At least two companies are in the running to supply the Air Force’s next ground-based radar system, with Northrop Grumman [NOC] and Lockheed Martin [LMT] submitting bids this week.

Proposals were due April 15 for the Three-Dimensional Expeditionary Long-Range Radar (3DELRR) “SpeedDealer,” which would replace the service’s AN/TPS-75 airborne target detection radars, built by Northrop Grumman. The Air Force intends to award up to three prototype Other Transaction Agreements of up to $500,000 for the companies to demonstrate their solutions, which could then lead to a follow-on production agreement for up to 35 systems.

Mike Meaney, vice president of land and maritime sensors at Northrop Grumman, confirmed it submitted a proposal to the Air Force in an April 16 email to Defense Daily.

“Northrop Grumman is in the best position to deliver a mature solution, already in full-rate production, that provides true multi-mission performance,” Meaney said. “We specialize in developing active electronically scanned array (AESA) solutions architected for superior long-range performance with enhanced survivability to counter evolving and emerging threats.”

He did not reveal which system was submitted, but a potential candidate is the company’s Gallium Nitride-based (GaN) AN/TPS-80 Ground/Air Task-Oriented Radar (G/ATOR) system in development for the Marine Corps.

Northrop Grumman received a $958 million contract last June for Lot 6 Full Rate Production for the Active Electronically Scanned Array (AESA) multi-mission radar, which included 30 units. The Marine Corps also added two more G/ATOR systems to its Lot 2 contract in February (Defense Daily, Feb. 5).

A spokesperson for Lockheed Martin confirmed in a Wednesday email that the company also planned to submit a bid, but did not elaborate on the system that will be proposed.

Inside Defense first reported earlier this year that the Air Force canceled its original $71.8 million Engineering and Manufacturing Development (EMD) SpeedDealer contract with Raytheon [RTN] due to numerous technical and supplier issues that caused schedule delays. Raytheon did not return a request for comment Thursday on whether it re-submitted a bid for the new contract.