The signal from the digital amateur television (DATV) transmitter aboard the International Space Station (ISS) cannot be detected on the ground, Amateur Radio on the International Space Station (ARISS) has reported. The unit indicates that it is functioning, however. So far, ARISS has been at a loss to pin down the problem.
“A series of steps are currently being undertaken to try to diagnose the problem,” a May 10 announcement from ARISS said. “However, if an actual failure occurred, only a ground-based evaluation will fully diagnose the problem. The ARISS International team is working diligently to bring [the system] back to full operation as soon as practical.” The ISS DATV system is known variously as “HamVideo” and “HamTV.”
ARISS said it has begun coordination with its space agency partners and sponsors to “expeditiously troubleshoot the issue onboard and, if necessary, troubleshoot and repair the device on the ground.”
The DATV transmitter has proved to be a valuable educational asset that ISS crew members have enjoyed employing over the past couple of years during ARISS school and group contacts. Astronauts Tim Peake, KG5BVI; Paolo Nespoli, IZ0JPA; and Thomas Pesquet, KG5FYG, in particular, made routine use of the DATV system to enhance the ARISS ham radio contact experience for students and educators.
Ground stations in Australia and Europe have functioned to receive and distribute the Amateur Radio TV signal from the ISS. Ground stations are under development in the US. Several hams in Japan have set up ground stations that have received the DATV signal from the ISS.
Peake inaugurated formal use of the DATV system for a 2016 ARISS school contact with students at a Royal Masonic School, in Rickmansworth, England, home of GB1RSM. The DATV system, located in the Columbus module of the ISS, allowed students at the school to see as well as listen, as Peake, operating as GB1SS, answered their questions about life in space. The one-way DATV downlink took place near 2.4 GHz, while the two-way FM audio component was maintained on 2 meters.
The DATV system was first proposed more than 17 years ago. The IK1SLD ground station received the DATV signal. It was commissioned during a series of tests in 2014.
The third public test of FT8 DXpedition Mode on May 5 is being called a success. The goal of the exercise was to simulate a rare DXpedition pileup on FT8 by having many stations (“Hounds”) calling and trying to work a designated pseudo DXpe… Read more
The updates to QRZ’s Android App, formerly known as QRZDroid have been released and are available to those who are interested in trying it out. The app has a new name, now known as QRZ Assistant. There are a bunch of new features and… Read more
Introducing the Icom IC-7850 50th Anniversary Edition Read more
“I’m currently testing a new software for the DV4home. The modifications included, the DMR+ complete masters list, the Brandmeister reflec… Read more
“This is where you start. Video #1. I have done a quick video on each one of the HF bands to educate the newcomer to the hobby or for anyone who… Read more
Xiegu X510 X5105 is a highly portable transceiver working at HF+6m band, with a built-in power output of 5W. Technical features: double-conver… Read more
3D Print – 3 element 2m (145 MHz) Ultra Portable yagi by OK1CDJ Description Tape measurement yagi. Weight only 170 g. The longest part is 530 mm… Read more
New product on offer – HEXBEAM SP7IDX TECHNOLOGY recommends SPID ELEKTRONIK – NEW 2017 rotators + controller Rot1prog USB are smal, medium ideal… Read more
HF Mobile Autotune Whip Antenna 1.6-30 MHz 200W Stealth 9360 Automatic Tuning Mobile HF Antenna automatically tunes in 0.35 sec to any frequency throu… Read more
Powered by WPeMatico