Name |
Catalog Number |
COSPAR ID |
Frequency MHz |
Modulation
|
Audio (kB) |
Notes |
TRANSIT |
965 |
1964-83D |
136.653 |
FM/PM |
118 |
Note 1. |
SOLRAD 7B |
1291 |
1965-16D |
136.80 |
FM/AM |
157 |
Note 2. |
TIROS-10 |
1430 |
1965-51A |
136.232 |
PM |
approx
1280 Hz. Very Intermittent operation. |
|
ALOUETTE-2 |
1804 |
1965-98A |
136.98 |
Carrier only |
Note 18 |
|
ERS 15 | 2411 |
1966-77B |
136.44 |
Carrier only |
466 |
Note 4 |
EGRS-7 |
2412 |
1966-77C |
136.80 |
Carrier only |
Note 4a |
|
ERS 20 |
2768 |
1967-40D |
136.26 |
PM |
156 |
910 Hz, 4 sec period Note 5. |
ISIS 1 |
3669 |
1969-9A |
136.41 |
Carrier only |
||
EGRS-13 |
3891 |
1969-37B |
136.800 |
Carrier only |
74 | Note 3 |
S69-4 |
4237 |
1969-82E |
137.41 |
Carrier only |
Note 8. |
|
TIMATION-II |
4256 |
1969-82B |
137.383 |
FM/AM |
79 |
Note 6. |
SHINSEI |
5485 |
1971-80A |
136.695 |
Carrier only |
Daylight only |
|
NOSS |
5680 |
1971-110C |
137.08 |
Carrier only |
Note 9. | |
NOAA-9 |
15427 |
1984-123A |
136.77 |
Carrier only |
Note 16. | |
ECS-4 |
18351 |
1987-78B |
137.139 |
PCM/FSK/PM |
78 |
Note 15 |
ECS-5 |
19331 |
1988-63B |
137.142 |
PCM/FSK/PM |
Note 15 | |
NOAA 15 |
25338 |
1998-30A |
137.35 137.62 |
PCM/PM AM/FM |
DSB Note 10 APT Note 11 |
|
HAMSAT
|
28650 | 2005-17B | 137.20 |
PCM/PSK/PM | 84 | Note 19. Modulated carrier |
NOAA-18 |
28654 |
2005-18A |
137.35 137.9125 |
PCM/PM AM/FM |
DSB APT |
|
NOAA-19 |
33591 |
2009-05A |
137.77 137.10 |
PCM/PM AM/FM |
DSB APT |
|
Meteor-M
N2 |
40069 |
2014-37A |
137.100 |
QPSK |
LRPT
72 kbps Note 17. |
|
ORBCOMM |
various |
various |
137.2000 137.2250 137.2500 137.2875 137.3150 137.4400 137.4600 137.6625 137.6875 137.7125 137.7375 137.8000 & 137.5600 |
SDPSK OQPSK |
4800 bps PCM
Subscriber Communicator
downlink. Note 12. 57.6 kbps, 16 slot TDMA, Spacecraft to GES downlink. Note 12a. |
|
VLD2 |
- |
- |
136.975 |
D8PSK |
Non satellite emitter in area.
