The SpaceX Iridium-6/GRACE-FO launch is targeted for a launch window on Tuesday, May 22, just days after the initially pencilled in date was postponed.
Launch time is expected to commence at about 12.47pm PDT, or 8pm UK time.
SpaceX’s signature Flacon 9 rocket and its precious cargo will blast off from the company’s base of operation in California.
SpaceX tweeted on Saturday: “Static fire test of Falcon 9 complete—targeting May 22 launch of Iridium-6/GRACE-FO from Vandenberg Air Force Base in California.”
Unlike SpaceX’s other launch livestreams broadcast over YouTube, tomorrow’s mission will instead be broadcast online by NASA’s Jet Propulsion Laboratory.
You can watch the SpaceX livestream online by clicking here.
The launch will mark the deployment of NASA’s Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission, a joint operation with the German Research Centre for Geosciences (GFZ).
SpaceX will deliver two twin GRACE-FO satellites into Low Earth Orbit, which will track the movement of water on the planet below.
The two sensitive space probes are finely tuned to monitor the planet’s gravitational fields.
Data collected by the satellite will allow scientists back on Earth to chart the planet’s distribution of mass and model Earth’s oceans, geology and climate.
The satellites are an extension of the Gravity Recovery and Climate Experiment, which was initially deployed in 2002 and retired in 2017.
Alongside the NASA’s probes, SpaceX will also deliver Iridium communications satellite 51-55.
The Iridium-NEXT is low-orbiting satellite operated by US-based Iridium Communications.
The company is developing a network of communication satellites around the globe, beaming down information 24/7.
Members of the public have been invited to witness the launch in person from a viewing point at Hawk’s Nest, near Highway 1 of Vandenberg Air Force Base.
Officials at the military base expect the first stage of the Falcon 9 booster to shine brightly and remain visible in the sky for more than 120 miles from the launch pad.