home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
QRZ! Ham Radio 4
/
QRZ Ham Radio Callsign Database - Volume 4.iso
/
digests
/
space
/
940233.txt
< prev
next >
Wrap
Internet Message Format
|
1994-11-13
|
11KB
Date: Mon, 22 Aug 94 04:30:52 PDT
From: Ham-Space Mailing List and Newsgroup <ham-space@ucsd.edu>
Errors-To: Ham-Space-Errors@UCSD.Edu
Reply-To: Ham-Space@UCSD.Edu
Precedence: Bulk
Subject: Ham-Space Digest V94 #233
To: Ham-Space
Ham-Space Digest Mon, 22 Aug 94 Volume 94 : Issue 233
Today's Topics:
AMSAT
ANS-232 BULLETINS
Send Replies or notes for publication to: <Ham-Space@UCSD.Edu>
Send subscription requests to: <Ham-Space-REQUEST@UCSD.Edu>
Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the Ham-Space Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives/ham-space".
We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: 21 Aug 1994 17:29:42 GMT
From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!newsserver.jvnc.net!raffles.technet.sg!merlion.singnet.com.sg!merlion.singnet.com.sg!ianheng@network.ucsd.edu
Subject: AMSAT
To: ham-space@ucsd.edu
Dear Readers
Could someone please give me the information for subscribing to articles
from AMSAT.org . Thank you.
Your help is much appreciated.
Best regards
Ian Heng
9V1XA
------------------------------
Date: Sun, 21 Aug 1994 09:31:39 MDT
From: tribune.usask.ca!quartz.ucs.ualberta.ca!alberta!ve6mgs!usenet@decwrl.dec.com
Subject: ANS-232 BULLETINS
To: ham-space@ucsd.edu
SB SAT @ AMSAT $ANS-232.01
DOVE-OSCAR-17 STATUS REPORT
HR AMSAT NEWS SERVICE BULLETIN 232.01 FROM AMSAT HQ
SILVER SPRING, MD AUGUST 20, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-232.01
DOVE-OSCAR-17 (DO-17) Status Report
After extensive development and testing on the ground, another in a series
of planned software and hardware tests was activated in the DOVE (DO-17)
satellite on 8/3/94 at about 04:40 UTC.
This software sends ASCII telemetry for 90 seconds, then a sequence of 8
tones from the on-board digital-to-analog converter (DAC) followed by three
repetitions of the "Hi this is DOVE..." phrase from the voice synthesizer.
There is also a new line of status information sent occasionally for test
and debugging purposes called VSTAT. It contains data useful to developers
and engineers. The purpose of this software is to test the DAC, the two way
connection between the 68HC11 processor in the DOVE module and the V40 main
processor in the computer module, and various software components and
techniques.
The sequence of tones is created by sending digital values to the DAC that
generate a pseudo sign wave. It is not intended to simulate a musical
scale. However, the tone frequencies do span the nominal audio frequency
range of the modulator/transmitter string so they can be used to measure
frequency response of the spacecraft hardware.
While DOVE may not sound much different to listeners, hardware components
never before activated are in use, along with new software techniques
essential to the full exercise of DOVE's capabilities. It is worth noting
that some of the hardware used in this test has been idle for 4 1/2 years
in space, yet worked perfectly the first time.
With this critical test successfully completed, the development and
operations team expects continue to expand DOVE's capabilities.
[The AMSAT News Service would like to thank WD0E and the DOVE Team
for this bulletin item.]
/EX
SB SAT @ AMSAT $ANS-232.02
PHASE-3D INTEGRATION IN ORLANDO
HR AMSAT NEWS SERVICE BULLETIN 232.02 FROM AMSAT HQ
SILVER SPRING, MD AUGUST 20, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-232.02
PHASE-3D Spacecraft Integration To Has Begun
Dick Jansson, AMSAT-NA's Vice President for Engineering, announces that
progress preparing the Phase 3D spaceframe to receive its various modules
is progressing well. He adds that one of the recent factors which greatly
assisted this progress was the visit of Konrad Mueller DG7FDQ to the
Orlando, Florida Integration Facility. Dick said that Konrad was a
tireless worker during his short stay in Orlando, not getting any time to
visit the beach or even Disney World. Those American "slave drivers" kept
his attention glued to the Phase-3D task, Jansson commented. One of the
last of the tasks completed, before departing for the airport for his trip
home, was the bonding of final two equipment panels and heat pipes to the
main structure.
AMSAT-NA President Bill Tynan (W3XO) comments that we greatly appreciate
the corporation of AMSAT-DL in loaning Konrad Mueller to us so that this
vital work could be accomplished in record time and with the high quality
required in the construction of the Phase-3D satellite.
/EX
SB SAT @ AMSAT $ANS-232.03
PHASE-3D PRESENTATIONS AT SURREY
HR AMSAT NEWS SERVICE BULLETIN 232.03 FROM AMSAT HQ
SILVER SPRING, MD AUGUST 20, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-232.03
Phase 3D Presentations at the Surrey Satellite Conference
Last week's ANS bulletins presented summaries of some of the papers
presented at the International Amateur Satellite Conference held at the
University of Surrey in England between July 29 and August 1. This week's
bulletin includes more of the material presented on Phase-3D.
