri)    00:13z  JD 1200 bps
Sept 19 (Fri)    00:51z  JD 9600 bps
Sept 26 (Fri)    08:09z  JA

FO-20 is in Mode JA continuously.

* RS-12 NEWS *
Rusty, NM1K, reports a new regular on RS-12: KL7AH.  KL7AH can often be
heard on the east coast of US during passes having elevations of 20 degrees
of less above the horizon.

The SAREX experiment package on Space Shuttle Columbia has been activated
in both voice and packet radio modes.  An archive of messages regarding
STS-94 SAREX bulletins is available at:


The SAREX Working Group has designated the following frequencies during
the STS-94 mission:

	FM Voice Downlink: (Worldwide) 145.55 MHz FM
	FM Voice Uplink: 144.91, 144.93, 144.95, 144.97, and 144.99 MHz
	FM Voice Uplink: (Europe only) 144.70, 144.75, and 144.80 MHz
	FM Packet Downlink: 145.55 MHz
	FM Packet Uplink: 144.49 MHz

	FM Voice call signs: KC5RNI, KC5BTK and KC5FVF
	FM Packet call sign: W5RRR-1

A surplus of power in the Microgravity Science Laboratory has permitted
packet radio operations to take place on STS-94.  Since STS-94 is a
re-flight of the shortened STS-83 flight, and since the SAREX gear did
not go back to NASA/JSC from KSC and was not re-programmed after STS-83,
the Heathkit SAREX TNC aboard Columbia reports "STS-83" in downlink packets.

Hams should avoid transmitting on the shuttle's downlink frequencies.  
The crew will not favor any uplink frequency, so your ability to 
communicate with SAREX will be the "luck of the draw."  Transmit only 
when the shuttle is within range of your station, and when the shuttle 
station is on-the-air.  

The crew will use separate receive and transmit frequencies.  PLEASE do 
not transmit on the shuttle's DOWNLINK frequency.  The DOWNLINK is your 
receiving frequency.  The UPLINK is your transmitting frequency. 

Late aquisition of signal continues to be observed while the orbiter 
attitude is roughly "tail down, main engines forward".  Most contacts 
reported occur well after rise time, but not necessarily after TCA, 
due to the observers squint angle of the antenna on Columbia.  AOS 
seems to be about 1.5 to 2 minutes after rise.

Send reception reports and QSLs to ARRL EAD, STS-94 QSL, 225 Main Street,
Newington, CT 06111-1494, USA.  Include the following information in 
your QSL or report: STS-94, date and time in UTC, frequency and mode 
(FM voice or packet).  In addition, you must also include a SASE using 
a large, business-sized envelope if you wish to receive a card.

STS-94 represents the 23rd flight of Columbia and the 85th mission flown
since the start of the Space Shuttle program in April 1981.  Be advised
that the next SAREX mission is not scheduled until August 1998.  A great
deal of effort is being made toward the next phase of SAREX: implementation
on the International Space Station.

[Info via Pat Kilroy, WD8LAQ]

Comments and input for SpaceNews should be directed to the editor (John,
KD2BD) via any of the paths listed below:
WWW       : http://www.njin.net/~magliaco/
INTERNET  : kd2bd@amsat.org, magliaco@email.njin.net

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