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 Satellite Status  
Satellite status is listed with the following criteria:
  • Operational - the satellite achieves its primary mission most of the time
  • Semi-Operational - the primary mission is achieved at some times
  • Non-Operational - the primary mission is not achieved
  • Future Launch - the satellite has a scheduled launch date


OSCAR Satellite Status Summary As of 08 January, 2005

Name Beacons HF VHF UHF L-Band S-Band X-Band K-Band APRS Packet Comments
AO-51 (Echo)          Check Schedule
AO-7              Sunlit Ops Only
RS-15                Intermittent
AO-16                 Digipeating
LO-19             CW Beacon Only
SO-41                 Erratic
NO-44                 Low Batteries
SSETI Express                 May 2005

Note: Arrows indicate subsystem health, not uplink or downlink. For frequency information
click on the satellite name.

Operational Summary

Here is a basic summary of satellite status. The table that follows this status is a summary of
operational satellites that are or were recently popular. These tables lists only OSCAR satellites.

Operational AO-51, AO-27, FO-29, GO-32, SO-41, MO-46, SO-50,
Semi-Operational* AO-7, UO-11, RS-15, AO-16, LO-19, SO-41, NO-44
Non-Operational OSCAR III, OSCAR-IV, AO-5, AO-6, AO-8, RS-1, RS-2, AO-10, FO-12, RS-10/11, UO-14, UO-15, DO-17, WO-18, FO-20, AO-21 (RS-14), RS 12/13, UO-22, KO-23, AO-24, KO-25, IO-26, PO-28, MO-30, RS-17, PO-34, SO-33, SO-35, UO-36, AO-37, OO-38, WO-39, AO-40, SO-42, SO-43, NO-45, AO-49
Future Launch SSETI Express, VUSat (Hamsat)
Re-Entered OSCAR, OSCAR II, UO-9, AO-13,
Unknown (Researching)

AMSAT-OSCAR 51 (Echo or AO-51)
Analog Uplink: 145.920 MHz FM (PL - 67Hz)
1268.700 MHz FM (PL - 67Hz)
Analog Downlink: 435.300 MHz FM
2401.200 MHz FM
PSK-31 Uplink 28.140 MHz USB
Digital Uplink: 145.860 MHz 9600 bps, AX.25
1268.700 MHz 9600 bps AX.25
Digital Downlink: 435.150 MHz 9600 bps, AX.25
2401.200 MHz 38,400 bps, AX.25
Broadcast Callsign: PACB-11
BBS Callsign: PACB-12
Launched June 29, 2004

Status:  Operational
AO-51 is currently in PBBS mode only using the V/U digital AX.25 mode so that it may provide support for tsumani recovery efforts in South Asia. Please see the Echo operational schedule for additional information.

AMSAT-OSCAR 51 or Echo as it is more commonly known is a FM satellite carrying 4 VHF receivers, 2 UHF transmitters, a multimode receiver and a 2400MHz transmitter. It can handle voice and FSK data up to 76.8Kbps. Echo was launched into a low, sun-synchronous polar orbit approximately 850 km high. You must transmit a 67Hz PL tone in order to access the Echo voice repeater.

Please note the change in operational phone downlink frequency to 435.300 MHz.

For more information, see:


AMSAT OSCAR 7   (AO-7)  
Mode B and C Uplink 432.125 to 432.175 MHz CW/LSB
Mode B and C Downlink 145.975 to 145.925 MHz CW/USB (inverting)
Mode B Beacon 145.9775 MHz (CW telemetry)
Mode C Beacon 435.100 MHz (intermittent)
Mode A Uplink 145.850 to 145.950 MHz CW/USB
Mode A Downlink 29.40 - 29.50 MHz CW/USB (non-inverting)
Mode A Beacon 29.502 MHz (CW telemetry)
Launched 15 November 1974

Status:  Semi-operational
AO-7 became non-operational in mid 1981 due to battery failure .  In 2002 one of the shorted batteries became an open and now the spacecraft is able to run off solar panels. For this reason it is not usuable in eclipse and may not be able to supply enough power to the transmitter to keep from frequency modulating the signal. Lately AO-7 has favored Mode B almost exclusively.

