UHF-Satcom.com - Accurate S-Band downlink frequency lists                                                                                 (25/12/2013 21:22:24 -0000)

At S-Band, the majority of satellite downlinks fall in the 2.2GHz to 2.3GHz band - there are exceptions to this as always. This band is specifically reserved for Space to Earth transmission of TT&C, ranging data and payload data. Most of the traffic could be described as uninteresting, as its either CW, PSK or spread spectrum, but there are some fantastic opportunities to perform some Doppler analysis in order to determine the satellite and it's orbit.

A simple 3.5 turn LHCP helical antenna centred on 2250MHz is described below - this antenna can be used with prime focus or offset dishes. It is possible to wind this antenna in the opposite sense (i.e. RHCP) to use as an S-Band omni (also pictured below, right) in order to monitor LEO and HEO satellites. Another omni directional antenna is pictured below right is a QFH as designed by Michael OH2AUE.

The dimensions for the helical are not overly critical, but should be within a couple of mm of those quoted. The ground plane can be made from PCB or aluminium, and it is recommended that a SMA or N-Type connector is used. The helix element can be made of 1.5mm or 2mm wire - the prototype used 2mm silver plated copper wire. The helix element can be made self supporting, but it is better practice to make a supporting rod from nylon or plastic. The first quarter turn of the helical should be spaced 2mm from the ground plane when using 2mm wire for the helix element. It is worth experimenting with the matching by soldering a copper strip to the first quarter turn in an attempt to improve the impedance match. Another alternative is to mount a metal block on the ground plane that can be swivelled near to the helical element to improve the matching. Work is progressing to assess the suitability of Sirius / XM active S-Band antennas for satellite DX'ing purposes - the results will be published here.

 

S-Band QFH (OH2AUE design)

S-Band 'omni' helix antenna

 

(above) Minikits VK5EME LNA tuned for 2250MHz

The antenna and preamp are extremely important at S-Band frequencies. For most of the loggings on this page, a 90cm dish, 3.5 turn S-Band helical feed and either a VK5EME preamp or G4DDK LNA were used. The dish provides the needed gain and directionality. An alternative to a helical feed is a patch antenna which can be used in cases where GSM telephone interference is high.

The preamps shown to the left are in use at various ground stations that contribute frequency information to this page. The enclosures have been custom milled out of a solid block of aluminium for mechanical rigidity reasons.

(above) G4DDK LNA adjusted for 2250MHz centre frequency

The preamp pictured at the bottom is a fairly new design by G4DDK with a measured noise figure of 0.30 - 0.33dB and 25 - 26dB associated gain at 2.3GHz.

The G4DDK LNA is currently under test on S-Band, but initial results appear to suggest that it delivers a worthwhile increase in SNR over the MiniKits LNA. The G4DDK LNA is supplied as a kit of parts which should take around 2 hours to build for an experienced constructor.

This LNA runs from a seperate +12V supply which is split out from the RF path using a mini-circuits wideband bias-T.

(above) LNA4ALL broadband LNA - great performance on S-Band

The last LNA here is from LNA4ALL and has been designed by Adam 9A4QV and is based on the PSA4-5043+ MMIC from Mini-Circuits. The LNA has around a 1dB NF at 2.2GHz and an associated gain of 13dB gain, making it suitable for use as a front end LNA. Noise figure results from actual testing will be performed shortly, and results included here.

The frequency charts below show results from investigations of what can be heard at S-Band - this list is the most comprehensive 'open source' list of S-Band downlink frequencies openly published. Most US satellites operate in the standard SGLS channels, frequency details of which can be found below, whilst non-US satellites generally have a varied band plan. Sven Grahn from Sweden has written an excellent page about his S-Band adventures, you can read about them here. Michael Fletcher from Finland has written up his s-band experiments with the JAXA / Selene moon orbiter, here. There is a collection of FFT plots from S-Band downlinks on the S-Band Gallery page. The frequencies listed below are actual 'off air' frequencies as received, and not guessed centre frequencies based on perceived Doppler shift.
S-Band sky survey - xBr, Freq, pjm, Greg, Trango, Lem and #hearsat. Note: All frequencies mentioned below have been verified. 

