There are 14 images added between 2 December 2006 and 17 October 2018
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Initial Operational Capability (IOC): 28 July 2015
Total Production: 6
Unitary Cost: USD$2.3 billion
Also Known As: Advanced Extremely High Frequency and Milstar III
Origin: United States of America
Corporations: Lockheed Martin* and Northrop Grumman   (*) lead contractor
Parent System: AEHF
Initial Operational Capability (IOC): 28 July 2015
Total Production: 6
Total Cost: USD$14 billion
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Description: The Advanced Extremely High Frequency (AEHF), originally known as the Milstar III, will provide anti-jam communications for command and control, intelligence dissemination, and precision attack. It will replace current Milstar orbital communications network. AEHF system will be fully compatible with legacy Milstar terminals in support of strategic and tactical warfighters. AEHF satellites will provide over ten times current Milstar's capacity and six times higher data rate transfer than that of Milstar II satellites. According to US military assessment, Milstar network was a critical asset for US success in recent campaigns over Afghanistan and Iraq. AEHF will ensure US dominance during the first quarter of the 21st century.

The AEHF's phased array antenna is being developed by Northrop-Grumman. The phased array antenna will direct radio frequency beams electronically rather than moving reflectors mechanically. The steered agile beams will allow AEHF satellites to connect more areas simultaneously with highly protected channels and faster than Milstar. The uplink phased array antenna will connect the AEHF spacecraft with ground terminals, while minimizing jamming effects and the possibility of signal intercept by enemies. The US Air Force plans to procure up to 5 AEHF satellites with the first satellite launch scheduled for 2007. AEHF will become the backbone of US military satellite communications network.

In November 2002 two of the planned Advanced EHF satellites were cancelled and the third satellite was delayed one year. FAB-T is the Command Post Terminal for the AEHF Satellite System and thus serves as a key component of the AEHF operations. On September 20, 2004, Northrop-Grumman began testing of the nulling antenna for the AEHF program at the company's facilities in Redondo Beach, California. Nulling antennas are designed to defeat enemy jammers, thereby preventing service interruption to military users. The Northrop-Grumman uplink phased array antenna began testing in late September 2004. The US Air Force awarded Lockheed Martin a $491 million contract to build the third AEHF spacecraft on January 31, 2005. The first sallite was placed into orbit in September 2010 and the constellation achieved intial operational on July 28, 2015.

AEHF Specifications

Service Life: 14 year (5,110 day)
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)


There are 29 news between
28 Sep 2004 and 31 Jul 2015
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Friday, July 31, 2015Advanced Extremely High Frequency Constellation Achieves Initial Operational Capability
Friday, December 27, 2013US Air Force Selects Raytheon's AEHF Satellite Terminal
Monday, November 25, 2013Boeing Tests Validate Performance of FAB-T Satellite Communications Program
Thursday, September 12, 2013Netherlands Becomes Second AEHF Satellite Constellation Partner
Monday, July 8, 2013B-2 New AESA Communications Concept Demonstrated with AEHF Satellite
Thursday, November 29, 2012US Air Force Selects Raytheon to Develop Future Protected SATCOM System
Tuesday, June 19, 2012Boeing FAB-T Demonstrates Communications with On-orbit AEHF Satellite
Wednesday, February 29, 2012On-Orbit Testing of First AEHF Spave Vehicle Completed Successfully
Monday, February 27, 2012US Air Force AEHF Satellite Terminal Achieves Two Critical Milestones
Tuesday, December 20, 2011US Navy Multiband Terminal Successfully Tested with On-Orbit AEHF Satellite

Operators & Related Equipment

Second country partner after Canada and joined in July 2013
United States of America6
Nov 20184
Apr 20143

Grand Total 63

AEHF Spacecraft Listing

SerialCountry - Launch Rocket - SiteStatusLaunch DateOperationalRetired
SV-1 Atlas V - Cape Canaveral Air Force Station14 Aug 2010Sep 2010-
SV-2 Atlas V - Cape Canaveral Air Force Station4 May 201214 Nov 2012-
SV-3 Atlas V - Cape Canaveral Air Force Station18 Sep 2013Apr 2014-
SV-4 Atlas V - Cape Canaveral Air Force Station17 Oct 201829 Apr 2019-
SV-5 Atlas V - Cape Canaveral Air Force Station8 Aug 2019--
SV-6 Atlas V - Cape Canaveral Air Force Station26 Mar 2020--

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