Mode A is equivalent to Mode V/A
Mode B (8 Watts PEP) is equivalent to Mode U/V
Mode C is the same as Mode B however the power is 2.5 Watts PEP

There is also a 13 cm beacon at 2304.1 MHz, however this does not get turned on as it is outside the Amateur allocation for 13 cm.


UoSat OSCAR 11   (UO-11)  
Telemetry 145.826 MHz FM 1200 bps AFSK
Beacon 2401.500 MHz Carrier
Launched 1 March 1984

Status:  Semi-operational
OSCAR-11 now operates in a default mode, controlled by the watch-dog timer. The satellite transmits continuous ASCII telemetry for about 10 days on 145.826 MHz., followed by about 10 days of silence. This regular sequence might be interrupted by ground control, at any time.

The mode-S beacon is ON continuously, even when the VHF beacon is OFF, nominally transmitting an unmodulated carrier on 2401.5 MHz. There is however a VERY low level of AFSK modulation, (now a constant audio tone), which has been detected on strong signals. Telemetry indicates that the beacon has partially failed, and is delivering half power.


Radio Sport -15 (RS-15)
Uplink 145.858 to 145.898 MHz CW/USB
Downlink 29.354 to 29.394 MHz CW/USB
Beacon 29.352 MHz
Launched 26 December, 1994

Status:  Semi-operational
RS-15's beacon is occasionally heard and may be quite strong at times. At times the beacon is just a continuous carrier lasting up to 30 seconds, at other times it seems to be sending CW. There have been a few reports of hearing CW through the passband and Al N7EQF has reported having a CW QSO.


AMSAT OSCAR 16 (AO-16)  
Uplink 145.90 145.92 145.94 145.96 MHz FM (1200 baud Manchester FSK)
Downlink 437.025 MHz SSB (1200 baud PSK)
Beacon 2401.1428 MHz (Not Operational)
Broadcast call PACSAT-11
BBS call PACSAT-12 (Not Operational)
Launched 22 January, 1990

Status:  Semi-operational
AO-16 is on in digipeater mode only. The BBS is not operational, and the S-Band Beacon is also not operating.


LUSAT-OSCAR 19 (LO-19)  
Uplink 145.84, 145.86, 145.88, 145.90 MHz (1200-baud Manchester FSK - Not Operational)
Downlink 437.150 MHz SSB (1200 bps RC-BPSK - Not Operational)
Beacon 437.125 MHz
Broadcast call LUSAT-11 (Not Operational)
BBS call LUSAT-12 (Not Operational)
Launched 22 January, 1990

Status:  Semi-operational
LUSAT is sending out a strong CW beacon only. The BBS is not operational is not operating.


UoSat 5 (UO-22)  
Uplink 145.900 or 145.975 MHz FM 9600 baud FSK
Downlink 435.120 MHz FM
Broadcast call UOSAT5-11
BBS call UOSAT5-12
Launched 17 July 1991
Status: Semi-operational
UO-22 has been resetting and is not always turned on. SSTL has been troubleshooting. Periods of operation may be abruptly halted.

Operations are limited to times when the satellite is not in eclipse.


AMRAD OSCAR 27   (AO-27)
Uplink 145.850 MHz FM
Downlink 436.795 MHz FM
Launched 26 September 1993

Status: Operational
The AO-27 Team has reported that a new schedule has been uploaded. If the batteries hold then it should continue to run. If the batteries get too low then the software will turn the schedule off and the control operators will have to compute another one. The current schedule indicates that AO-27 is turned on for analogue operations during a 6 minute pass on the ascending pass. As in the past, the analogue mode is preceded and followed by 1 minute of digital TLM. A TLM stream is also transmitted for one minute on the decending pass.

The latest information on AO-27 from control operator Michael Wyrick, N3UC (former N4USI), can be found at http://www.ao27.org


Fuji OSCAR 29   (FO-29)  
Analog Uplink 146.000 to 145.900 MHz CW/LSB
Analog downlink 435.800 to 435.900 MHz CW/USB
Beacon 435.795 MHz (normally CW telemetry)
Digital Uplink 145.850, 145.870, 145.910 MHz FM
Digital Downlink 435.910 MHz 1200 baud BPSK or 9600 baud FSK
Digitalker 435.910 MHz FM
Launched 17 August 1996

Status:  Operational
Please send the reception reports to lab2@jarl.or.jp . Please use the subject line: 'FO-29reception report'.