S-Band Satellite Downlink Frequencies (log started by xBr)

Frequency	Catalogue # / Satellite Name / last heard date dd/mm/yy
2183.110	26857 ICO-F2 - numerous carriers at 150KHz spacing (23/11/08)
2199.750	36797 AISSAT-1 - QPSK 256000bps FFT (EO portal link) (13/05/13)
2201.000	36508 Cryosat-2 FFT (EO portal link) (10/04/10)
2201.700	26959 BIRD-2 earth imaging (EO portal link) (02/11/07)
2202.000	31115 Beidou-M1 Chinese navigation satellite (17/11/07)
2202.500	19460 USA-32 FFT - not TX'ing all the time
2202.530	21949 USA-81
2203.200	24971 IRS-1D (EO portal link) (27/02/08)
2203.200	23751 IRC-1C (EO portal link) (02/10/07)
2203.200	25758 IRS-P4 (EO portal link) Oceansat-1 (05/10/07)
2203.200	26957 TES (EO portal link) (29/10/07)
2203.500	19460 USA-32 PSK - not TX'ing all the time
2203.700	34903 STSS-ATRR (03-10-09)
2203.750	38710 TET-1 BPSK 136880Bd, no viterbi, CCSDS frames 512bytes ID=0x20A FFT (EO portal link) (14/05/13)
2204.400	25940 CBERS 1 (EO portal link) (06/10/07)
2204.400	32062 CBERS-2B (EO portal link) (28/03/2010)
2204.400	27003 BADR-B (EO portal link) (28/10/07)
2205.930	20436 Spot-2 (29/02/08)
2206.100	37818 TacSat-4 (28/09/11 PJM)
2207.487	25157 GFO
2207.500	31140 NFIRE (29/10/07)
2207.500	10033 AMS-2 (wide sweeper) (30/10/07)
2207.530	37875 YaoGan-12
2208.000	22490 SCD-1 SatÚlite de Coleta de Dados (EO portal link)
2208.000	25504 SCD-2 SatÚlite de Coleta de Dados (EO portal link)
2208.000	28368 DEMETER Wideband (EO portal link) (27/02/08)
2208.000	29107 Cloudsat wideband data (EO portal link) (21/10/07)
2208.163 	26708 Odin (Swedish Science) (EO portal link)
2208.725	39179 ShenZhou-10 (Phase Mod with 384KHz DBPSK 16000Bd subcarrier, 8192bit frame)
2209.580	25789 Quikscat (EO portal link) (21/10/07)
2209.800	33321 Huan Jing-1B
2210.000	26102 MTI
2210.000 	30777 CFEsat (05/11/07)
2211.000	33396 THEOS (EO portal link) (12/10/08)
2211.000	27391 GRACE (EO portal link) (13/11/07)
2211.900	38354 Yaogan-15 (02/06/12)
2212.500	27640 Coriolis (EO portal link) (01/10/07)
2212.800	23827 IRS-P3 (EO portal link) (13/10/07)
2212.800 	29092 Yaogan-1 (06/11/07)
2212.800	32289 Yaogan-3 (16/11/07)
2213.500	38348 Dragon C2/C3 (27/05/12)
2214.950	25635 Orsted (sound sample) (19/02/08)
2215.000	25280 TRACE (30/10/07 - not on over Europe)
2215.000	25560 SWAS (Freq - not on over Europe)
2215.000	27642 Icesat (02/11/07)
2215.000	27421 Spot-5 (29/09/07)
2215.000	27540 Integral (01/10/07 150000Km altitude)
2215.000	24285 FAST (Freq)
2215.000	29049 Formosat 3C (EO portal link) (27/02/08) - went off air when out of range of Greenland.
2215.000	29050 Formosat 3D (EO portal link) (29/10/07)
2215.000	29052 Formosat 3F (EO portal link) (29/10/07)
2215.900	26997 Jason 1 (LHCP downlink)
2214.900	27370 HESSI (10/11/07)
2216.000	36036 SMOS 838878 QPSK FFT (EO portal link) (12/05/2013)
2216.000	38348 Dragon C2/C3 (27/05/12)
2216.550	31490 Yaogan-2 (29/03/2010)
2216.550	33446 Yaogan-4 (05/11/2010)
2216.550 	36110 Yaogan-7 (30/03/2010)
2216.550	37165 Yaogan-11 (25/09/2010)
2217.500	25544 Space Shuttle (Shuttle TX's when docked to ISS)
