Welcome to satelliteobservation.net! On this site, you will find in-depth content about the Earth Observation industry and the changes it is going through. For day-to-day news, I also have a twitter account here that you can follow.
The articles on national reconnaissance systems are:
History of the French reconnaissance system
The Chinese maritime surveillance system
The Yaogan-30 high-revisit constellation
History of the US reconnaissance system
History of the US high-altitude SIGINT system
The articles on US Signal Intelligence satellites are:
Signal intelligence 101: SIGINT targets
History of the US high-altitude SIGINT system
A radiotelescope in the sky: the USA-202 ORION satellite
The articles touching on warfare in space are:
Contested space II: Countermeasures
Prospective articles on the future of earth observation are:
The Future of Optical Earth Observation
What do users really want, anyway?
Other articles are:
Hearing of the French Joint Commander for Space
The Airbus Very High Resolution constellation
Good reading!