Date: Fri, 17 Dec 93 04:30:28 PST
From: Ham-Space Mailing List and Newsgroup <ham-space@ucsd.edu>
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Subject: Ham-Space Digest V93 #113
To: Ham-Space
Ham-Space Digest Fri, 17 Dec 93 Volume 93 : Issue 113
Today's Topics:
* SpaceNews 13-Dec-93 *
Dealing with Doppler Shift?
Shuttle radio transmissions
Two-Line Orbital Element Set: Space Shuttle
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----------------------------------------------------------------------
Date: Fri, 10 Dec 1993 10:32:16 MST
From: destroyer!nntp.cs.ubc.ca!alberta!adec23!ersys!ve6mgs!usenet@uunet.uu.net
Subject: * SpaceNews 13-Dec-93 *
To: ham-space@ucsd.edu
SB NEWS @ AMSAT $SPC1213
* SpaceNews 13-Dec-93 *
BID: $SPC1213
=========
SpaceNews
=========
MONDAY DECEMBER 13, 1993
SpaceNews originates at KD2BD in Wall Township, New Jersey, USA. It is
published every week and is made available for unlimited distribution.
* MIR NEWS *
============
Jean-Claude, FB1RCI, of Marseille, France has provided a graphical view
depicting the altitude of the Russian space station Mir over the past year
based on the mean motion of the spacecraft:
Rev per day
15.53 I\_
I \_
15.55 I \_
I \__ _
_ I \__ _ __ I\ I
I \_ I \___ I \_ I \___ I \ I
15.60 _ _ I \_ I \__I \_I \____I \I
\_ I \_ I \/
\_ I \I
\_I
15.65
/\______________________________/\_________________________________/\__
1992 1993 1994
(I = Boost to higher orbit)
* AMSAT-OSCAR-13 NEWS *
=======================
AO-13 is now experiencing the longest eclipses it will ever experience,
indeed the longest that ANY amateur satellite has received! The period
affected is Dec 08 - 24. Most eclipses exceed 2 hours, with the longest
136 minutes on Dec 15th.
In addition, the Sun angle is -30 degrees and worsening, giving only 86%
illumination now, less later. The mode-B transponder is only just
sustainable, and is on for the minimum sensible time, MA 180-250 with a
break from 220-230 for mode-S exclusive.
There is no guarantee that even this is enough safety margin, and further
curtailments may be necessary, including a slight reorienation to collect
more sunlight.
The Whole Orbit Data collection in the K-block is presently monitoring
battery voltage. The safety threshold is 12.6 volts, when the on-board
computer will closedown the transponder if necessary. Bytes 64-191 are
voltage at 8 MA intervals, and convert as V = (N-10)*0.0668 volts.
Please be sensitive about your uplink power. Remember, optimum conditions
occur at only 30,000 km range now. Compared with apogee that's a 6 db round
trip improvement, so you can cut your power by 1/4 and be no worse off.
L QST *** AO-13 TRANSPONDER SCHEDULE *** 1993 Dec 08-Jan 31
Mode-B : MA 250 to MA 256 ! OFF Dec 08 - 24 | Eclipses, max
Mode-B : MA 0 to MA 180 ! OFF | 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 250 ! Alon/Alat 240/-5
Omnis : MA 250 to MA 150 ! Move to attitude 180/0, Jan 31
Long eclipses and poor Sun angle now need maximum OFF time.
[Info via James, G3RUH @ GB7DDX.#22.GBR.EU]
* ITAMSAT-OSCAR-16 NEWS *
=========================
ITAMSAT-OSCAR-26 suffered a software crash at approximately 11:30 UTC
on 08-Dec-93 during a pass over Europe. The crash left the transmitter
on with no MBL or telemetry. The satellite was successfully recovered
on 09-Dec-93 through a joint effort by Alberto Zagni I2KBD and the Eyesat
ground station in the United States. IO-26 was reset to its safe mode
(MBL with transmitter off) at about 05:40 UTC.
Alberto, I2KBD, on the first evening pass over Europe was able to switch
the transmitter on again, and began some memory dumps in order to gain
more information about the software crash. The TX was switched on at
19:00 UTC, and is now sending MBL telemetry.
The ITAMSAT Command Team will probably delay the recommissioning of the BBS
on IO-26 to allow a better understanding of the orbital parameters, in order
to be able to raise the power when the BBS will be turned on again. Look
for any bulletin in the downlink for upcoming WODs.
The ITAMSAT Command Team would like to thank the Eyesat ground station,
Jeff Ward G0/K8KA and Harold Price NK6K for their help.
ITAMSAT Command Team can be reached via Internet as i2kbd@amsat.org
or ik2ovv@amsat.org, and on Compuserve HAMNET.
