Lockheed Martin [LMT] in June delivered the third of four highly elliptical earth orbit (HEO) satellite payloads contracted by the Air Force as part of the Space Based Infrared System (SBIRS) missile warning satellite constellation, according to a company statement. The delivery of the HEO-3 payload is the first major delivery from the SBIRS follow-on production contract, which also includes the third and fourth SBIRS satellites and an additional HEO payload, according to Air Force Space Command (AFSPC). Before being…