Program: Advanced EHF
Also called AEHF
US military program of telecommunication satellites to replace
Milstar.
The system will consist of 4 satellites (with in-orbit links) covering from
65° north to 65° south. Transmission rates should be 10 times those of
Milstar
2. Approx 500 Mbps throughput per satellite, the segments will provide
communications in a specified set of data rates from 75 bps to approximately 8
Mbps.
The satellites are to be built by a team made of Lockheed Martin (prime
contractor) and TRW (payload integrator). In Nov 2001 the team won a contract
worth $3.2 billion to begin the development and demonstration phase. Should
cost approx $6.1 billion.
Initial plans: first satellite launch planned in 2006, last satellite to be in
orbit in Dec 2011. Real life: first satellite launched in mid-2010.
In Jul 2002 a report recommends to cancel the last 2 satellites and to replaced
them by a laser communication system.
In Jan 2006, the 3rd satellite was ordered from Lockheed Martin for $491.2
million.
In Dec 2010, a 4th satellite was ordered from Lockheed Martin.
In Dec 2012, 2 more satellites were ordered from Lockheed Martin (worth $1.9
billion), but not be worked on before fiscal year 2019.
In 2020 Northrop Grumman has been awarded a contract by the US Space Force for
the rapid prototyping phase of the
Evolved Strategic SATCOM (ESS) program
to develop a modernised space segment.
http://www.lockheedmartin.com/aehf/