Mineo, JE9PEL, has an FO-29 satellite telemetry analysis program that will automatically analyze all digital telemetry from the satellite (such as current, voltage and temperature). FO29CWTE is available at:


Gurwin TechSat1b (GO-32)
Digital Downlink 435.225 FM 9600 Baud FSK
Digital Uplinks 145.850, 145.890 FM 9600 Baud FSK
1269.700 , 1269.800 , 1269.900 (not operational)
Beacon Callsign 4XTECH-11
BBS Callsign 4XTECH-12
Launched 10 July 1998

Status:  Operational

Currently software is being uploaded to address software defects that were uncovered, however the GO-32 team is very responsive and outages have been quickly addressed. The GO-32 BBS server software and other improvments became operational as of July 1, 2004. Emily, W0EEC has reported that she was able to connect up to the BBS. Users might be able to communicate GO-32 while the BBS is on and enabled. Check the GO-32 Site and GO-32's beacons for updates.

The current beacon was copied transmitting:

4XTECH-12>STATUS:UTC: Tue Jul 06 17:40:05 2004 | Gurwin Techsat1B (V9.83)
4XTECH-12>STATUS:Gurwin Techsat1b send thanks to IARC and 4X1AS.
4XTECH-12>STATUS:BBS Mode:1 Upload User/5 Broadcasts , Uplink freq:145.890,145.850


AMSAT OSCAR 40   (AO-40)
Band         Analog uplinks         Analog downlinks
15 M 21.210 - 21.250 LSB, CW
12 M 24.920 - 24.960 LSB, CW
2 M 145.840 - 145.990 LSB, CW
70 cm 435.550 - 435.800 LSB, CW
23 cm (1) 1269.250 - 1269.500 LSB, CW
23 cm (2) 1268.325 - 1268.575 LSB, CW
13 cm (1) 2400.350 - 2400.600 LSB, CW 2400.225 - 2400.475 USB, CW
13 cm (2) 2401.225 - 2401.475 USB, CW
6 cm 5668.550 - 5668.800
3 cm 10451.025 - 10451.275
1.5 cm 24048.025 - 24048.275 USB, CW
S-Band Beacon 2401.323 MHz SSB AFSK
Launched 16 Nov. 2000

Status:  Non-operational
AO-40 has suffered a catastrophic failure, and although recovery efforts continue it is not likely to return to service. The latest status is available from the ANS News Page.


Saudi-OSCAR 41/SaudiSat 1A   (SO-41)
Uplink 145.850 MHz FM
Downlink 436.775 MHz FM
Launched 26 September 2000

Status:  Semi-operational
SO-41 is in operation when turned on by an internal timer that appears to be programmed to turn it on over major land areas. The repeater was operational in September 2003 but appears to be sporatic since that time.


PCSat   (NO-44)  
Uplink/Downlink 145.827 MHz FM 1200 Baud AFSK
Aux Uplink 435.250 MHz FM 9600 Baud AFSK
APRS Downlink 144.390 MHz FM (Region 2)
Launched 30 September 2001

Status: Semi-operational

NO44 is going through periods of being non-operational and being operational in sunlight. Its battery is too soft to provide the peak current necessary to transmit a packet. It can still be heard occassionally when sun angles are right (local noon in the northern hemisphere), but cannot be used with any reliability. Users are requested to not UPLINK to give better chance that control stations can continue to control it. (Status provided by Bob, WB4APR, 13 July 2004). For more information visit the PCsat Website.

NO-44 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.


TIUNGSAT-1   (MO-46)  
Uplinks 145.850,145.925 MHz 9600 baud FSK
Downlink 437.325 MHz 38.4K Baud FSK
Broadcast Callsign MYSAT3-11
Launched 26 September 2000

Status:  Operational

TiungSat-1 is Malaysia's first micro-satellite and in addition to commercial land and weather imaging payloads offers FM and FSK amateur radio communication.


