UHF-Satcom.com - X-Band satellite monitoring                                                                                     updated: (13/04/2013 15:05:58 +0100)

New : handy X-band satellite beacon summary

Many satellites carry X-band (7250 MHz to 7750 MHz) payloads - mostly for military communications. Some military payloads share a common spacecraft bus with TV payloads, for example the Syracuse military payload aboard the French Telecom satellites. You are not likely to hear any clear audio or data traffic via these satellites, except for Sicral-1 which has two cross-strapped UHF to X-band / Ka-Band transponders. If you like exotic waveforms, then X-Band does offer the chance to see a lot of  data modes in use. Typically the traffic is either frequency hopping, time / code division multiplex, PSK, spread spectrum or IP DVB-S . You can however easily see these signals on a spectrum analyser or SDR. Details of X-Band receive hardware and ground segments have been split out into the X-Band Hardware page.

Regular readers of this page include Paradigm Communications who run the Skynet satellites for the British Military, and Thales-Group / Thales Computers who regularly visit this page for Syracuse info. Many other satcom companies and operators use this page for up to date beacon frequency information.

The SHF frequency list below has been compiled from internet sources and reception reports etc. All frequencies in the list have been verified and were active on the date given under the satellite name / orbital slot position.

If you are using this list, please contribute with updates, which can be sent anonymously via email to xband at uhf-satcom.com - beacon frequencies are particularly welcome along with satellite name / orbital slot etc.

Position	Freq(MHz)	Modulation Scheme / Comments (Frequencies logged by pjm,nils,trango & strider)
175 East	TBA
WGS-1

63 East		7314.175	300 kHz wide PSK (beam #1)
SATCOMBw Stage2	7315.575	400 kHz wide PSK (beam #1)
(8.08.11)	7352.175	300 kHz wide PSK, strong (beam #2)
		7353.575	400 kHz wide PSK, strong (beam #2)
		7418.300	3.6 MHz wide PSK
		7420.950	900 kHz wide PSK
		7422.000	900 kHz wide PSK
		7676.500	TT&C / Beacon with sidebands

60 East		7300.000	7.5 MHz wide PSK
WGS 2		7309.100	2.5 MHz wide PSK
(8.08.11)	7326.100	2.5 MHz wide PSK
		7338.500	4 MHz wide PSK
		7368.600	1.8 MHz wide PSK (weak)
		7412.600	2.3 MHz wide PSK
		7415.200	1.6  MHz wide PSK
		7418.000	2.7 MHz wide PSK
		7421.800	2.7 MHz wide PSK
		7426.000	3.3 MHz wide PSK
		7440.000	2.7 MHz wide PSK
		7451.000	14 MHz wide PSK very strong
		7476.900	3.5 MHz wide PSK strong
		7521.000	6 MHz wide PSK very strong
		7600.000	TT&C Data / Beacon +-1024kHz of carrier (Probably SGLS standard) 
		7610.750	1.6MHz wide PSK
		7622.650	1.6 MHz wide PSK
		7630.150	100 kHz wide PSK, strong
		7655.000	1.6 MHz wide PSK
		7656.575	800kHz wide PSK, strong
		7717.550	1.6 MHz wide PSK, strong

57 East		7583.000	PSK
DSCS 3-8	7600.000	TTC
(26.12.09)	7604.707	TTC
(No user tfc)	7674.701	Continuous carrier / Beacon

53 East		7256.200	Continuous carrier
Skynet 5B LHC	7267.220	PSK
(10.06.10)	7269.140	PSK
		7269.425	PSK
		7270.300	PSK
		7284.685	Framed PSK
		7284.735	Framed PSK
		7284.785	Framed PSK
		7284.875	Framed PSK
		7284.935	Framed PSK
		7285.560	Framed PSK
		7285.760	Framed PSK
		7285.960	Framed PSK
		7286.360	Framed PSK
		7287.300	PSK
		7293.000	PSK
		7295.000	PSK
		7330.560	PSK
		7331.090	PSK
		7334.415	PSK
		7334.730	PSK
		7335.130	PSK
		7340.700	Strong PSK, ~400 kHz B/W (June 2010)
		7405.000	~12 MHz wide PSK (June 2010)
		7430.000	weak continuous carrier (June 2010)
		7436.400	Very Strong PSK, ~200kHz wide (June 2010)
		7442.605	Continuous carrier
		7445.786	Continuous carrier
		7495.350	PSK (possible TT&C)
		7495.800	Beacon / Continuous carrier
		7495.845	TT&C (possibly regenerative) ~20kHz wide
		7496.160	TT&C generated on board satellite ~20kHz wide
		7559.800	1.5 MHz wide PSK (June 2010)
		7541.800	1.6 MHz wide PSK (June 2010)
		7571.500	1.4 MHz wide PSK (June 2010)
		7615.000	~7 MHz wide PSK (June 2010)
		7659.500	Possible spread spectrum (June 2010)
		7689.400	PSK
			
