AEHF SCRUB: The U.S. Air Force scrubbed an attempt to launch the second Advanced Extremely High Frequency (AEHF-2) secure communications satellite on May 3 due to a lack of helium flow from ground support equipment into the Interstage Adapter compartment on the Atlas V rocket. Launch provider United Launch Alliance and the Air Force plan another attempt to lift off from Space Launch Complex-41 at Cape Canaveral AFS, Fla., on May 4 during a two-hour window that opens at 2:42 p.m. EDT.

NASA will contract with Boeing for an interim cryogenic propulsion stage to power at least the first two flights of its planned heavy-lift Space Launch System.

A bid by SpaceX to carry out the first U.S. commercial resupply mission to the International Space Station (ISS) is unlikely to lift off May 7, the latest target launch date, according to the company. “SpaceX is continuing to work through the software assurance process with NASA,” according to a May 2 update from company spokeswoman Kirsten Brost Grantham. Earlier, the company slipped a planned April 30 liftoff to allow more time to work software flight-control issues for the planned 18-day test mission.

HOUSTON — Spaceflight brings a whole new meaning to dressing for success. An astronaut’s garments must be functional, yet as comfortable as possible, whether the flier is sealed inside a spacecraft or on a spacewalk. As NASA envisions a future of deep-space exploration and missions stretching from months to years, the list of wardrobe requirements soars as well.

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BEIJING — China plans to add three more satellites to its Compass positioning system this year, following the successful launch of two sats by a single Long March 3B rocket on April 30.

LOS ANGELES — The Operationally Responsive Space (ORS) office is pushing ahead with preparations for three more missions and continuing a key military utility assessment of the ongoing TacSat-4 tactical test spacecraft, despite uncertainty over its future after being zero-funded in the White House’s fiscal 2013 budget.

GOES-R: Lockheed Martin has completed the spacecraft critical design review for the Geostationary Operational Environmental Satellite-R series (GOES-R) satellite system that the company is building for the National Oceanic and Atmospheric Administration and NASA. “The team demonstrated that the design and operations are understood and sufficiently mature to begin the build and integration phase,” Lockheed said in a May 1 announcement. The first spacecraft in the next-generation weather satellite series is due for launch in 2015.