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Peter Miles
Northam, Western Australia
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UFO-11
(USA-174)
UFO-11 Background and technical
overview.
HOME >
OPERATIONAL
> MODES
& FREQUENCIES > SATELLITES
- RADIO TARGETS >
UFO-11 is the final spacecraft of the U.S. Navy's UHF Follow-On (UFO) programme. It is also designated USA-174, 2003-057A, and NORAD 28117. It was launched on 18 December 2003 by an Atlas IIIB from Cape Canaveral SLC-36B. The launch mass was approximately 3,041 kg.
CelesTrak currently lists UFO-11 at roughly 35,800 km altitude with an inclination of about 9°.
The inclination is significant: UFO-11 is not presently a perfectly geostationary satellite. It moves north and south relative to the equator over the course of a day.
The UFO system has been superseded by MUOS. UFO-11 was intended partly as a transition/gap-filler spacecraft between the UFO constellation and MUOS. Current U.S. Space Force information describes the UFO system as having been fully replaced by MUOS.
Details
| Satellite: |
UFO-11 (USA-174) |
| Norad ID: |
22787 |
| Operator: |
US Navy |
| Status: |
Operational,
however superseded by MUOS. |
| Frequency Range: |
240.0 -
270.0 MHz VHF Down Link
20–45 GHz region EHF (details
unknown).
|
| Mode: |
FM |
| Altitude [km]: |
35,800km
Geosynchronous, near-equatorial at
Longitude 75.39 |
| Tracking: |
https://www.n2yo.com/?s=28117&live=1 |
The published
UFO-11
UHF transponder plan:
|
|
Bandwidth |
Status |
| 243.915
MHz |
30
kHz |
Confirmed |
| 243.935
MHz |
6
kHz |
Confirmed |
| 243.945
MHz |
6
kHz |
Confirmed |
| 243.955
MHz |
6
kHz |
Confirmed |
| 243.965
MHz |
6
kHz |
Confirmed |
| 243.975
MHz |
6
kHz |
Confirmed |
| 243.985
MHz |
6
kHz |
Confirmed |
| 244.225
MHz |
6
kHz |
Confirmed |
| 248.825
MHz |
30
kHz |
Confirmed |
| 248.845
MHz |
6
kHz |
Confirmed |
| 248.855
MHz |
6
kHz |
Confirmed |
| 248.865
MHz |
6
kHz |
Confirmed |
| 248.875
MHz |
6
kHz |
Confirmed |
| 248.885
MHz |
6
kHz |
Confirmed |
| 248.895
MHz |
6
kHz |
Confirmed |
| 248.905
MHz |
6
kHz |
Confirmed |
| 248.915
MHz |
6
kHz |
Confirmed |
| 248.925
MHz |
6
kHz |
Confirmed |
| 248.935
MHz |
6
kHz |
Confirmed |
| 248.945
MHz |
6
kHz |
Confirmed |
| 248.955
MHz |
6
kHz |
Confirmed |
| 248.965
MHz |
6
kHz |
Confirmed |
| 253.550
MHz |
30
kHz |
Russian
origin broadcast (Radio Sputnik) 18 Sept 2026 |
Reception Reports
|
| Screenshot 1
Russian radio pirates on US Navy satellite. Two-way NFM activity
on a 30kHz BW channel. |
| Date |
Time |
Frequency |
Details |
| 29 Sept, 2026 |
07:10Z |
260.625
MHz |
Russian
origin broadcast (Music) 12kHz Bandwidth, approximately 20dB above
the noise floor. Likely UFO-11,
however not on known band plan.
See below screen shot.
|
|
Antenna: |
5 Element Yagi for 250MHz.
https://vk6ysf.com/yagi_250mhz_5el_20220925.html |
| Software: |
SDR Software: SDR++Brown |
|
 |
| Screenshot 2
Russian radio pirates on US Navy satellite. Broadcasting music, and quite pleasant. |
References
TOP
OF PAGE
Page initiated 8 September, 2026
Page
last revised 29 September, 2026
|
|
|
Space Weather
https://www.swpc.noaa.gov/
|
James
Chadwick born 20 Oct 1891
Was
a British physicist who discovered the neutron in 1932,
revolutionising our understanding of the atomic nucleus and paving
the way for major advances in nuclear physics. He won the 1935
Nobel Prize in Physics.
|
Notice Board
|
VK6YSF JS8Call and
Olivia 8/250 operations.
Current activity is generally
focused - though not restricted to - JS8Call operations on the 20,
40m and 80m bands.
Olivia 8/250 is used occasionally on the 20m band.
Proposed
band and mode activity
is often communicated on HamSpots: https://hamspots.net/js8/
or my profile on
X: https://x.com/vk6ysf97230
.
Post
date: 14 October 2026
|
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Local
Repeaters
Repeaters Page Updated
- Expanded and refreshed information on VHF and UHF repeaters across Western Australia's Central Coast, Perth, the Avon Valley, and the Peel region. New AllStar Link information has also been added, including linked repeater details and
gateway information across the State.
Repeaters
details:
https://vk6ysf.com/local_repeaters.htm
AllStar Link notes:
https://vk6ysf.com/allstar_notes-20260703.htm
Post
date: 14 October 2026
|
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Western Australian SSTV net
Popular
Western Australian SSTV net for both digital and anolog SSTV.
Generally
found at 7214.0kHz LSB every afternoon from 08:00 UTC (4:00pm WST)
For more
details: https://www.wasstv.net/wasstv.net/index.html
Post
date: 8 December 2025
|
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VK6MJM LF (136kHz) and MF (474kHz) Beacon
VK6MJM is a LF/MF station
located in Manjimup, Western Australia.
Common Mode: FST4W 300 (Similar to
WSPR)
Note:
other modes and sub-modes may be used.
Station details were presented by
Peter Hall (VK6HP) at PerthTech 2024.Presentation PDF: Peter
Hall VK6HP at PerthTech
QRZ Page: VK6MJM
on QRZ.com
Post
date: 10 March 2025
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