The signal from Ten-Koh2 is weaker than expected.
At our ground station, we are monitoring telemetry(voltage, temperature etc.) via the CW beacon. Reception reports via SatNOGS are very helpful. We would appreciate your continued support in receiving signals.
Currently, only the CW signal on 435.860 MHz is active. It is transmitted every 90 or 180 seconds depending on the satellite status.
Thank you very much for your cooperation!!
SSDV sends down the last picture taken. They have now crossed below the minimum altitude on our imaging license, so they are not taking any more new pictures!
They’re talking with the team on how they could back the SSDV transmissions up to one of the earlier pics.
..and the “Grand Dame” of digital communication experiments is celebrating its 40th anniversary these days.
On March 1, 1984, the second satellite designed and built by the University of Surrey’s Spacecraft Engineering Research Group—USAT in the UK, UoSAT-2 (UO- 11) was launched on a Delta rocket from the Western Test Range at Vandenberg Air Force Base
Among its many experiments, UoSAT-2 carried the Digital Communications Experiment, which was the first use of amateur radio store&forward techniques with Low Earth Orbiting Satellites
In 2008 it was determined that there was no viable battery backup functioning, only the solar panels were available to provide power. With the watchdog timer and eclipse schedule during orbits, the satellite has a 20 day cycle of 10 days on and 10 days off.
The older satellite radio amateurs will surely fondly remember the many wonderful hours we spent with UO-11. That makes it all the more wonderful to still receive the familiar signals today:
1400 UTC
000000010001020002030003040004050005060006070007080008090009 100001110000120003130002140005150004160007170006180009190008 20000221000322000023000124000625000726000427000528000A29000B 30000331000232000133000034000735000636000537000438000B39000A 40000441000542000643000744000045000146000247000348000C49000D 50000551000452000753000654000155000056000357000258000D59000C 60800E615FC1620105633341644402651E0C66200267000168000E69000F UOSAT-2 2408213120624 000000010001020002030003040004050005060006070007080008090009 100001110000120003130002140005150004160007170006180009190008 20000221000322000023000124000625000726000427000528000A29000B 30000331000232000133000034000735000636000537000438000B39000A 40000441000542000643000744000045000146000247000348000C49000D 50000551000452000753000654000155000056000357000258000D59000C 60800E615FC1620105633341644402651E0C66200267000168000E69000F UOSAT-2 2408213120629 000000010001020002030003040004050005060006070007080008090009 100001110000120003130002140005150004160007170006180009190008 20000221000322000023000124000625000726000427000528000A29000B 30000331000232000133000034000735000636000537000438000B39000A 40000441000542000643000744000045000146000247000348000C49000D 50000551000452000753000654000155000056000357000258000D59000C 60800E615FC1620105633341644402651E0C66200267000168000E69000F UOSAT-2 2408213120634 000000010001020002030003040004050005060006070007080008090009 100001110000120003130002140005150004160007170006180009190008 20000221000322000023000124000625000726000427000528000A29000B 30000331000232000133000034000735000636000537000438000B39000A 40000441000542000643000744000045000146000247000348000C49000D 50000551000452000753000654000155000056000357000258000D59000C 60800E615FC1620105633341644402651E0C66200267000168000E69000F UOSAT-2 2408213120639
21:07 – 2126 UTC pass
hihi20cc80f500080000000001016a67e7a1f1828683858684 hihi20cc80f500080000000001016c67e7a1f1688683858584 hihi20cc80f500080000000001016667e7a1f1808683858584 hihi20cc80f500080000000001015f67e7a1f17d8683848584 hihi20cc80f500080000000001015f67e7a1f16a8783848584 hihi20cc80f500080000000001016167e7a1f1818783848584 hihi20cc80f500080000000001016167e7a1f1648783848584 hihi20cc80f500080000000001015d67e7a0f16c8783848584 hihi20cc80f500080000000001015567e7a1f1898783848584 hihi20cc80f500080000000001015067e7a1f0f38783848584 hihi20cc80f500080000000001014c67e7a0f05a8783848584 hihi20cc80f500080000000001014467e6a0f0608784848584 hihi20cc80f500080000000001014467e7a0f15c8784838584 hihi20cc80f500080000000001014767e7a0f1808784838584 hihi20cc80f500080000000001014867e7a1f08d8884838684
Mike san,
Thank you for providing the S/W regarding the shading and sunlight of FO-29. I was able to predict it accurately. Also, thank you for the CW telemetry information.