47 East		7268.000	PSK
Syracuse 3A LHC	7269.000	PSK
(27.12.09)	7272.000	PSK
650MHz offset	7273.000	Weak PSK
		7284.000	Beacon / Continuous carrier
		7300.300	PSK
		7301.100	PSK
		7302.750	PSK
		7326.500	PSK with pilot tone at CF
		7327.000	PSK with pilot tone at CF
		7328.200	PSK
		7329.700	PSK
		7378.000	PSK
		7433.100	Wide PSK
		7435.600	Wide PSK
		7500.500	PSK
		7507.500	Wide PSK
		7512.000	PSK
		7533.925	Narrow band PSK
		7554.075	PSK
		7554.400	PSK
		7554.750	PSK
		7612.200	PSK modem (idle)
		7616.700	PSK modem (idle)
		7720.000	DSSS TT&C (Identical to 7560/7580 from Telecom 2x)
		7737.500	TT&C generated on board the satellite (sidebands at +-40Khz, +-82KHz)

42 East		7410.000 	Beacon / Continuous carrier
Turksat 2A LHC	7431.000	Framed telemetry
(13.04.13)	7431.600	Framed telemetry
		7431.800	to
		7437.400	Framed telemetry every 200KHz
		7460.250	Strong PSK (idle)
		7522.000	Wideband PSK 
		7546.000	PSK
		7548.000	PSK
		7550.000	PSK
		7552.000	PSK
		7554.000	PSK
		7558.000	PSK
		7559.000	Very weak PSK
		7560.000	PSK
		7561.000	Very weak PSK
		7562.000	PSK
		7564.000	PSK
		7556.000	PSK
		7568.000	PSK
		
35 East		7249.995	Beacon / Continuous carrier (probably 10X 725~MHz used for TX/RX split)
Nato 4B	(NIVb)	7345.000	Beacon / Continuous carrier (strong)
No signals!	7365.000	Beacon / Continuous carrier (not always on)
(1.09.08)	7587.500	Beacon / Continuous carrier

35 East		7249.997	Beacon / Continuous carrier
Skynet 4E LHC	7326.800 	Beacon / Continuous carrier
(1.09.08)	7368.438	Continuous carrier
		7397.500	TT&C Beacon (verified) 800bps BPSK

29 East		7251.001	Beacon / Continuous carrier
Xtar-EU	LHC	7419.500 	Strong PSK
(25.12.07)	7420.000	PSK
		7508.250	PSK with multiple streams
		7574.500	Idle PSK modem
		7618.000	PSK
		7623.500	PSK
		7626.655	PSK
		7629.550	PSK
		7634.000	Massivly strong carrier
		7638.250	PSK
		7662.500	Carrier with sidebands
		7669.000	PSK - possibly DVB data
		7720.750	PSK carrier at CF
		7730.250	PSK carrier at CF
		7748.994	TT&C

20.7 East	7293.700	FHSS 6.42MHz wide
DSP-F18
(13.04.13)
		
16.3 East	7263.000	PSK 1.8MHz wide
Sicral LHC	7266.160	PSK 150KHz wide
PDF on Sicral	7393.200	UHF TPX cross-strap (off air)
(13.04.13)	7393.330	FM - pirates accessing Sicral, recordings here and here
712.5MHz offset	7393.350	UHF TPX cross-strap (off air)
		7408.100	UHF TPX cross-strap carrying low rate PSK or FSK data. 100KHz wide (off air)
		7408.250	UHF TPX cross-strap (off air)
		7500.000	TT&C (sidebands at 7499.937 and 7500.063 also framing once per second, carrier +-125KHz)
		7504.900	WFM relay of German language radio station (QRT when checked 16/7/2006)
		7514.999	Continuous carrier

13.2 East	7259.000	TPX test carrier
ComSatBW2	7291.000	TPX test carrier
(13.04.13)	7329.000	TPX test carrier
No user traffic	7370.000	TPX test carrier
		7416.000	TPX test carrier
		7452.000	TPX test carrier
		7464.000	TPX test carrier
		7512.000	TPX test carrier
		7515.000	TT&C 
		7520.000	TPX test carrier
		7550.000	TPX test carrier
		7567.000	TPX test carrier 43.6MHz wide TPX
		7678.50295	TT&C PSK s/c +- 128KHz, other at +- 16KHz (off air)

