A SpaceX Falcon 9 booster blasted off from Vandenberg Air Force Base on Tuesday afternoon and successfully orbited seven satellites.
There were five Iridium-NEXT communications satellites aboard. These were the 51st through 56th Iridium-NEXT spacecraft orbited by Falcon 9 boosters.
A pair of Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) satellites were also onboard. The spacecraft will measure changes in how mass is redistributed within and among Earth’s atmosphere, oceans, land and ice sheets, as well as within Earth itself.
The mission is a join collaboration of NASA and the German Research Centre for Geosciences (GFZ). GFZ reports receiving signals from both GRACE-FO satellites.
A German-American science mission scheduled to launch this week is running nine months behind schedule due to issues with launch vehicles. However, the delays turned out to be a blessing in disguise for the project, according to a Government Accountability Office (GAO) assessment.
The twin Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) satellites are set to launch on Tuesday at 12:47:58 p.m. PDT (3:47:58 p.m. EDT; 1947:58 GMT) aboard a SpaceX Falcon 9 booster from Vandenberg Air Force Base in California. The launch will be webcast at www.nasa.gov and www.spacex.com.
There are a dozen orbital launches planned around the world through the end of June.
China will lead off on Sunday as it launches its Chang’e-4 lunar relay satellite from Xichang. A lunar lander and rover targeted for the far side of the moon is scheduled for launch at the end of the year.
Orbital ATK will follow with the launch of a Cygnus resupply ship bound for the International Space Station (ISS) on Monday from Wallops Island. On Tuesday, SpaceX is scheduled to launch 5 Iridium Next satellites and a pair of scientific spacecraft for NASA.
Other notable missions scheduled through June include a Soyuz crew mission and a SpaceX Dragon resupply flight. Rocket Lab is probably going to launch the first commercial flight of its Electron booster from New Zealand. However, the company has not published a launch window for the flight.
The current global schedule is below. Be sure to check Space Flight Now’s launch schedule for updates.
PASADENA, Calif. (NASA PR) — Imagine standing on the roof of a building in Los Angeles and trying to point a laser so accurately that you could hit a particular building in San Diego, more than 100 miles (160 kilometers) away. This accuracy is required for the feat that a novel technology demonstration aboard the soon-to-launch Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission will aim to achieve. For the first time, a promising technique called laser ranging interferometry will be tested between two satellites.
MCLEAN, Va., April 09, 2018 (Iridium PR) — Iridium Communications Inc. (NASDAQ:IRDM) announced today that the Iridium-6/GRACE-FO rideshare mission, the sixth Iridium® NEXT launch overall, has been targeted for launch by SpaceX from Vandenberg Air Force Base (VAFB) in California for May 19, 2018 at approximately 1:03 PM PDT (20:03 UTC). An exact instantaneous launch window time will be available closer to launch.