I will inquire with JARL whether it is possible to issue a QSL, but it is probably discontinued. This year, there is full sunlight for about half a year. The old lady will celebrate her 30th birthday this August.
Thank you very much, Mike san.
73’s JA1OGZ Akira.
2219 UTC hihi 20 cc 80 f5 00 08 00 00 00 00 01 01 4f 67 e7 a1 f0 79 87 83 87 89 87 hihi 20 cc 80 f5 00 08 00 00 00 00 00 01 4c 67 e7 a1 f1 79 87 83 87 89 8b hihi 20 cc 80 f5 00 08 00 00 00 00 01 01 4d b7 e7 a1 f0 78 87 84 88 89 87 hihi 20 cc 80 f5 00 08 00 00 0633 UTC hihi 20 cc 80 f5 00 08 00 00 00 00 01 01 7a 67 e7 a1 f1 85 8a 81 82 89 85 hihi 20 cc 80 f5 00 08 00 00 00 00 01 01 .a 67 e7 a1 f1 82 hihi 20 cc 80 f5 00 08 00 00 00 00 00 01 7a 67 e7 a1 f1 .c 80 82 79 hihi 20 cc 80 f5 00 08 00 00 00 00 01 02 7a 67 e7 a1 f1 70 89 81 82 88 75 hihi 20 cc 80 f5 00 08 00 00 00 00 01 01 6e b7 e7 a1
“We are pleased to announce that “Tenkoh-2” has been released from the H-SSOD of the first HTV-X.
Release date and time: March 11, 2026, around 18:35 (JST) – 09:35 UTC
The satellite will enter an initial operation phase for a certain period of time, during which time we will confirm that each satellite subsystem, including the power supply and communications systems, is operating normally. After that, we plan to begin operating the various mission equipment on board and carry out the planned demonstration experiments one by one.
We plan to transmit CW beacons and other signals from this satellite. Your reception reports will be extremely important information for understanding the status and operation of the satellite. If you are successful in receiving signals, we would appreciate your cooperation in sharing them using the reception report form at the URL below.
English: To Amateur Radio Operators
A post from okuyama.keiichi on 奥山研究室 provided by: https://aero.cst.nihon-u.ac.jp/okuyama
Linear Transponder Uplink 145.895 MHz through 145.935 MHz
Linear TransponderDownlink 435.875 MHz through 435.915 MHz
CW, Digitalker, and AFSK 1.2kbps, GMSK 9.6kbps: 435.860 MHz
GMSK 4.8kbps, GMSK 9.6kbps, GMSK 19.2kbps, and 4FSK 38.4kbps: 435.895MHz
CW beacon: 5.839 GHz
1 66174U 25241A 26070.19118651 .00009215 00000-0 17770-3 0 9997 2 66174 51.6325 64.9326 0007932 179.9008 180.1983 15.48575655554479
A Japanese amateur radio satellite, launched to the International Space Station (ISS) last October, will soon be deployed in a higher orbit.
After delivering about 12,000 pounds of supplies, scientific investigations, hardware, and other cargo to the ISS for NASA and its international partners, JAXA’s (Japan Aerospace Exploration Agency’s) uncrewed HTV-X1 cargo spacecraft departed the ISS on Friday, March 6. The spacecraft arrived at the space station on Oct. 29, 2025, after launching Oct. 25 on an H3 rocket from Japan’s Tanegashima Space Center.
The HTV-X1 spacecraft will boost itself to a 500km circular orbit where it will remain for more than three months acting as a scientific platform for JAXA’s experiments.
After attaining this higher orbit, HTV-X1 will deploy Ten-Koh 2, a 6U cubesat constructed by Nihon University carrying a variety of amateur radio experiments. These will include:
Following the deorbit command, HTV-X1 will dispose of several thousand pounds of trash from the ISS during re-entry into Earth’s atmosphere, where it will burn up harmlessly. However, Ten-Koh 2 is expected to remain in orbit and active for approximately one year to 18 months.
07 Mar 2026 20:24 UTC, 20:20 UTC and 20:29 UTC
07 Mar 2026 21:57 UTC, 22:00 UTC and 22:03 UTC
06 March 2026 – 22:09:40 UTC low pass <30 deg
28 Feb 2026 16:06 UTC