11.94 East	7249.375	Continuous carrier
Sicral-1B LHC	7260.000	PSK wide
(13.04.13)	7266.000	PSK wide
712.5MHz offset	7305.000	TTC beacon (sidebands +- 312KHz)
		7405.000	TTC beacon (sidebands +- 312KHz)
		7515.000	Continuous carrier
		7569.700	OQPSK 1.2MHz wide
		7572.902	Continuous carrier (weak)
		7574.210	PSK 200KHz wide
		7575.175	PSK 350KHz wide
		7577.050	PSK 650KHz wide
		7579.638	Spur
		7579.878	Spur
		7580.950	PSK 160KHz wide
		7581.200	PSK 160KHz wide
		7581.450	PSK 160KHz wide
		7582.100	PSK 350KHz wide
		7582.650	PSK 350KHz wide
		7583.475	PSK 600KHz wide
		7584.500	PSK 600KHz wide
		7589.075	PSK 300KHz wide
		7590.175	PSK 300KHz wide
		7591.775	PSK 1MHz wide
		7595.150	PSK 1.2MHz wide
		7599.275	PSK 1.2MHz wide
		7602.540	PSK 160KHz wide
		7602.840	PSK 160KHz wide
		7603.760	PSK 1MHz wide
		7605.350	PSK 1MHz wide
		7607.850	PSK 600KHz wide
		7609.630	PSK 160KHz wide
		7609.930	PSK 160KHz wide
		7610.540	PSK 120KHz wide
		7611.200	PSK 1MHz wide
		7612.260	PSK 1MHz wide
		7613.270	PSK 160KHz wide
		7613.510	PSK 160KHz wide
		7613.760	PSK 160KHz wide
		7614.000	PSK 160KHz wide
		7614.250	PSK 160KHz wide
		7614.740	PSK 160KHz wide
		7615.230	PSK 160KHz wide
		7615.720	PSK 160KHz wide	

6 East		7250.900	PSK
Skynet 5A LHC	7251.225	PSK
(27.12.09)	7251.650	PSK
		7252.400	PSK
		7253.100	Narrow PSK
		7253.400	Narrow PSK
		7253.800	PSK
		7254.250	PSK
		7254.600	PSK (cyclic frames)
		7257.500	PSK
		7259.200	2MHz wide PSK
		7260.850 	PSK
		7261.650	PSK
		7264.250	2MHz wide PSK
		7265.850	Narrow band Framed PSK modem
		7265.900	Narrow band Framed PSK modem
		7266.200	Narrow band Framed PSK modem
		7266.525	Narrow band Framed PSK modem
		7266.725	Narrow band Framed PSK modem
		7267.125	Narrow band Framed PSK modem
		7281.125	PSK
		7286.160	Narrow band Framed PSK modem
		7286.220	Narrow band Framed PSK modem
		7286.260	Narrow band Framed PSK modem
		7286.310	Narrow band Framed PSK modem
		7286.840	Narrow band Framed PSK modem
		7286.440	Narrow band Framed PSK modem
		7303.900	PSK
		7305.000	PSK
		7306.800	PSK (carrier at CF)
		7308.925	weak PSK
		7309.400	weak PSK
		7310.225	PSK
		7311.100	PSK
		7335.550	Idle PSK modem
		7336.600	PSK
		7336.925	PSK
		7344.590	strong PSK
		7344.900	strong PSK
		7345.150	strong PSK
		7345.700	Possible ranging tones (possibly from SN4C at 1.1W inclined orbit)
		7345.960	PSK
		7347.100	1.5MHz wide PSK
		7348.600	PSK
		7349.800	PSK modem in idle
		7390.965	Continuous carrier
		7405.750	Frequency hopping modem
		7433.100	narrow band PSK
		7433.200	narrow band PSK
		7434.350	1.75MHz wide PSK
		7458.400	PSK modem in idle
		7460.200	PSK modem in idle
		7463.200	PSK modem in idle
		7466.150	PSK
		7493.550	PSK
		7494.000	TT&C QPSK?
		7494.045	Narrow band Framed PSK modem
		7494.360	Narrow band PSK
		7741.675	Very strong PSK

