Lockheed Martin [LMT] yesterday said it received a contract valued at $44 million from the Latvian National Armed Forces for two long-range AN/TPS-77 transportable air surveillance radar systems and options for long-term technical support.

The contract included priced options for up to four additional TPS-77 radars for Estonia and Lithuania.

In 2003, Lockheed Martin delivered one AN/TPS-77 radar each to Estonia and Latvia to expand the capabilities of BALTNET, the joint air surveillance network that monitors the airspace over and around the Baltic states of Estonia, Lithuania and Latvia. Those radars provided air surveillance capabilities that supported the three nations’ entry into NATO in 2004.

Brig. Gen. Juris Maklakovs, commander of the National Armed Forces of Latvia, presided over a contract signing ceremony for the two new radars Dec. 4, saying, “The new radars will further enhance air surveillance within Latvia, while helping us complete our national defense requirements.”

Carl Bannar, vice president and general manager of Lockheed Martin’s Radar Systems business in Syracuse, NY., said, “We are delighted by the confidence that the government of Latvia has again placed in Lockheed Martin. We’re pleased to provide these systems to one of our nation’s strategic allies.”

The AN/TPS-77 is the latest configuration of the world’s most successful 3-D solid-state radar design, the company said in a statement. This transportable radar provides continuous high-quality 3-D surveillance on aircraft targets at ranges out to 250 nautical miles.

The AN/TPS-77 shares commonality with Lockheed Martin’s AN/FPS-117 radar with regard to maintenance activity and Line Replaceable Units.

There are 26 AN/TPS-77s and 127 AN/FPS-117 systems operational in more than 20 countries. Many have performed for years completely unmanned in remote areas, and in a wide range of operational environments.