Satellites

FM Satellite Frequency Summary

AMSAT Fox-1 Satellites
	Uplink FM (67 Hz CTCSS)	Downlink FM	Comments
AO-91 (RadFxSat / Fox-1B)	435.250 MHz	145.960 MHz	Operational – Due to battery status, please do not attempt to access while in eclipse.
AO-92 (Fox-1D)	435.350 MHz	145.880 MHz	Sporadically active – Due not attempt to access if heard in eclipse
SO-50 (SaudiSat-1C)
	Uplink FM (67 Hz CTCSS)	Downlink FM	Comments
SO-50 (SaudiSat-1C)	145.850 MHz	436.795 MHz	Operational
SO-50 also has a 10 minute timer that must be armed before use. Transmit a 2 second carrier with a CTCSS tone of 74.4 Hz to arm the timer.
PO-101 (Diwata-2)
	Uplink FM (141.3 Hz CTCSS)	Downlink FM	Comments
PO-101 (Diwata-2)	437.500 MHz	145.900 MHz	Operational
FM transponder activated by schedule. The Amateur Radio Unit can operate either as an FM transponder or APRS digipeater.
CAS-3H (LilacSat-2)
	Uplink FM	Downlink FM	Comments
CAS-3H (LilacSat-2)	144.350 MHz	437.200 MHz	Operational, but rarely active
When FM transponder is not on, there is a telemetry beacon on 437.200 MHz . The FM transponder is on no set schedule. For real time updates about which mode the satellite is in
IO-86 (LAPAN-A2)
	Uplink FM (88.5 Hz CTCSS)	Downlink FM	Comments
IO-86 (LAPAN-A2)	145.880 MHz	435.880 MHz	Operational
Satellite is in a low-inclination low earth orbit and not visible north of about 30 degrees north or south of 30 degrees south. FM transponder operations are by schedule only.
AO-27
	Uplink FM	Downlink FM	Comments
AO-27	145.850 MHz	436.795 MHz	Operational
Currently active for four minutes on ascending and descending passes over mid-latitudes of the Northern Hemisphere
ISS Crossband Repeater
	Uplink FM (67 Hz CTCSS)	Downlink FM	Comments
ISS Crossband Repeater	145.990 MHz	437.800 MHz	Operational
See ARISS Status for status information
UVSQ-SAT
	Uplink FM	Downlink FM	Comments
UVSQ-SAT	145.905 MHz	437.020 MHz	In Orbit – Rarely Active

FO-118 (CAS-5A)
	Uplink FM	Downlink FM	Comments
FO-118	145.925 MHz	435.600 MHz	Operational
CW Beacon 435.570 MHz. 4.8k / 9.6k GMSK telemetry 435.650 MHz.
Tevel Mission
	Uplink FM	Downlink FM	Comments
Tevel-1 Tevel-2 Tevel-3 Tevel-4 Tevel-5 Tevel-6 Tevel-7 Tevel-8	145.970 MHz	436.400 MHz	In Orbit – Not Active
8 identical 1U CubeSats. Transmits 9k6 BPSK telemetry by default, can be commanded to operate as FM repeaters.
CAS-7A
	Uplink FM	Downlink FM	Comments
CAS-7A	145.950 MHz	435.455 MHz	Launch TBD
CW Beacon 435.430 MHz. 4.8k / 9.6k GMSK telemetry 435.480MHz. 1 Mbps GMSK Image Transmission 10460.000 MHz
CAS-7C
	Uplink FM	Downlink FM	Comments
CAS-7C	145.900 MHz	435.690 MHz	Launch TBD
CW beacon 435.715 MHz
CSSARC (Chinese Space Station)
	Uplink FM	Downlink FM	Comments
CSSARC V/u FM	145.875 MHz	436.510 MHz	Installation and Activation TBD
CSSARC U/v FM	435.075 MHz	145.985 MHz	Installation and Activation TBD
Also SSTV, Crew Voice, and Packet Frequencies
CRAC-01
	Uplink FM	Downlink FM	Comments
CRAC-01	435.900 MHz	145.980 MHz	Launch Q4 2023
TLM downlink on 145.995, voice and image downlink on 10455.00 MHz
BY70-8
	Uplink FM	Downlink FM	Comments
BY70-8	435.950 MHz	145.950 MHz	Launch Q4 2023
TLM downlink on 145.965 MHz, voice and image downlink on 10480.00 MHz
INSPIRE-Sat 7
	Uplink FM	Downlink FM	Comments
INSPIRE-Sat 7	145.830 MHz	435.200 MHz	Launch TBD
Telemetry 437.410 MHz

