JSTARS

E-8 Joint STARS
A U.S. Air Force E-8C Joint STARS, in flight.
Role	Airborne battle management
Manufacturer	Northrop Grumman Grumman Aerospace Corporation
Introduction	1991
Primary user	United States Air Force
Number built	17
Unit cost	US$244.4 million in 1998
Developed from	Boeing 707

The Northrop Grumman E-8 Joint Surveillance Target Attack Radar System (Joint STARS) is a United States Air Force Airborne ground surveillance, battle management and command and control aircraft. It tracks ground vehicles and some aircraft, collects imagery, and relays tactical pictures to ground and air theater commanders. The aircraft is operated by both active duty Air Force and Air National Guard units and also carries specially trained U.S. Army personnel as additional flight crew.

Joint STARS evolved from separate United States Army and Air Force programs to develop, detect, locate and attack enemy armor at ranges beyond the forward area of troops. In 1982, the programs were merged and the U.S. Air Force became the lead agent. The concept and sensor technology for the E-8 was developed and tested on the Tacit Blue experimental aircraft. The prime contract was awarded to Grumman Aerospace Corporation in September 1985 for two E-8A development systems.

In late 2005, Northrop Grumman was awarded a contract for upgrading engines and other systems. Pratt & Whitney, in a joint venture with Seven Q Seven (SQS), will produce and deliver JT8D-219 engines for the E-8s. Their greater efficiency will allow the Joint STARS to spend more time on station, take off from a wider range of runways, climb faster, fly higher all with a much reduced cost per flying hour.

In December 2008, an E-8C test aircraft took its first flight with the new engines. In 2009, the company began engine replacement and additional upgrade efforts. However, the re-engining funding was temporarily halted in 2009 as the Air Force began to consider other options for performing the JSTARS mission.

The Air Force began an analysis of alternatives (AOA) in March 2010 for its next generation ground moving target indication (GMTI) radar aircraft fleet. The study was completed in March 2012 and recommended buying a new business jet-based ISR aircraft, such as an Air Force version of the Navy P-8 Poseidon, and the RQ-4B Global Hawk Block 40. However, at a Senate Armed Services Committee meeting on 20 March 2012, the Air Force said it can not afford a new ISR platform. The E-8 is considered viable in the near and medium terms. As of October 2012, a test plane has had a Hewlett-Packard central computer installed, with work to begin on the rest in 2013. Before the AOA started, Northrop Grumman received funds for two batches of new engines. One set of engines has flown on a JSTARS test plane, and the other set is in storage. The Air Force does not plan to replace the engines of the 16-plane fleet due to the fiscal environment. The company wants to replace the aircraft's data link, but the Air Force will not, due to cost and because they can still receive data through satellite links. Northrop also wants to upgrade its communications with Force XXI Battle Command Brigade and Below because of the Army's shift towards the system. The Air Force says JSTARS is in a phase of the capability improvements and is expected to remain in operation through 2030.