[Info via Luca Bertagnolio, IK2OVV, of the ITAMSAT Command Team]
* THANKS! *
===========
Thanks to all those who sent messages of appreciation regarding SpaceNews,
especially:
CT1AJY KD1NV IW2EPE N2IRO NW2L G6CNF
* FEEDBACK/INPUT WELCOMED *
===========================
Mail to SpaceNews should be directed to the editor (John, KD2BD) via any
of the following paths:
FAX : 1-908-747-7107
PACKET : KD2BD @ N2KZH.NJ.USA.NA
INTERNET : kd2bd@ka2qhd.ocpt.ccur.com -or- kd2bd@amsat.org
MAIL : John A. Magliacane, KD2BD
Department of Engineering and Technology
Advanced Technology Center
Brookdale Community College
Lincroft, New Jersey 07738
U.S.A.
<<=- SpaceNews: The first amateur newsletter read in space! -=>>
/EX
--
John A. Magliacane, KD2BD * /\/\ * Voice : 1-908-224-2948
Advanced Technology Center |/\/\/\| Packet : KD2BD @ N2KZH.NJ.USA.NA
Brookdale Community College |\/\/\/| Internet: kd2bd@ka2qhd.ocpt.ccur.com
Lincroft, NJ 07738 * \/\/ * Morse : -.- -.. ..--- -... -..
------------------------------
Date: Mon, 13 Dec 1993 19:45:55 GMT
From: sgiblab!swrinde!cs.utexas.edu!howland.reston.ans.net!EU.net!news.inesc.pt!animal.inescn.pt!ciup2.ncc.up.pt!brigite.ci.ua.pt!etjfonte@ames.arpa
Subject: Dealing with Doppler Shift?
To: ham-space@ucsd.edu
You can Work it also on RS12/13.In this one the UPLINK is on 21 and
DOWNLINK on 29Mhz....The dopler is a funny thing.
In many AMSAT meetings you can hear them saying :
X-Newsreader: TIN [version 1.1 PL8]
"Is like being stopped near a railroad and train passing by
making noise.If you give attention to the noise is not always the
same.It's a variable frequency but the diference is very small..
"
Sorry for English ...................
If you work Birds you have to be with RIT on to get the other
station fine....
============
= CT1ENQ =
============
Best 73's , good DXing !!...
CT1ENQ - Jose' Miguel MBF Aveiro Uni.PORTUGAL
P.O.Box 108
4801 Guimaraes
Portugal Electronics & Telecomunications Dept.
prvalko (prvalko@vela.acs.oakland.edu) wrote:
: The way I understand it, one uses the satellites such that the LOWER
: frequency never gets adjusted. i.e. on RS-10/11 you tune the 145
: transmitter so that the 29 MHz receive frequency stays put.
: Am I right or wrong on this?
: 73 paul wb8zjl (newbie)
------------------------------
Date: Thu, 9 Dec 1993 09:43:23 GMT
From: news.acns.nwu.edu!math.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!doc.ic.ac.uk!uknet!pipex!bbc!ant!boyer@network.ucsd.edu
Subject: Shuttle radio transmissions
To: ham-space@ucsd.edu
I would like to listen to the shuttle. I realise that this will only be
possible if it transmits on HF. has anyone got any frequncies?
Thanks for your attention.
John.Boyer@rd.eng.bbc.co.uk.
------------------------------
Date: Mon, 13 Dec 1993 23:43:52 GMT
From: saimiri.primate.wisc.edu!sdd.hp.com!nigel.msen.com!usenet.ins.cwru.edu!howland.reston.ans.net!paladin.american.edu!afterlife!blackbird.afit.af.mil!tkelso@ames.arpa
Subject: Two-Line Orbital Element Set: Space Shuttle
To: ham-space@ucsd.edu
The most current orbital elements from the NORAD two-line element sets are
carried on the Celestial BBS, (513) 427-0674, and are updated daily (when
possible). Documentation and tracking software are also available on this
system. As a service to the satellite user community, the most current
elements for the current shuttle mission are provided below. The Celestial
BBS may be accessed 24 hours/day at 300, 1200, 2400, 4800, or 9600 bps using
8 data bits, 1 stop bit, no parity.
Element sets (also updated daily), shuttle elements, and some documentation
and software are also available via anonymous ftp from archive.afit.af.mil
(129.92.1.66) in the directory pub/space.
HST
1 20580U 90037B 93345.46188666 .00005419 00000-0 52909-3 0 3860
2 20580 28.4709 1.6300 0005714 286.6621 72.1424 14.90379666 1344
STS 61
1 22917U 93075A 93346.91666667 .00000086 00000-0 95796-6 0 332
2 22917 28.4721 352.2809 0006031 290.1471 332.0933 14.90687234 1570
HST Array
1 22920U 90037C 93345.32182143 .00012724 00000-0 11609-2 0 101
2 22920 28.4713 2.4416 0005168 87.7195 272.3549 14.93670423 1334
--
Dr TS Kelso Assistant Professor of Space Operations
tkelso@afit.af.mil Air Force Institute of Technology
------------------------------
End of Ham-Space Digest V93 #113
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