AO-7 Mode A – V/a Non-Inverting Analog SSB/CW
Uplink USB	145.850 MHz	through	145.950 MHz
Downlink USB	29.400 MHz	through	29.500 MHz
Active only in sunlight. Generally only active when periods of constant sunlight permit the 24 hour timer to switch between Modes A and B or when the satellite switches from Mode B. Beacon 29.502 MHz
AO-7 Mode B – U/v Inverting Analog SSB/CW
Uplink LSB	432.125 MHz	through	432.175 MHz
Downlink USB	145.925 MHz	through	145.975 MHz
Active only in sunlight. Beacon 145.975 MHz
AO-73 (FUNcube-1) – U/v Inverting Analog SSB/CW
Uplink LSB	435.130 MHz	through	435.150 MHz
Downlink USB	145.950 MHz	through	145.970 MHz
1k2 BPSK 145.935 MHz telemetry. Transponder active in eclipse. See AMSAT-BB for schedule updates.
CAS-4A – U/v Inverting Analog SSB/CW
Uplink LSB	435.210 MHz	through	435.230 MHz
Downlink USB	145.860 MHz	through	145.880 MHz
CW Beacon 145.855 MHz. Digital Telemetry 145.835 MHz 4.8kbps GMSK
CAS-4B – U/v Inverting Analog SSB/CW
Uplink LSB	435.270 MHz	through	435.290 MHz
Downlink USB	145.915 MHz	through	145.935 MHz
CW Beacon 145.910 MHz. Digital Telemetry 145.890 MHz 4.8kbps GMSK
EO-88 (Nayif-1 / FUNcube on Nayif-1) – U/v Inverting Analog SSB/CW
Uplink LSB	435.015 MHz	through	435.045 MHz
Downlink USB	145.960 MHz	through	145.990 MHz
Transponder only operational when satellite is in eclipse. FUNcube on Nayif-1 1.2kbps BPSK telemetry 145.940 MHz.
FO-29 (JAS-2) – V/u Inverting Analog SSB/CW
Uplink LSB	145.900 MHz	through	146.000 MHz
Downlink USB	435.800 MHz	through	435.900 MHz
Transponder activated by schedule and remains active until voltage drops below safe threshold. Currently in full sunlight. CW Beacon 435.795 MHz
FO-99 (NEXUS) – V/u Inverting Analog SSB/CW
Uplink LSB	145.900 MHz	through	145.930 MHz
Downlink USB	435.880 MHz	through	435.910 MHz
Active by schedule. Also uplinks on 145.910 MHz and downlinks on 435.900 MHz and 437.075 MHz for additional transceivers, including camera system.
FO-118 (CAS-5A) – H/u Non-Inverting Analog SSB/CW
Uplink USB	21.4275 MHz	through	21.4425 MHz
Downlink USB	435.4975 MHz	through	435.5125 MHz
CW Beacon 435.570 MHz. 4.8k / 9.6k GMSK telemetry 435.650 MHz.
FO-118 (CAS-5A) – V/u Inverting Analog SSB/CW
Uplink LSB	145.805 MHz	through	145.835 MHz
Downlink USB	435.525 MHz	through	435.555 MHz
CW Beacon 435.570 MHz. 4.8k / 9.6k GMSK telemetry 435.650 MHz.
JO-97 (JY1Sat) – U/v Inverting Analog SSB/CW
Uplink LSB	435.100 MHz	through	435.120 MHz
Downlink USB	145.855 MHz	through	145.875 MHz
Telemetry inoperative
XW-2A (CAS-3A) – U/v Inverting Analog SSB/CW
Uplink LSB	435.030 MHz	through	435.050 MHz
Downlink USB	145.665 MHz	through	145.685 MHz
CW Beacon 145.660 MHz. Digital Telemetry 145.640 MHz 9.6/19.2kbps, GMSK
XW-2B (CAS-3B) – U/v Inverting Analog SSB/CW
Uplink LSB	435.090 MHz	through	435.110 MHz
Downlink USB	145.730 MHz	through	145.750 MHz
CW Beacon 145.725 MHz. Digital Telemetry 145.705 MHz 9.6/19.2kbps, GMSK
XW-2C (CAS-3C) – U/v Inverting Analog SSB/CW
Uplink LSB	435.150 MHz	through	435.170 MHz
Downlink USB	145.795 MHz	through	145.815 MHz
CW Beacon 145.790 MHz. Digital Telemetry 145.770 MHz 9.6/19.2kbps, GMSK
XW-2D (CAS-3D) – U/v Inverting Analog SSB/CW
Uplink LSB	435.210 MHz	through	435.230 MHz
Downlink USB	145.860 MHz	through	145.880 MHz
CW Beacon 145.855 MHz. Digital Telemetry 145.835 MHz 9.6/19.2kbps, GMSK