2218.000	25260 Spot-4 - worldwide crop monitoring (EO portal link) (27/02/08)
2218.000	27421 Spot-5 (EO portal link) (29/09/07)
2218.000	36414 Yaogan-9B (29/03/2010)
2220.000	33492 GOSAT/IBUKI (29/01/09)
2220.500 	33456 Yaogan-5 (29/03/10)
2222.500	28054 DMSP F16 USA 172 (EO portal link)
2222.500	29522 DMSP F17 USA 191 (EO portal link)
2222.500	35951 DMSP-F18 Realtime Data Smooth 177.5kbps 1/2 BPSK (EO portal link) (28/02/11)
2222.500	28095 NOSS 3-2 USA 173
2222.500	26905 NOSS 3-1
2222.500	28537 NOSS 3-3 USA 181
2222.500	31701 NOSS 3-4
2222.500	21147 LaCrosse-2 USA 69 (31/10/07)
2222.500	25017 LaCrosse-3 USA 133 
2222.528	27640 Coriolis P98-2 - wind vector measurements
2223.000	33497 SDS-1 (Japan)
2224.060	33386 Shenzhou-7 Chinese manned mission (27/09/08)
2224.600	33408 SHI JIAN 6E (SJ-6E)
2224.915	25989 XMM-Newton
2225.000	27386 Envisat - Earth environment monitoring (27/02/08)
2225.000	23560 ERS-2 (19/02/08)
2225.500	38007 ELISA-W11 (02/06/12)
2226.400	*GPS* BIIR satellites - DASS Transponder 406MHz up (xBr, r00t, pjm)
2226.500	23605 Helios-1A (19/02/08) ** Needs confirmation **
2226.500	28382 DOUBLESTAR (TC-2)
2226.666	37789 NIGERIASAT 2 BPSK 38400bps (03/06/12)
2227.500	##### GPS - several GPS satellites have a beacon on this frequency
2227.530	28737 SHI JIAN 7 (SJ-7)
2228.400	37781 Haiyang 2 (03/06/12)
2229.600	28413 SHI JIAN 6A (SJ-6D) (29/03/10)
2230.000 	23710 Radarsat 1 - Canadian synthetic aperture radar (EO portal link) (14/10/07)
2230.000	32382 Radarsat 2 - Canadian synthetic aperture radar (EO portal link)
2230.000	29499 METOP-A weather satellite (Uplink 2053.4 MHz)
2230.000 	31598 Cosmo-Skymed (EO portal link) (28/03/10)
2230.000 	27942 UK-DMC (13/11/07) PSK
2230.000	32376 Cosmo-Skymed 2 (EO portal link) (28/03/10)
2230.000	33412 Cosmo-Skymed 3 (EO portal link) (02/06/12)
2230.300	28497 ESSAIM-4 wideband PSK (29/10/07)
2231.595 	27843 MOST (wideband PSK data) (20/10/07)
2232.000	27858 Scisat-1 (13/11/07)
2232.050	29653 Tacsat 2 (30/01/10)
2232.500	26905 NOSS 3-1 USA 160 (03/01/08)
2232.500	28095 NOSS 3-2 USA 173 (30/10/07)
2232.500	28537 NOSS 3-3 USA 181 (19/02/08)
2222.500	35951 DMSP-F18 Realtime Data Smooth 177.5kbps 1/2 BPSK FFT (EO portal link) (28/02/11)
2232.51673	29249 USA-184
2233.333	28890 Bejing-1 DMC (29/10/07)
2233.333	35682 UK-DMC2 (13/08/09)
2233.377	37790 NigeriaSat-X BPSK 38400bps (03/06/12)
2234.400	39091 BRITE-Austria BPSK (25/12/13)
2234.400	39431 BRITE-Poland BPSK (25/12/13)
2235.000	26958 Proba-1 FFT (EO portal link) (27/02/08)
2235.000	39159 Proba-V 329900 Baud BPSK FFT (EO portal link) (09/05/13)
2235.000 	36037 Proba-2 FFT (EO portal link) (09/05/13)
2235.100	39150 GaoFen-1 FFT (06/06/13)
2235.790	28414 SHI JIAN 6B (SJ-6B)
2235.850	37179 SHI JIAN 6 (current designation unknown) (06/09/10)
2236.570	38046 Ziyuan-3 (19/05/12)
2236.666	27941 Nigeriasat-1 (29/10/07)
2237.490	24737 DSP-F18 
2237.495	90060 (failed DSP-F19 on GTO)
2237.500	21798 DMSP F11 (EO portal link)
2237.500	23533 DMSP F13 USA 109 (EO portal link)
2237.500	25991 DMSP F15 USA 147 (EO portal link)
2237.500	28054 DMSP F16 USA 172 (EO portal link)
2237.500	29522 DMSP F17 USA 191 (EO portal link)
