WASHINGTON — Integral Systems will revise its approach to a system intended to locate and characterize sources of interference to U.S. military communications satellites under a $77.7 million contract modification awarded by the U.S. Air Force.

Lanham, Md.-based Integral since 2005 has been developing the Rapid Attack Identification and Reporting System (RAIDRS) Block 10 for the Air Force Space and Missile Systems Center. Originally planned for deployment in 2007, the program was scaled back and delayed in order to keep costs under control, the service has said. Integral has to date received contracts totaling $76.2 million for RAIDRS.

Under the previous configuration, Integral would have delivered six fixed RAIDRS installations and three deployable sites. Under the revised program, the company will deliver five deployable sites, the U.S. Defense Department said in a Sept. 26 press release.