ICAO VHF Data Link Mode
2 |
1 |
Launched on 13 Dec 1964 as the
second operational TRANSIT spacecraft, it should be more
correctly called OSCAR -2, O-2 or NSS 30020. Unfortunately, the
navigation system failed within 2 weeks of launch. The telemetry
beacon can be CW
or
modulated depending on solar lighting conditions. The PAM data is 35
steps
with a repeat cycle of about 12.5 seconds. Each step has a duty cycle
of about 75% data value and 25% return to centre frequency value. These
steps vary a 5400 Hz centre frequency sub carrier oscillator, IRIG 10,
that then frequency modulates the RF carrier. Another SCO at 10.5 kHz,
IRIG 12, is
sometimes present. It has a pattern of five pulses with gaps, followed
by a longer gap at about a 1.5 Hz rate. A SSB receiver will resolve,
separately, the carrier as a single tone and each of the sidebands as
"musical" tones. Also see Maik Hermenau's TRANSIT 5B5 page |
2 |
The telemetry is a multiplex of
six IRIG-106 7.5%
bandwidth sub carrier oscillators, linearly added and
amplitude modulate the RF carrier. IRIG 3 (730 Hz centre frequency) and
IRIG 4 (960 Hz cf) vary in step over 3.6 second with 8 periods of 450
millisecond each. IRIG 5 (1300 Hz cf), IRIG 6 (1700 Hz cf) and IRIG 7
(2300 Hz cf) are all fixed at their lower deviation limit of 1202 Hz,
1572 Hz and 2127 Hz respectively. IRIG 8 (3000 Hz) drifts from the the
lower limit, 2775 Hz, to the upper limit, 3225 Hz, over time. |
3 |
Previously had IRIG 3 SCO, 730
Hz
c.f., 16 segment, 0.67s per segment, PAM/FM/PM telemetry or just 680 Hz
or CW EGRS (Electronic & Geodetic Ranging Satellite or Experimental Geodetic Research Satellite) with a SECOR (Sequential Collation of Range) transponder. |
4 |
Called SECOR 7 by Space-Track.
The
telemetry is random levels of about 8 seconds duration each, on a 1300
Hz centre frequency SCO that amplitude modulates the RF carrier. The RF
exhibits short term frequency instability. |
4a |
Called ERS-15 by Space-Track. |
5 |
ERS-20
aka OV5-3,
sounds like a "moan". OV5 series. Unstable carrier (± 100 Hz), amplitude modulated with 910 Hz tone with approx. 4.6 second period. It can be heard about an hour earlier every 2 days for up to 12 hours over a 3 to 4 week period with a repeat cycle of about 7 weeks. An updated TLE was derived by Greg Roberts and Mike McCants in September 2007 |
6 |
Called OPS 7613 P/L 1 by
Space-Track.
Telemetry is PAM/FM/AM. 4 SCOs (Ch 4 960 Hz,Ch 6 1700 Hz, Ch 7 2300 Hz
and
Ch 8
3000 Hz centre frequencies). PAM is 30 levels plus a min and max
calibration/sync pulses over 4 secs. Ch 4 floating, Ch 6 & 7 are
repeating
patterns, Ch 8 is a 4 Hz clock. |
8 |
POPPY program declassified 12
Sept 2005 by NRO.
Preliminarily called POPPY-6B,
also known as OPS 7613 P/L 4 or NRL
PL162. Historically but incorrectly called S69-4 |
9 |
POPPY program declassified 12 sept 2005 by NRO. Preliminarily called POPPY-7B. also known as OPS 7898 P/L 2, previously thought to be US Navy Ocean Surveillance System (NOSS), Sub-Satellite Unit C (SSU-C). TLEs from Mike McCants' classified section. |
10 |
DSB -
Direct Sounder Broadcast - 8320 bps TIROS Information Processor (TIP)
data, Bi-phase-level encoded (Manchester), ±67°
PM
modulation, 1W, RHCP. 104, 8-bit words/minor frame. 20 bit sync code (EDE20 hex) + 4 bit S/C ID. |
11 |
APT -
Automatic Picture Transmission - 120 line/min Visible and Infrared
video (1600 Hz BW) amplitude
modulates a 2400 Hz carrier that then frequency modulates the 5W RF
carrier, deviation is ±17 kHz. RHCP, ½ turn, ½
wavelength resonant quadrifilar antenna (boom deployed VRA on TIROS-N
series spacecraft) |
12 |
ORBCOMM spacecraft are frequency
agile and may, can and do vary their downlink
frequency on a orbit by orbit basis. (TLE) 59 spacecraft have been launched. These are Flight Model 1 to 28, 30 to 36 (now called OG1 models) of which FM 1, 2, 3, 17, 22, 24, 25 26, 28 & 33 are not transmitting or have failed. FM 29 was Concept Demonstration Satellite 3 and FM 37 to FM 41 were Quick Launch 1 to 5. All have failed. FM 101 OG2 model, launched 8 Oct 2012, decayed 10 Oct 2012 FM 103, 104, 106, 107, 109 & 111 OG2 model launched 14 July 2014 (Orbtial Plane K) FM 105, FM 108, FM 110, FM 112, FM 113, FM 114, FM 115, FM 116, FM 117, FM 118 & FM 119 OG2 model launched 22 December 2015 |
12a |
A Gateway Earth Station (NCC ID
120 (78 hex)) opened
early 2007 at Rutherglen, Australia, about 250 km North of my location.