2237.500	10033 AMS-2 (wide sweeper) (30/10/07)
2237.501	DSP-F9 (90050) drifting GEO
2237.518	DSP-F7 (90067) drifting GEO
2237.530	90073 drifting GEO DSP??
2237.530420	DSP-F6 (90041) drifting GEO
2237.540300	DSP-F10 drifting GEO (162s unlock period)
2238.450	28496 ESSAIM-3 wideband PSK (29/10/07)
2240.000	39160 VNREDSAT-1 DQPSK 25000 and DQPSK 384600 FFT (09/05/13)
2241.600	33320 Huan Jing-1A - PSK on sidebands (05/11/10)
2242.450	24680 USA-129 (30/09/10)
2242.482	26473 LaCrosse-4
2242.500	----- USA-186 
2242.500	90027 USA-179 (also tx's on 251.7, 256.375 MHz)
2242.500	90025 USA-137 (SDS-3 F1)
2242.500	----- SDS-3 F5 FFT
2242.500	90026 ZiYuan-3 ZY3
2242.500	90004 SDS-2 possibly - weak wobbler
2242.500	90020 SDS-2 possibly
2242.500	90028 USA-125 (SDS-2 F4)
2242.500	10033 AMS-2 (DMSP F1) (EO portal link)
2242.500	24753 DMSP F14 (EO portal link)
2242.500	----- USA224 / NROL49 
2242.501945 39232 NROL-65 (29/08/13)
2242.540	37163 FIA Radar Satellite (25/09/10)
2245.000	34602 GOCE (13/05/13)
2245.700	28649 IRS-P5 Cartosat-1 (EO portal link) (19/02/08)
2245.700	29710 IRS-2A Cartosat-2 (EO portal link) (27/02/08)
2245.700	32783 IRS-2B Cartosat 2A (EO portal link) (05/11/10)
2245.700	36795 Cartosat 2B (EO portal link) (25/09/10)
2246.704	33312 RapidEye 2 (EO portal link) 
2247.500   	26374 STEP-2 (21/10/07)
2247.500	35937 STSS USA-208 (03/04/10)
2247.500	26374 TSX-5 (only TX over USA)
2248.500	36119 WISE (03/04/10)
2249.000	26464 Cluster FM8 - solar wind and magnetosphere experiment (EO portal link) (29/09/07)
2249.500	23233 DMSP F12 (EO portal link)
2249.500	23533 DMSP F13 USA 109 (EO portal link)
2249.500	25991 DMSP F15 USA 147 (EO portal link)
2249.500	28054 DMSP F16 USA 172 (EO portal link)
2249.500	29522 DMSP F17 (EO portal link)
2249.500	29651 USA-193 (xBr) (31/10/07)
2250.000	28051 IRS-P6 ResourceSat-1 (05/11/10)
2250.000	37387 ResourceSat-2 (EO portal link) (23/04/11)
2250.000	23323 IRS-P2 Oceansat-1 (13/10/07)
2250.000	35931 Oceansat-2 (EO portal link)
2250.000	26033 Acrimsat (EO portal link)
2251.400	37180 SHI JIAN 6 (current designation unknown) (06/09/10)
2251.450	36088 SHI JIAN 11-01 (31/03/2010)
2251.500	33409 SHI JIAN 6F (28/03/2010)
2252.500	23233 DMSP F12 wideband (EO portal link) (01/10/07)
2252.500	23533 DMSP F13 USA 109 (EO portal link)
2252.500	24753 DMSP F14 (EO portal link) (29/10/07)
2252.500	25991 DMSP F15 USA 147 wideband data (EO portal link)
2252.500	10033 AMS-2 (wide sweeper) (30/10/07)
2252.500	28054 DMSP F16 USA 172 (EO portal link)
2252.500	29522 DMSP F17 1024kbps BPSK encrypted (EO portal link) (13/05/13)
2252.500	35951 DMSP-F18 (EO portal link) (31/03/10)
2252.525	SKYNET-2B (drifting GEO)
2254.345	37388 YouthSat (22/04/11) 4Kbps TTC or 8Mbps payload data
2256.000	26463 Cluster FM5 - solar wind and magnetosphere experiment (EO portal link) (29/09/07)
2256.000	38251 Beidou-M4 (02/06/12)
2256.220	28939 Astro-F Akari (01/10/07)
2256.220	28773 Astro-E2  (01/11/07)
2256.220	29506 SHI JIAN 6D (SJ-6D) (04/11/07)
2256.220	29505 SHI JIAN 6C (SJ-6C)
2256.220	29479 Hinode Solar-B (21/10/08)
