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See the Sirius FM-4 Satellite at The Smithsonian National Air & Space Museum

October 25, 2012 by Leave a Comment
The SiriusXM Satellite at The Smithsonian National Air and Space Museum

The SiriusXM FM-4 Satellite at The Smithsonian National Air and Space Museum in Washington DC, USA. Photo by Dane Penland

One of the first satellites designed to provide space-based digital radio service to consumers in the United States and Canada was donated by SiriusXM Radio and Space Systems/Loral to the Smithsonian. The Sirius FM-4 broadcasting satellite was built as a flight-ready back-up for a constellation of three satellites developed by SiriusXM and manufactured by Space Systems/Loral. The FM-4 satellite will be on display in the James S. McDonnell Space Hangar of the National Air and Space Museum’s Steven F. Udvar-Hazy Center.

“The availability of a flight unit like Sirius FM-4, which was never launched, is extremely rare and will be a significant addition to the museum’s collection,” said Martin Collins, space history curator. [Read more…]

Filed Under: Communication Satellites, Organisations

What is 4G? Do you know?

September 23, 2012 by Leave a Comment

It’s not often that I stray into the broader world of telecommunications, but I was so impressed with this article by Mark Gregory in “The Conversation” that I wanted to share it in its entirety.
For those of you who want a peek behind the ‘4G’ acronym without being sucked into a morass of technical detail, then this is the article to read.

Explainer: what is 4G?

By Mark Gregory, RMIT University

If you’re looking to buy a new smartphone or computer you’ve probably seen advertisements and offers for 4G-compatible devices. You might even own a 4G-compatible device already.

But just what is 4G? How does it compare to existing 3G networks? And what is the current availability of 4G networks in Australia?

[Read more…]

Filed Under: Telecommunications

Loss of the OTS 1 Satellite

September 13, 2012 by 10 Comments
OTS In Orbit - Artist's Impression

The OTS Satellite In Orbit – Artist’s Impression

This is a sorry tale of how four years’ work was destroyed in 54 seconds. Some say that the number thirteen is unlucky and on 13th September 1977, exactly 35 years ago today, this proved to be the case for me and the whole team that developed the OTS satellite. Here’s how things played out.

The European Space Agency’s Orbital Test Satellite (OTS) was one of the very first geostationary, 3-axis-stabilised Ku-Band communications satellites. It was developed as a test bed for a host of new European technologies and transmission techniques aimed at bringing regional TV and trunk telephony services to Europe. It was the forerunner of the highly successful ECS satellites which were subsequently operated and managed by EUTELSAT.

I spent four years working on different aspects of the OTS satellite, the communications transmission design and on the ground segment earth stations. For any interested readers with a technical bent you can check out details on the EXPERIENCE and PUBLICATIONS pages of this site.

In March 1977 I took on the role of designing, planning and implementing the in-orbit testing (IOT) of OTS. This was to be carried out from Telespazio’s Fucino earth station complex in the mountains east of Rome, Italy, and you can check out the Fucino earth station complex with the interactive Google Map on my related blog post [Read more…]

Filed Under: Communication Satellites, Earth Station Locations, Launch Vehicles, Launches, Organisations

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