Multiple 125 msec bursts, 1 sec apart, on 137.56 MHz Photo GoogleEarth Placemark |
15 |
ECS-4
(EUTELSAT
1F4) re-orbited
above geostationary orbit December 2002 and drifting westward at
approximately 5° per day. The signal is 2-10 minute carrier on usually with data subcarrier and 20-40 minutes carrier off. ECS-5 (EUTELSAT 1F5) re-orbited above geostationary orbit May 2000 and drifting westward at approximately 7.5° per day, The signal is 50-70 minute carrier on usually with data subcarrier and 60-100 minutes carrier off. Found during a recent mutal visibility period with ECS-4. Telemetry is 160 bps NRZ TDM PCM data, Bi-Phase-Level coded, BPSK on 2560 Hz subcarrier, PM on 137.14 MHz at 8 Watts. |
16 |
137.505 MHz not heard since
December 2014. NOAA-9-2011-5-16-0718.JPG |
17 |
Meteor-M1 21 March 2016 LRPT off Meteor-M2 Rate ½, k = 7 Convolution coded, I = G1, Q = G2, Power I:Q = 1:1, Symbol Rate 72 or 80 kilosymbols per second CCSDS Format. SCID 00, VCID 05 with 3 out of APIDs 64 to 69, (MSU-MR channels 1 to 6) or VCID 63, Fill Can use either 72 kbps mode or 80 kbps Metop LRPT mode with Unique Word (UW) Insertion . Can use either 137.10 or 137.90 MHz More info on Oleg's LRPT site 21 Mar 2016 LRPT on 137.90 MHz in 72 kbps mode, APID 64, 65, 68 & 70 (Vis, Vis, IR) |
18 |
Alouette-2 on 136.59 MHz re-discovered
by Raydel of Cuba in early August 2013. Subsequently found to be transmitting on 136.08 and 136.98 MHz as well. 136.08 MHz was a Wideband FM system for Sounder data with two sub-carriers, 22 and 30 kHz, FM/FM, 4W, 100 kHz bandwidth, 136.59 MHz was a Narrowband PM system for Experiment Data on 4 sub-carriers,3.9, 5.4. 14.5 & 22 kHz, PAM/FM/PM, 2 W, 50 kHz bandwidth and 136.98 MHz was a 100 mW CW tracking beacon Currently, only 136.98 MHz CW is on |
19 |
Hamsat not heard since
December 2014, heard again from 19 September 2017 onwards. 256 bps on ± 25.6 kHz subcarrier sidebands & ±51.2 kHz unmodulated sidebands |
Spacecraft no longer
heard but
still monitored occasionally |
Frequency |
Last Heard |
PROSPERO
(1971 Paper, 1973 Paper
,1975 Paper) |
137.560 |
November
2003 |
MEGSAT-1
2000-57B/26546 1200 bps PCM/PM telemetry
Audio file 305 |
137.905 |
December
2011 |
TIROS-N 11060 1978-98A | 137.77 | Not heard since mid Dec 2015 |