2257.530	21949 USA-81 (also transmits on 258.150 MHz) (19/02/08)
2257.500	DSCS III-F1 drifting GEO
2260.800	27392 GRACE-2 (13/11/07)
2262.5309	36868 AEHF-1 in GTO (12/10/10)
2265.000	23802 Polar - HEO (05/10/07)
2265.000	25789 Quikscat (21/10/07)
2265.000	25544 ISS CCSDS data (possibly TDRSS uplink)
2265.000	38348 Dragon C2/C3 (27/05/12)
2266.300	36121 Yaogan-8 (29/03/10)
2267.500	25991 DMSP F15 USA 147 (EO portal link)
2267.500	23533 DMSP F13 USA 109 PSK (EO portal link)
2268.000	36605 Tandem-X (02/06/12)
2268.400	33105 Jason 2 OSTM
2268.465	29108 Calipso / Parasol / Cloudsat (21/10/07)
2268.500	22076 Topex / Poseidon (20/06/08)
2269.200	38012 Pleiades 1 (02/06/12)
2270.000	38051 Chibis-M (16/02/12)
2270.000	26411 Cluster FM7 - solar wind and magnetosphere experiment (EO portal link) 
2272.500	35938 STSS demo 2 satellite USA 209 (05/04/10)
2272.500	28980 ST5-A (04/04/10)
2273.000	29658 SAR-Lupe-1 TT&C / ISL link (known as Magnifying Glass) (EO portal link) (01/10/07)
2273.000	31797 SAR-Lupe-2 TT&C / ISL link (known as Magnifying Glass) (EO portal link) (01/10/07)
2273.000	32283 SAR-Lupe-3 TT&C / ISL link (known as Magnifying Glass) (EO portal link) (01/11/07)
2273.000	32750 SAR-Lupe-4 TT&C / ISL link (known as Magnifying Glass) (EO portal link) (07/04/10)
2273.500	27430 Haiyang-1B (05/11/10) 
2273.500	27651 SORCE BPSK 8000Bd vit 1/2 diff-enc; CCSDS frames; 9952bit long FFT (EO Portal link)
2276.450	37874 TX 1 PM 65536Hz sideband (03/06/12)
2277.000	26410 Cluster FM6 - solar wind and magnetosphere experiment (EO portal link) 
2278.377	24912 ACE (Advanced Composition Explorer at L1 - 1.5M km from Earth) (02/10/07)
2277.500	26905 NOSS 3-1 USA 160
2277.500	28095 NOSS 3-2 
2277.500	DSCS III-F5 drifting GEO
2277.520	29249 USA-184
2280.000	31698 Terrasar-X TT&C - German X-band synthetic aperture radar (01/10/07)
2280.000	26405 CHAMP (EO Portal link) (19/02/08)
2280.000	36605 Tandem-X (02/06/12)
2280.500	19822 Edos-D / Akebono - 1.5MHz wide, multiple sidebands
2282.500	38011 SSOT (02/06/12)
2282.500	29678 COROT wideband data (01/10/07)
2282.500	31304 AIM - Polar Mesospheric Clouds study
2282.500	26953 Quickbird-2 (06/10/07)
2282.500	19460 USA-32 (Wav recording by xBr FFT (03/06/13)
2282.500	23851 MSX (1kHz tone) (13/11/07)
2284.800	33494 SPRITE-SAT (Japan)
2285.000	33494 SPRITE-SAT (Japan)
2285.200	33494 SPRITE-SAT (Japan)
2285.525	37167 Zheda Pixing 1C (15/10/10)
2287.500	25544 ISS CCSDS data (possibly TDRSS uplink)
2287.500	28485 SWIFT (1/11/07)
2287.500	28230 Gravity Probe-B (11/11/07)
2287.500	25682 LANDSAT-7 (possibly only on over the north west USA) (EO portal link)
2287.500	14780 LANDSAT-5 (possibly only on over the north west USA) (EO portal link)
2289.625	37166 Zheda Pixing 1B (15/10/10)
2292.960	39370 Magalyaan Indian Mars Orbiter (09/11/13)
2295.000	26631 EROS-A1 (27/02/08) - may be commanded from Kiruna E/S
2295.000	29079 EROS-B (13/11/07) - may be commanded from Kiruna E/S
2295.560	32289 Yaogan-3 (02/06/12)
2296.520	34839 Yaogan-6 (05/11/10)		
2298.480	39370 Magalyaan Indian Mars Orbiter (09/11/13)
2401.200	28375 AO-51 Amateur radio satellite (not always on S-Band)
		