XW-2F (CAS-3F) – U/v Inverting Analog SSB/CW
Uplink LSB	435.330 MHz	through	435.350 MHz
Downlink USB	145.980 MHz	through	146.000 MHz
CW Beacon 145.975 MHz. Digital Telemetry 145.955 MHz 9.6kbps, GMSK
TO-108 (CAS-6) – U/v Inverting Analog SSB/CW
Uplink LSB	435.270 MHz	through	435.290 MHz
Downlink USB	145.915 MHz	through	145.935 MHz
Transponder currently intermittent, operating approximately 2 seconds on, 5 seconds off. CW Beacon 145.910 MHz. 4.8k GMSK telemetry 145.890 MHz. Beacons currently carrier only.
RS-44 – V/u Inverting Analog SSB/CW
Uplink LSB	145.935 MHz	through	145.995 MHz
Downlink USB	435.610 MHz	through	435.670 MHz
CW Beacon 435.605 MHz
QO-100 (Es’hail-2/P4A) – S/x Non-Inverting Analog SSB/CW
Uplink USB	2400.000 MHz	through	2400.500 MHz
Downlink USB	10489.500 MHz	through	10490.000 MHz
Geostationary at 25.9 degrees east. Also digital wideband transponder: Uplink 2401.500 Mhz – 2409.500 MHz, Downlink 10491.00 MHz – 10499.00 MHz.
AO-109 (RadFxSat-2 / Fox-1E) – V/u Inverting Analog SSB/CW
Uplink LSB	145.860 MHz	through	145.890 MHz
Downlink USB	435.760 MHz	through	435.790 MHz
Transponder partially operational at low signal levels (approx 8 mW total RF output). 1.2kbps BPSK telemetry 435.750 MHz.
CAS-7A H/t – Launch TBD
Uplink USB	21.245MHz	through	21.275 MHz
Downlink USB	29.435MHz	through	29.465 MHz
CW Beacon 29.425 MHz.
CAS-7A H/u – Launch TBD
Uplink LSB	21.3125 MHz	through	21.3275 MHz
Downlink USB	435.3575 MHz	through	435.3725 MHz
CW Beacon 435.430MHz. 4.8k / 9.6k GMSK telemetry 435.480 MHz. 1 Mbps GMSK Image Data 10460.00 MHz
CAS-7A V/u – Launch TBD
Uplink LSB	145.865 MHz	through	145.895 MHz
Downlink USB	435.385 MHz	through	435.415 MHz
CW Beacon 435.430MHz. 4.8k / 9.6k GMSK telemetry 435.480 MHz. 1 Mbps GMSK Image Data 10460.00 MHz.
CAS-8A – Launch TBD
Uplink LSB	145.805 MHz	through	145.835 MHz
Downlink USB	435.510 MHz	through	435.540 MHz
CW Beacon 435.575 MHz. 4.8k / 9.6k GMSK telemetry 435.735 MHz. 192 kbps GMSK Image Data and 4.8k / 9.6k GMSK telemetry 2405.100 MHz. Inter-satellite link 2405.300 MHz.
CAS-8B – Launch TBD
Uplink LSB	145.840 MHz	through	145.870 MHz
Downlink USB	435.595 MHz	through	435.625 MHz
CW Beacon 435.580 MHz. 4.8k / 9.6k GMSK telemetry 435.750 MHz. 192 kbps GMSK Image Data and 4.8k / 9.6k GMSK telemetry 2405.100 MHz. Inter-satellite link 2405.300 MHz.
CAS-8C – Launch TBD
Uplink LSB	145.875 MHz	through	145.905 MHz
Downlink USB	435.630 MHz	through	435.660 MHz
CW Beacon 435.585 MHz. 4.8k / 9.6k GMSK telemetry 435.775 MHz. Inter-satellite link 2405.300 MHz.
CAS-8D – Launch TBD
Uplink LSB	145.910 MHz	through	145.940 MHz
Downlink USB	435.665 MHz	through	435.695 MHz
CW Beacon 435.590 MHz. 4.8k / 9.6k GMSK telemetry 435.800 MHz. Inter-satellite link 2405.300 MHz.
MESAT-1 – Launch Pending
Uplink LSB	145.910 MHz	through	145.940 MHz
Downlink USB	435.810 MHz	through	435.840 MHz
AMSAT LTM-1 Transponder – 1200 bps FoxTelem BPSK beacon 435.800 MHz
CAS-10 (XW-4) – V/u Inverting Analog SSB/CW
Uplink LSB	145.855 MHz	through	145.885 MHz
Downlink USB	435.165 MHz	through	435.195 MHz
CW beacon 435.575 MHz. Telemetry 435.725 MHz
REALOP – Launch TBD
Uplink LSB	145.860 MHz	through	145.890 MHz
Downlink USB	435.760 MHz	through	435.790 MHz
AMSAT LTM-1 Transponder – 1200 bps FoxTelem BPSK beacon 435.750 MHz