6.7 East	7250.045	PSK 80KHz wide
Skynet 4C LHC	7331.500	TT&C
Inclined Orbit	
(13.04.13)

5 West		7255.000 - 7290	Frequency hopping PSK modem
Syracuse 3B LHC	7312.300	PSK - Carrier at CF
(13.04.13)	7320.000	Continuous carrier
650MHz offset	7332.000	PSK - Carrier at CF
		7333.050	PSK - Carrier at CF
		7339.000	PSK - Carrier at CF
		7353.508	PSK - Carrier at CF
		7383.650	PSK - Carrier at CF
		7385.300	PSK - Carrier at CF
		7421.350	QPSK 1623KSym/sec
		7425.000	PSK
		7458.500	QPSK 1230KSym/sec
		7466.000	PSK
		7473.800	QPSK 1230KSym/sec
		7636.150	QPSK 1230KSym/sec
		7638.900	QPSK 1230KSym/sec
		7705.000	DSSS TT&C Beacon (weak compared to user traffic)

12 West		7317.500	PSK
WGS-F3		7320.000	PSK
(13.04.13)	7352.400	PSK
	 	7600.000	Beacon, TTC +- 1024KHz subcarriers

17.9 West 	7346.600	QPSK 1623KSym/sec
Skynet 5C LHC	7356.400	QPSK 1623KSym/sec
(13.04.13)	7359.250	PSK
		7413.250	QPSK 1623KSym/sec
		7491.74904 	PSK
		7492.200 	Beacon / Continuous carrier
		7492.24404 	PSK
		7492.55904 	PSK
		7561.000	QPSK 2960 1/2 DVB-S PID16,60,62,100,200,900,902 (encrypted TCP/IP traffic)

18 West.	7293.700	+- 6.4MHz Frequency hopping modem
DSP-unknown LHC
(18.1.08)

30 West		7250.506	TT&C Beacon multiple sidebands
SpainSat LHC	7261.500	Weak PSK
		7262.300	Weak PSK
(13.04.13)	7300.000	Beacon / Continuous carrier
		7312.000 	Beacon / Continuous carrier
		7347.600	PSK with pilot tone at CF
		7348.000	Strong PSK with pilot tone at CF
		7351.200	PSK with pilot tone at CF
		7351.850	Narrow band PSK
		7353.350	PSK
		7353.750	PSK
		7354.400	PSK with pilot tone at CF
		7354.800	PSK with pilot tone at CF
		7355.150	PSK with pilot tone at CF
		7355.450	PSK with pilot tone at CF
		7355.680	PSK with pilot tone at CF
		7356.000	Strong PSK
		7356.270	PSK with pilot tone at CF
		7357.350	PSK with pilot tone at CF
		7357.750	PSK with pilot tone at CF
		7358.070	PSK with pilot tone at CF
		7358.430	PSK with pilot tone at CF
		7358.800	PSK with pilot tone at CF
		7359.230	PSK with pilot tone at CF
		7359.300	Narrow PSK with pilot tone at CF
		7360.320	PSK with pilot tone at CF
		7360.690	PSK with pilot tone at CF
		7361.000	PSK
		7361.330	PSK
		7361.850	PSK with pilot tone at CF
		7362.190	PSK with pilot tone at CF
		7362.950	PSK
		7363.860058	PSK
		7365.000	PSK
		7366.060	Narrow PSK
		7366.600	Idle PSK modem
		7368.775	PSK with pilot tone at CF
		7369.925	PSK
		7370.390	PSK
		7370.830	PSK with pilot tone at CF
		7371.380	PSK
		7372.150	PSK
		7373.200	PSK
		7374.300	PSK with pilot tone at CF
		7374.750	PSK with pilot tone at CF
		7375.070	PSK with pilot tone at CF
		7375.910	PSK with pilot tone at CF
		7376.150	PSK with pilot tone at CF
		7376.850	PSK with pilot tone at CF
		7377.220	PSK with pilot tone at CF
		7378.950	PSK with pilot tone at CF
		7379.570	PSK with pilot tone at CF
		7380.250	PSK with pilot tone at CF
		7380.850	PSK with pilot tone at CF
		7381.500	PSK with pilot tone at CF
		7382.950	PSK with pilot tone at CF
		7383.750	PSK with pilot tone at CF
		7384.400	PSK with pilot tone at CF
		7394.630	PSK with pilot tone at CF
		7395.160	PSK with pilot tone at CF
		7397.950	Wide PSK
		7400.150	Wide PSK
		7402.800	Wide PSK
		7404.960	Wide PSK with pilot tone at CF
		7406.640	PSK with pilot tone at CF
		7415.880	PSK with pilot tone at CF
		7418.100	PSK with pilot tone at CF
		7418.990	PSK with pilot tone at CF
		7420.330	PSK with pilot tone at CF
		7436.070	Strong PSK with pilot tone at CF
		7436.530	Strong PSK with pilot tone at CF
		7437.500	Strong PSK with pilot tone at CF
		7438.000	Very strong PSK with pilot tone at CF
		7438.300	Strong PSK with pilot tone at CF
		7493.000	Beacon / Continuous carrier
		7494.325	Narrow PSK
		7494.660	Idle PSK modem
		7532.000	PSK with pilot tone at CF
		7565.115	Narrow PSK modem
		7665.465	Wide PSK
		7665.970	Narrow PSK
	 RHC	7749.504	TT&C Beacon multiple sidebands