Saudi-OSCAR 50/SaudiSat 1C   (SO-50)
Uplink 145.850 MHz FM
Downlink 436.795 MHz FM
Launched 20 December 2002

Status:  Operational
SO-50 carries several experiments, including a mode J FM amateur repeater experiment operating on 145.850 MHz uplink and 436.800 MHz downlink. SO-50 is operational for 10 minutes when turned on by the following procedure:

1) Transmit for 1-2 seconds on 145.850 MHz with a tone of 74.4 Hz to arm the 10 minute timer on board the spacecraft.

2) Next transmit on 145.850 MHz (FM Voice) using 67.0 Hz to key the repeater on and off within the 10 Minute window.

Note: Sending the 74.4 tone again within the 10 minute window will reset the 10 minute timer.


Amateur Radio on the International Space Station (ARISS)
Region 1 2m uplink 145.200 MHz FM
Regions 2 & 3 2m uplink 144.490 MHz FM
Cross Band Repeat Uplink 437.800 MHz FM
Worldwide downlink (All modes) 145.800 MHz FM
Worlwide Packet uplink 145.990 MHz FM
US Voice Callsign NA1SS
Russian Voice Callsigns RS0ISS, RZ3DZR
UI Digipeater Callsign ARISS
Bulletin Board Callsign RS0ISS-11

Status:  Operational

The current Expedition 10 crew is:

Commnader Leroy Chiao, KE5BRW
Flight Engineer Salizhan Sharipov

The ISS system has sometimes been turned on to Cross Band Repeat mode. In this mode it functions as a Mode B-FM repeater. Amateurs in the US and elsewhere have reported using the repeater with home stations and handheld radios with great success. The crew is also able to use the radio to transmit even when the system is in this mode.

While the system is in cross band repeat mode the packet system is turned off and vice-versa.

The ISS daily crew schedule can be found at http://spaceflight.nasa.gov/station/timelines/. Remember that the crew operates on UTC time. Also, all of the time line is NOT translated from Russian and posted.

Current ARISS News is available at the ARISS page in this website. Additional information is available at: http://www.rac.ca/ariss/


RS-22 (Mozhayets 4)
Beacons    435.352 CW, FM
145.840 CW, FM
Launched 27 September 2003

Status:  Operational
RS-22 a training satellite built by the Mozhaisky military academy in St. Petersburg, Russia. It was launched into a 680km circular orbit inclined to 98.2 degrees. It carries a CW beacon on 70cm that sends telemetry in the form of 16 groups of 5 to 7 characters framed by "rs22". Code is sent at ~5wpm with about 10 seconds between each group.


SSETI Express
Voice Uplink  437.250 FM 67Hz CTCSS
Voice Downlink     2401.840 FM
Packet Up/Downlink     437.250 9k6 packet
Packet Downlink    2401.840 38k4 packet
Launch Q1 2005

Status:  Future Launch
SSETI Express is nearing completion at the ESA technical centre in the Netherlands. Data modes will be primarily used for downlinking telemetry and data from the satellites experiments. ESA will be providing telemetry capture software for amateurs to use and will be offering a prize to the amateur station who provides them with the most telemtry after launch. The mode U/S FM voice transponder will require 67Hz tone access in a similar way to AO51 and will provide three channels of 256 bit telemetry encoded as DTMF tone bursts. S Band output is 3 Watts to 3 x 8dBic RHCP patch antennas. Launch is currently scheduled for not earlier than 18th May 2005. Latest information including integration photographs and a webcam in the cleanroom is at http://www.sseti.net - click on "missions" and then "express".


HamSat (VUSat)
Uplink 70cm LSB
Downlink     2m USB
Beacon 2m Unmodulated Carrier
2m Telemetry
Launch Q1 2005

Status:  Future Launch
HamSat has been constructed by AMSAT India and ISRO. It carries two 1watt linear transponders, and an FM beacon. The latest indication of launch is scheduled for sometime in February 2005. http://www2.jpl.nasa.gov/calendar/#0502



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Updated 8 Jan, 2005