HEO's / Molniya orbit (log started by xBr) Sven Grahn has written an excellent article on tracking OKO.
2254.800	36828 BEIDOU IGSO 1 (30/09/10)
2254.808	37384 BEIDOU IGSO 3 (15/04/11)
2298.000	Cosmos-2388/2393 channel A. (OKO early warning)
2304.000	Cosmos-2388/2393 channel B. (OKO early warning)
2286.000	COSMOS-2422
2292.000	COSMOS-2422
2320.1865	26390 Sirius-1 TT&C (20/02/10) 9600BPSK +48KHz subcarrier, 2048bit frame. +72KHz subcarrier Sync=FAF320B5
2320.191	26485 Sirius-2 TT&C (20/02/10) 
2322.290	Sirius-1,2,3 QPSK audio downlink
2326.249	26390 Sirius-1 TT&C (23/11/08)
2329.3825	26483 Sirius-2 TT&C (20/03/08)
2329.400	26626 Sirius-3 TT&C (20/03/08)
		2330.710	Sirius-1,2,3 QPSK audio downlink
		
Lunar Orbiter Downlink Frequencies
Frequency	Catalogue # / Satellite Name / last heard date dd/mm/yy
2210.800	37174 Chang'e'2 Chinese lunar orbiter (02/11/10)
2212.000	32054 KAGUYA R-Satellite (10/06/09 impact)
2212.000	32054 KAGUYA VRAD-Satellite (10/06/09 impact)
2217.120	33405 Chandrayaan-1
2218.000	32054 KAGUYA R-Satellite (10/06/09 impact)
2218.000	32054 KAGUYA VRAD-Satellite (10/06/09 impact)
2230.800	33405 Chandrayaan-1 (Jan 2009)
2234.533	32274 Chang'e'1 Chinese lunar orbiter (27/10/07)
2234.520	37174 Chang'e'2 Chinese lunar orbiter (06/09/10)
2241.579	32054 KAGUYA R-Satellite (10/06/09 impact)
2260.416	32054 KAGUYA R-Satellite (10/06/09 impact)
2260.416	32054 KAGUYA VRAD-Satellite (10/06/09 impact)
2263.602	32054 KAGUYA main spacecraft downlink (10/06/09 impact)
2271.200	32315 Lunar Reconnaissance Orbiter (19/06/09)
2279.5272	37801 Grail-A
2280.6146	37802 Grail-B
2283.840	33405 Chandrayaan-1
2287.313	32054 KAGUYA R-Satellite (10/06/09 impact)
2287.313	32054 KAGUYA VRAD-Satellite (10/06/09 impact)
				