One interesting features presented on Phase-3D was in a paper by Dr. Karl
Meinzer DJ4ZC and read by Peter Guelzow (DB2OS). It concerned the "LEILA".
LEILA is a German acronym but basically it is an "anti-alligator device."
LEILA is designed to seek out extra strong signals in the passband. It
will initially transmit a Morse warning to the offender telling him or her
to reduce power. If that goes unheeded, it will insert 18 dB of attenuation
on the frequency of the offending signal. It was stated that LEILA will be
able to handle up to five such notches simultaneously.
Peter also discussed the two RUDAKs computer planned for Phase 3D-RUDAK-E
and RUDAK-U. The "E" stands for experimental and the "U" for users.
RUDAK-U will use AX25 pacsat protocols with six uplinks and one or two down-
links at 1200 and 9600 bps, and perhaps faster. The ramdisk should be 16
to 32 MBits. A mailbox is expected. RUDAK-E, similar to the computer on
AO-21, and is intended to support experiments with DSP front-ends for soft-
ware modems at low and medium speeds such as 1200, 9600 and 19200 bps.
Also on the cards is a regenerative modem faster than 64 Kbps and possibly
one modem at about 500 Kbps. This will probably use 2400 MHz for one of
the links and require 10 Watts of output from P3D and a 1 meter dish for
the ground user.
In his talk, G6GEJ presented details on the 2M transmitter he has been
building for Phase-3D. It is designed to operate from the 10.7 MHz I.F and
uses conventional linear amplification. Mike impressed the group with the
prototype of the unit, which he displayed at the meeting.
Hans van Groenendaal ZS5AKV described the 10 meter transmitter being
designed and built in South Africa. It will use Compatible Amplitude
Modulation (CAM) so that it can be received on simple short wave radios.
Transmissions are to consist of 15 minutes of digitally generated audio.
The system is intended mainly for educational purposes. It was noted that
test transmissions from ZS6SRL using CAM can be heard on 10.125 MHz at 0800
UTC and 1700 UTC Mondays. The signal is beamed toward Europe.
/EX
SB SAT @ AMSAT $ANS-232.04
WEEKLY OSCAR STATUS REPORTS
HR AMSAT NEWS SERVICE BULLETIN 232.04 FROM AMSAT HQ
SILVER SPRING, MD AUGUST 20, 1994
TO ALL RADIO AMATEURS BT
BID: $ANS-232.04
Weekly OSCAR Status Reports: 20-AUG-94
AO-13: Current Transponder Operating Schedule:
M QST *** AO-13 TRANSPONDER SCHEDULE *** 1994 Jul 11 - Sep 12
Mode-B : MA 0 to MA 90 | Omnis : MA 230 to MA 30
Mode-BS : MA 90 to MA 120 |
Mode-S : MA 120 to MA 122 |<- S beacon only
Mode-S : MA 122 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 | Move to attitude 230/0, Sep 12
==========================================================================
N QST *** AO-13 TRANSPONDER SCHEDULE *** 1994 Sep 12 - Dec 19
Mode-B : MA 30 to MA 150 |<- OFF Oct 22 - Nov 07 for eclipses
Mode-B : MA 150 to MA 190 | max duration 2h 12m
Mode-BS : MA 190 to MA 218 |
Mode-S : MA 218 to MA 220 |<- S beacon only
Mode-S : MA 220 to MA 230 |<- S transponder; B trsp. is OFF
Mode-B : MA 230 to MA 30 | Alon/Alat 230/0
Omnis : MA 250 to MA 140 | Move to attitude 180/0, Dec 19
The battery charge state is of paramount importance during the eclipse
seasons. As always the command team may have to have to make temporary
changes to the published schedule. In that case we will try to minimize
the inconvenience, setting Mode-B OFF from MA 230-256 in the first
instance.
==========================================================================
[G3RUH/DB2OS/VK5AGR]
RS-10: NO1R has been enjoying RS-10's Mode A operation at his QTH near
Boston. On several mid-Atlantic passes he has worked and confirmed G3ASM
in grid square IO94 and F9HR in grid square JN18 near Paris. Robert (F9HR),
appears to be very active and NO1R has heard him on both morning and evening
passes. Last week, DH5ROB/TF, answered his CQ from Iceland. NO1R used to
pass up these low angle mid-Atlantic passes, but now he has worked some of
of his best DX on these passes. NO1R also adds that all these DX contacts
were done using CW. [NO1R]
AO-16: AO-16 is up and running well. [WH6I]
KO-25: WH6I reports that KO-25 is up and running. He is having some trouble
getting reliable data from it, however, and can't seem to find the problem.
It's either in the bird, or he feels that he has got some new local inter-
ference on the downlink frequency. He is still checking. [WH6I]
KO-23: KO-23 On-Board-Computer (OBC) software crashed about one week ago.
The engineers at the KAIST are currently downloading memory images for
debugging purposes. Software reloading and packet service will not be
carried out until the code dump process finished, which hopefully be
completed by next Tuesday. [Hyungshin Kim (hskim@casaturn.kaist.ac.kr)]
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 @ N0QCU. 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
------------------------------
End of Ham-Space Digest V94 #233
******************************