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1993-05-23
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BID: $SPC0524
=========
SpaceNews
=========
MONDAY MAY 24, 1993
SpaceNews originates at KD2BD in Wall Township, New Jersey, USA. It
is published every week and is made available for unlimited distribution.
* ARSENE NEWS *
===============
According to telemetry sent by ARSENE the satellite is working perfectly.
The problem is that nobody has heard anything on VHF downlink frequency of
145.975 MHz. The control station FF1STA at ENSAE school in Toulouse has put
ARSENE in a mode with complete telemetry sent both in SHF downlink 2446.47
MHz and 145.975 MHz. This was set in order to allow a careful search for a
small signal on VHF band. The ARSENE team is asking for help from all radio
amateurs to find any VHF signal coming from ARSENE. The idea is that the
xtal of the local oscillator could have been broken and that the oscillator
could oscillate on any frequency from 140 to 150 MHz due to the Xtal
parasitic capacitor. The other hypothesis is that the coax was cut between
the VHF PA and antenna. Any report of a signal coming from ARSENE would
help. Telemetry signal basic data are at 128 Hz with 2048 Hz Manchester
encoded PSK at 128 bauds.
The following are new keplerian elements based on observed data from the
ARSENE team 12 hours after ARSENE apogee motor was fired on May 17, 1993
at 11:45 UTC.
ARSENE
1 83804U 93 56 B 93137.48960010 .00000000 00000-0 00000-0 0 0044
2 83804 1.0727 128.6322 2950120 138.8574 109.1916 1.41880000 134
Satellite: ARSENE
Catalog number: 83804 <- Note: NORAD number is 22654
Epoch time: 93137.48960010
Element set: 4
Inclination: 1.0727 deg
RA of node: 128.6322 deg
Eccentricity: 0.2950120
Arg of perigee: 138.8574 deg
Mean anomaly: 109.1916 deg
Mean motion: 1.41880000 rev/day
Decay rate: 0.0000e+00 rev/day^2
Epoch rev: 13
Checksum: 231
[Info via Bernard, F6BVP]
* BALLOON TO SATELLITE LINK *
=============================
The High Altitude Radio Project plans to launch a weather balloon
carrying a one watt Morse beacon transmitter transmitting on a frequency
of 145.890 MHz on Saturday June 12, 1993 at about 15:00 UTC. The launch
will be under the supervision of Joe, WB9SBD at his site in Hillsboro,
Wisconsin. If all goes well, the balloon will be at an altitude of between
80 and 100 thousand feet when its signal will be picked up by the RS10/11
satellite and relayed on a downlink frequency of 29.3852 MHz (+/- Doppler),
starting at 15:48 UTC.
RS10/11 will be on orbit # 29923, travelling from north to south and passing
over the Great Lakes at this time. Its downlink signal should be audible
over most of the continental US, except the extreme west coast, which will
be marginal. All of Canada, Greeland, and Central America and most of
Alaska, Iceland, and the northern part of South America will be covered.
The purpose of this flight is to:
1) "Just Do It!", since it is not believed that such a balloon to
satellite radio link has ever been attempted, and
2) to test the feasibility of using RS10/11 to help track a possible around
the world balloon flight to be launched by Joe, WB9SBD later in the year.
Special QSLs will be available for all those who receive the balloon uplink,
satellite downlink, or both signals. Reports should also include the date,
time, and frequency of the received signals. The balloon callsign will be
N9LTD and the calls of the other members of the launch and recovery team
will be transmitted periodically.
Please forward all reception reports to:
H.A.R.P.
PO Box 14748
Madison, WI 53708
The rain date for this event is Sunday, June 13, 1993, on RS10/11 orbit
# 29937. Launch attempts will continue every weekend until the launch is
successful. A list of usable passes, calculated from RS10/11 orbital
elements dated May 6 is provided below. An SSB ground station will be
parked a few KHz away from the balloon frequency to answer any questions
during the flight. (That is why the balloon's beacon frequency is in the
SSB portion of the satellite's transponder passband.)
Date Time (UTC) RS10/11 Orbit Number
Sat 12-Jun-93 15:48...16:02 29923 <-- First Attempt
Sun 13-Jun-93 16:18...16:32 29937
Sat 19-Jun-93 15:47...16:01 30019
Sun 20-Jun-93 14:32...14:46 30032
Sat 26-Jun-93 14:01...14:15 30114
Sun 27-Jun-93 14:31...14:45 30128
Sat 03-Jul-93 14:01...14:14 30210
Sun 04-Jul-93 12:45...12:58 30223 <-- Note 2 passes
Sun 04-Jul-93 14:31...14:44 30224 <-- on July 4!
Questions or comments regarding this experiment should be directed to Dave
Mullenix on packet at: N9LTD @ WD9ESU.WI.USA.NA, or to his telephone BBS
at (608) 249-7130, 300 to 14400 baud.
[Info via Dave Mullenix, N9LTD]
* FO-20 SCHEDULE *
==================
FO-20 will be in Mode JA from 10:50 UTC on 26-May-93 through 11:08 UTC on
27-May-93. The Mode JD packet mailbox will be in operation at all other
times.
[Info via Kazu, JJ1WTK/3]
* DOHOP RESULTS *
=================
Here is first report of DoHoP #3 operation.
Window 1: Nothing on this orbit due to too many users of RS-10.
Window 2: Better this than last window. Dave G4CUO worked Oscar DJ0MY,
DL1SM, and heard PA3FMG and IK7FGE.
Date Time Sat Lat Lon QRA Separation Worked or Heard
Sub Sat Approximate
============================================================================
16May93 12:54:45 RS14 45.1n 15.4e JN75QC
RS10 55.7n 5.6e JO15TQ 1661 kms DJ0MY
16May93 12:57:10 RS14 53.3n 17.3e JO83PH
RS10 47.6n 5.6e JN27TO 1201 kms IK7FGE
Window 3: On this orbit the transponder was switched off so there weren't
any contacts, but it was back on for the next orbit so the new
software routine seems to be working.
Window 4: All OK on this orbit and Dave G4CUO worked KM3B, KA8CNI, W8TX, and
F9SR. There are other signals on the tape which will have to be
noise filtered to make them clear.
16May93 16:25:40 RS14 49.4n 36.4w KN89EJ
RS10 52.5n 48.2w LO42CM 1037 kms KM3B 559
16May93 16:27:20 RS14 55.1n 34.9w KO75KC
RS10 46.9n 47.0w LN36MV 1438 kms F9SR 559
We await further reports from many stations in Europe and USA who heard DoHop
signals, but did not transmit. A very successful day with many thanks to
Andy, Leo and all in Moscow.
[Info via Ian, G0NKA, of the DoHoP group]
* THANKS! *
===========
Thanks to all those who sent messages of appreciation regarding SpaceNews,
especially:
DG0MA N0USE KZ1Z N1LHW SM6/W3IWI IW4CQI ON4KVI IW5CNC PS7KM
Also, greetings to Mikael Palm and all at the Swedish Space Corporation!
* 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
UUCP :...catfish.ocpt.ccur.com!ka2qhd!kd2bd
PACKET :KD2BD @ NN2Z.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