NASA/USAF Space Ground Link Subsystem (SGLS): (list supplied by xBr)
Uplink		Channel		Downlink 
1763.7210	Channel 01	2202.5 
1767.7250	Channel 02	2207.5 
1771.7290	Channel 03	2212.5 
1775.7320	Channel 04	2217.5 
1779.7360	Channel 05	2222.5 
1783.7400	Channel 06	2227.5 
1787.7440	Channel 07	2232.5 
1791.7480	Channel 08	2237.5 
1795.7520	Channel 09	2242.5 
1799.7560	Channel 10	2247.5 
1803.7600	Channel 11	2252.5 
1807.7640	Channel 12	2257.5 
1811.7680	Channel 13	2262.5 
1815.7710	Channel 14	2267.5 
1819.7750	Channel 15	2272.5 
1823.7790	Channel 16	2277.5 
1827.7830	Channel 17	2282.5 
1831.7870	Channel 18	2287.5 
1835.7910	Channel 19	2292.5 
1839.7950	Channel 20	2297.5
 

(above) SGLS Channel 9 2242.500 survey - June 2006 - click picture to see full resolution version.

(above) SGLS Channel 9 2242.500 survey - 13/06/07 - click picture to see full resolution version.

 

24 hours plot of 2242.500MHz, bottom of the picture is 21:00 13/03/11

 The pictures below show FFT spectrum analysis of various S-Band downlinks - they were made using RF-Space SDR-14 or SDR-IQ software radios.

2238.530 - Low earth orbit - TX is doppler corrected!

2237.483 AMS2 Low earth orbit - a wobbling carrier

 

2232.500 DSP 38W

2217.500 ISS / Space Shuttle

2202.005 Beidou-1M TT&C

2282.500 AIM -switching mode during pass

2278.377 ACE TT&C

2273.000 SAR-LUPE-2

The Spectran screen shot below is of the signal from the Smart-1 satellite that was in orbit around the Moon. The signal was very strong, peaking 20dB over noise in 2.5KHz. The nominal frequency of Smart-1 wass 2235.100MHz. This signal was captured on the 6th May 2006 at 18:46GMT. Further information on Smart-1 can be found here.

(above) Smart-1 2235.1MHz signal received on a 1.8m dish with 3.5 turn S-Band helical feed (as described above)

(above) Smart-1 2235.1MHz signal received on an S-Band omni.

(above) METOP-A 2230MHz TT&C signal received on an S-Band omni a few days after launch.