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KB9MMC > SAT 26.12.04 21:28l 177 Lines 6038 Bytes #999 (0) @ AMSAT
BID : ANS-361.S2
Read: GUEST
Subj: WSR 361 Part 2 12/26/2004
Path: DB0FHN<DB0RGB<DB0AAB<F6KFT<F6KMO<ON0BEL<CX2ACB<CX2SA
Sent: 041226/2021Z @:CX2SA.LAV.URY.SA #:55461 [Minas] FBB7.00e $:ANS-361.S2
From: KB9MMC@CX2SA.LAV.URY.SA
To : SAT@AMSAT
AMSAT NEWS SERVICE BULLETIN 361.S2 FROM AMSAT HQ
SILVER SPRING, MD, DECEMBER 26, 2004
TO ALL RADIO AMATEURS
BID: $ANS-361.S2
UO-11 OSCAR-11
Catalog number: 14781
Launched: March 1, 1984
Status: Semi-operational.
Downlink: 145.826 MHz FM (1200-baud AFSK)
Mode-S Beacon: 2401.500 MHz
December 16, 2004 Clive G3CWV Reports
During the period 24 November to 16 December 2004 the
145.826 MHz. beacon has been heard transmitting continuous
ASCII telemetry from 04 December to 14 December. During this
period good signals have been received, inspite of the problems,
which were reported last month. On several occassions the
signals have been stronger than usual.
The beacon operates under control of the watchdog timer.
Observations have indicated that the cycle is approximately
10.3 days ON followed by 10.4 days OFF. Assuming that this
cycle continues, the beacon should switch ON around
25/26 December.
Variations in the 14 volt line current have continued, mainly
between 755 and 880 mA. However during one pass of 12-December,
a value of 300 mA was recorded.
The internal temperatures have remained fairly constant, with
a little random variation. They are now 19.6C, 17C and 22.8C
for battery, telemetry electronics and command decoder,
respectively. Solar eclipse predictions indicate that the
satellite is now in continuous sunlight, which will continue
until the end of April next year.
The battery voltage has varied between 11.2 and 13.8 volts.
The average voltage has increased to 13.2 volts. The voltage
of 11.2 was observed during a pass on 10 December. On that
pass external and internal temperatures were noticeably lower
than normal, and the beacon signals were of poor quality.
The period of rotation about the Z axis had been determined
from the solar array currents. Values of between 264 and 510
seconds have been observed.
Users of OSCAR-11 should note that the date in the telemetry
is now advanced by FOUR days. The time is advanced by 20.4
minutes, and this error is increasing by about one minute
per year.
OSCAR-11 now operates in a default mode, controlled by the
watch-dog timer. The satellite transmits continuous ASCII
telemetry for approximately 10.3 days on 145.826 MHz., followed
by 10.4 days of silence. This regular sequence might be
interrupted by ground control, at any time.
At the present time the mode-S beacon 2401.5 MHz. and the
UHF beacon 453.025 MHz. are both OFF.
During the last few years I have received many enquiries
regarding soundcard software for decoding OSCAR-11 signals,
and from time to time there has been some discussion on
AMSAT-BB about the need for this software.
A suitable Windows program for displaying and capturing
OSCAR-11 data is now available. This is MIXW2, a general
purpose Amateur Radio data communication program written
by Nick Fedoseev UT2UZ.
You can download the program from Nick's website - www.mixw.net
or if this is not available, a google search for MIXW will
yield alternative sites. You need version, 2.07 or later.
The OSCAR-11 feature is un-documented at present in MIXW. I have
therefore prepared a package of instructions and sample files,
to help users. This is on the OSCAR-11 page of this website.
Also included is a filter program which enables the data captured
by MIXW to be used with the ASCII telemetry & WOD programs
on the website.
I have found that MIXW2 works very well on OSCAR-11, and
gives excellent results, comparable to a hardware decoder.
More information on UO-11 OSCAR-11 can be found at:
http://www.users.zetnet.co.uk/clivew/
[12292004]
=====
AO-16 PACSAT
Catalog number: 20439
Launch Date: January 22, 1990
Status: Semi-operational, the digipeater command is on and open for
APRS users.
Uplink: 145.90 145.92 145.94 145.96 MHz FM
(using 1200-baud Manchester FSK)
Downlink: 437.026 MHz SSB (1200-baud PSK)
Mode-S Beacon: 2401.1428 MHz
Broadcast Callsign: PACSAT-11
BBS: PACSAT-12
A WOD collection of current graphics along with general information
and telemetry samples can be found at:
http://www.telecable.es/personales/ea1bcu
[05092004]
=====
GO-32 TECHSAT-1B
Catalog number: 25397
Launch Date: July 10, 1998
Status: Operational
Downlink: 435.225 MHz FM (9600-baud FSK)
(435.325 n/a - temperature problems)
Uplinks: 145.850, 145.890, 145.930 FM
1269.700, 1269.800, 1269.900 FM
Broadcast Callsign: 4XTECH-11
BBS Callsign: 4XTECH-12
Roni, 4Z7DFC, reports:
today , staurday morning, Techsat1b BBS's is back .
1 Upload User , 8 Broadcast users .
Uplink freq. ; 145.859, 145.890, 1269.800
More information of GO-32 can be found at:
http://www.iarc.org/techsat/techsat.html
[WSR wishes to thank JE9PEL for this weeks information]
[11142004]
=====
NO-44 PCSAT
Catalog number: 26931
Launch Date: September 30, 2001
Status: Operational
Uplink/downlink: 145.827 MHz 1200 baud AX.25 AFSK via W3ADO-1
Aux/Uplink: 435.250 MHz 9600 baud via PCSAT-2 (off)
APRS Downlink: 144.390 MHz (Region 2)
PCSat is a 1200-baud APRS digipeater designed for use by stations using
hand-held or mobile transceivers. Downlinks feed a central web site at:
http://pcsat.aprs.org
The APRS-equipped PCSat was built by midshipmen from the U.S. Naval Academy
under the guidance of Bob Bruninga, WB4APR.
Bob WB4APR reports on November 09,2004:
PCsat working fine.
As a testament to the success of our new PCsat battery
isolation strategy, I captured telemetry this morning at 0446 local
showing the the A side battery was down to 1.15 V per cell
while the B side battery was at a healthy 12.2 volts per cell.
This was 34 minutes into eclipse with only seconds to go
before it re-entered sunshine.
PCsat is staying alive now because the isolated B side
remembers the low-power mode configuration mode even
if the A side runs down and resets. Please do not use PCsat
in the dark, and she should live a long time....
[11142004]
NNNN
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