Two of the leading contenders for the $30 million Google Lunar X Prize have merged, pooling their technical and marketing resources to push for a robotic mission to the Moon’s surface early in 2015. Moon Express Inc., a Silicon Valley startup going after the X Prize as its first step toward a commercial payload-delivery business, acquired the Rocket City Space Pioneers team in an acquisition agreement with Dynetics.

A system developed to provide precise positioning in areas denied signals from navigation satellites is to be deployed to enable testing of military GPS receiver performance during jamming. The ground-based non-GPS positioning system from Locata is also being looked at as a backup at critical national infrastructure sites that use GPS for precise timing, such as mobile communications, electronic commerce and power-grid synchronization.

Government satellite operators in the U.K. and Mexico are taking delivery of two large telecommunications satellites following the night launch of the 10th Ariane V mission this year. Liftoff of the big European rocket came at 4:49 p.m. EST (6:49 p.m. local time) Wednesday from the European launch center at Kourou, French Guiana. On board were Skynet 5D and Mexsat Bicentenario.

ANOTHER TRY: The U.S. Air Force is planning to use the RL10B-2 engine for a late February flight of the fifth Wideband Global Satcom satellite on a Delta IV rocket, according to Dave Madden, who directs the Air Force’s military satellite communications system program office. The Delta IV, which uses the RL10B-2 to power the upper stage, malfunctioned during an Oct. 8 GPS IIF launch and has not flown since. Air Force officials have yet to find a root cause for the low-thrust anomaly.

It must be compatible with existing launch vehicles and use industry-standard payload adapters and electrical connectors.

Doubts still hang over the military utility of small satellites, holding back progress on low-cost, quick-reaction systems that could be launched at short notice to fill gaps in space coverage. To prove their viability, the U.S. Defense Advanced Research Projects Agency (Darpa) has begun a program to demonstrate that small satellites produced and launched on demand can provide imagery on request directly to individual soldiers.

HOUSTON — A Russian Soyuz rocket reached orbit early Dec. 19 with a three-man multinational crew that includes veteran astronaut Chris Hadfield, who is scheduled to become the first Canadian to command the International Space Station in mid-March. The Soyuz TMA-07M capsule carrying cosmonaut Roman Romanenko, NASA astronaut Tom Marshburn and Hadfield was on course to dock with the 256-mi.-high station’s Rassvet module on Dec. 21 at 9:12 a.m., EST.

NASA’s fuel-depleted Gravity Recovery and Interior Laboratory (Grail) A and B lunar mission probes slammed into a mountain near Goldschmidt crater at the Moon’s North Pole late Dec. 17, ending a one-year mission. The carefully targeted impact of the two washing machine-sized spacecraft, renamed Ebb and Flow, occurred on schedule, with Ebb striking first at 5:28 p.m. EST, and Flow striking 32 sec. later. The spacecraft impacted the Moon at 3,800 mph.