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.
WSJT-X version 2.5.1 releasedThe development team have announced the General Availability (GA) release of WSJT-X version 2.5.1. This release mainly contains improvements and defect repairs related to Q65 and JT65 modes when used with non-st... Read more
In view of the escalating demand for higher mobile data (from IoT, industry 4.0 applications), there is a growing world-wide interest to improve the radio spectrum utilization. Effective management of the wireless spectrum requires knowledg... Read more
In this video, I will show you how I interfaced my 7100 with the Mobilinkd bluetooth TNC wireless to my PC to send emails on 144Mhz Read more
“After 5 months of using this antenna, I owe a follow up as I mentioned in my original video. This antenna has been a solid daily user since I i... Read more
“Hello Operators Todays video is a Ham Radio Raspberry Pi tutorial for the Icom IC-705 and eventually other radios. We will be using a new setup... Read more
In this video I show the ground radial wire I use, and talk about laying a radial field under my Hustler 4BTV vertical ham radio antenna ... Read more