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- 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
- ******************************
-