How to work FM satellites

SO-50

This satellite carries an FM transponder that receives signals on 145.850 MHz and retransmits them on 436.800 MHz (+/- 9 kHz Doppler shift). Operation is a little more complex that some other satellites since the transponder needs to initially be activated by a CTCSS (PL) tone of 74.4 Hz which starts a 10 minute timer and then a 67 Hz tone is used for the contact.

Note: If your radio has selectable FM filters use the wider filter designed for 5 kHz deviation FM which is sometimes referred to as a 25 kHz channel spacing filter.

The order of operation is: (allow for Doppler as necessary):
1) Transmit on 145.850 MHz with a tone of 74.4 Hz to arm the 10 minute timer on board the spacecraft.
2) Now transmit on 145.850 MHz (FM Voice) using 67.0 Hz within the 10 minute window.
3) Sending the 74.4 Hz tone again within the 10 minute window will reset the 10 minute timer.
You can set the memory channels in your handheld as follows:
Ch TX RX CTCSS

1. – 145.850 Timer Reset 74.4 Hz
2. – 145.850 436.805 67 Hz
3. – 145.850 436.800 67 Hz
4. – 145.850 436.795 67 Hz
5. – 145.850 436.790 67 Hz
6. – 145.850 436.785 67 Hz
At the start of the pass tune to 436.805 and then decrease the frequency during the 10+ minute pass.

SO-50’s downlink frequencysometimes appears to jump up in frequency, so be ready to occasionally tune up 5 kHz instead of down 5 kHz when trying to follow the downlink.

FO-29

Digital Transponder – Mode JD (1 Watt)

Uplinks: AFSK (FM) 1200 bps, AX.25, Manchester Encoded
- 145.850 MHz
- 145.870 MHz (the only 9600 bps uplink frequency)
- 145.890 MHz
- 145.910 MHz
Downlink: BPSK 1200 bps or FSK 9600 bps
- 435.910 MHz (also Digi-Talker frequency)

Analog Transponder – Mode JA (1 Watt)

Uplink: 145.900 – 146.000 MHz
Downlink: 435.800 – 435.900 MHz (inverted)

AO-73

– 435.150 – 435.130 MHz Uplink
– 145.950 – 145.970 MHz Downlink