China completes the Yaogan-30 constellation

This article initially appeared on eastpendulum.com, a French-language blog about the Chinese military and aerospace industry The Chinese Yaogan-30 constellation has already been the topic of two previous articles, but this one is probably the last: with the launch of the seventh trio of satellites, the constellation has now six equally-spaced planes, so it has… Continue reading China completes the Yaogan-30 constellation

GEOINT at DRM, the French military intelligence agency

The center for artificial intelligence at the Paris Sorbonne university is organizing a weekly seminar on the state of GEOINT in France, with a lot of distinguished speakers from the French ministry of the armed forces and from the industry. To open the series, they had none other than general (Air) Jean-François Ferlet, the head of the military intelligence agency DRM (Direction du Renseignement Militaire)

The American proliferated LEO architecture

The USA have for a long time been trying to track missiles after the main engine has burned out. The recent rise of manoeuvrable hypersonic gliders and cruise missiles has made this need more pressing, since they fly very low compared to ballistic missiles, and consequently they are mostly below the radar horizon. China and… Continue reading The American proliferated LEO architecture

TJS-4 antenna design documents uncovered

I recently wrote about the TJS-4 satellite, which the Chinese put into geostationary orbit. Based on the picture released during launch, I concluded it was a signal intelligence satellite, capable of collecting signals of "250MHz to 1.5GHz of frequency. It is even possible that smaller elements, not visible on the image, allow the satellite to… Continue reading TJS-4 antenna design documents uncovered

TJS-4, the ears of Beijing

This article initially appeared on eastpendulum.com, a French-language blog about the Chinese military and aerospace industry On October 17th, 2019, China launched the TJS-4 satellite from the Xichang Space Center. It was carried towards geostationary orbit by a Long March 3B rocket. However, contrary to the civilian communication satellites which are often launched to this… Continue reading TJS-4, the ears of Beijing

Some news on the Yaogan-30 constellation

This article initially appeared on eastpendulum.com, a French-language blog about the Chinese military and aerospace industry A few years ago, I wrote about the Yaogan-30 constellation, which is made out of Chinese military satellites in Low Earth Orbit. By then, it had two groups of three satellites each, with the second group still having to… Continue reading Some news on the Yaogan-30 constellation