34 West		7250.001	Beacon / Continuous carrier
Skynet 4F LHC	7250.026	Continuous carrier
(13.04.13)	7425.000	PSK
		7425.300	PSK Narrow band
		7426.000	PSK Narrow band
		7426.100	PSK
		7426.300	PSK
		7428.800	PSK
		7429.130	PSK
		7429.950	PSK
		7432.600	PSK
		7432.900	PSK
		7434.500	PSK
		7435.000	PSK
		7437.900	PSK
		7438.190	PSK
		7456.300	PSK
		7456.700	PSK
		7458.500	PSK Narrow band
		7458.700	PSK
		7459.000	PSK
		7460.000	PSK
		7460.400	PSK
		7460.600	PSK
		7540.001	Beacon / Continuous carrier (strong)
		7557.000	PSK
		7569.875	PSK
		7620.500	PSK
		7621.000	PSK
		
52.5 West	7300.000	10MHz wide FHSS modem carrying low-rate PSK data, possibly the SCT
DSCS-3 LHC	7488.000	PSK
(13.04.13)	7489.000	PSK
		7600.000	TT&C (EC Beacon 1 Frequency - verified)
		7604.706	TT&C (EC Beacon 2 Frequency - verified)
		7749.125	Framed PSK
		7749.200	Two stations exchanging data (slight freq offset between TX's)
		7749.425	PSK
		7749.525	PSK

135 West	7600.000	TT&C (EC Beacon 1 Frequency - verified)
DSCS-3  7604.706 TT&C (EC Beacon 2 Frequency - verified)

DSCSIII Transponder layout (models A-1,A-2,B-4,B-5 and B-7)
		7250.000 to 7310.000	TPX1 60MHz bandwidth (SCT UHF crosslink)
		7335.000 to 7395.000	TPX2 60MHz bandwidth
		7420.000 to 7505.000	TPX3 85MHz bandwidth
		7530.000 to 7590.000	TPX4 60MHz bandwidth
		7615.000 to 7675.000	TPX5 60MHz bandwidth
		7700.000 to 7750.000	TPX6 50MHz bandwidth
					
DSCSIII Transponder layout (A-3,B-6,B-8,B-9,B-10,B-11,B-12,B-13 and B-14)
		7250.000 to 7300.000	TPX1 50MHz bandwidth (SCT UHF crosslink)
		7315.000 to 7390.000	TPX2 75MHz bandwidth
		7405.000 to 7490.000	TPX3 85MHz bandwidth
		7505.000 to 7590.000	TPX4 85MHz bandwidth
		7615.000 to 7675.000	TPX5 60MHz bandwidth
		7700.000 to 7750.000	TPX6 50MHz bandwidth

www.uhf-satcom.com 7580.000 MHz beacon from Telecom 2c at 3.1 East:

 

www.uhf-satcom.com 7395.000 MHz beacon from Skynet 4D at 34 West

 

7454.000 MHz - FHSS modem from 1West Skynet 4C
7622.900 MHz - Tracking Telemetry and Command from 1West Skynet 4C
7431.000 MHz from Turksat 42east - multiple framed carriers
7504.900 MHz from Sicral 16.2e - a German language radio feeder - note in the 'quiet' period you can see the 19 KHz stereo pilot either side of the main carrier.

This is now off the air.

7250.500 MHz RHC TT&C from the newly launched SpainSat, on station at 30w. A similar TT&C exists in LHC at 7749.500 MHz
7421.30245 MHz RHC Classic DSSS signal from Skynet at 1.1 west.
7402.930 MHz TT&C from Nato 4A at 17.8 West
7260.000 MHz TT&C from DSP-2 at 28.7 East. This TT&C is similar to that from Telecom / Syracuse, presumably a similar format in use.
7570.000 MHz transponder tests via Syracuse-3B at 5west - note the high phase noise of the programmable synthesiser.
7553.100 MHz signal from Skynet 4C at 1.1west. Possibly ranging? Also to the right is a normal PSK modem.