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The Falcon 9 PEZ mission was pushed back by a whole day after strong upper winds threatened to derail the rocket during launch.
SpaceX has now pencilled in a launch window for Thursday, February 22 at 9.17am EST (2.17pm GMT).
The rocket manufacturer tweeted: “Standing down today due to strong upper level winds.
“Now targeting launch of PAZ for February 22 at 6:17 a.m. PST from Vandenberg Air Force Base.”
SpaceX fonder Elon Musk conceded it was better “to be paranoid” than to risk the rocket and its payload.
He said: “High altitude wind shear data shows a probable 2 percent load exceedance. Small, but better to be paranoid.
“Postponing launch to tomorrow, assuming winds are better then.”
You can watch the SpaceX launch live as it happens tomorrow here: SpaceX launch LIVE stream.
The Falcon 9 is scheduled to liftoff from Space Launch Complex 4 East (SLC-4E) at the Vandenberg Air Force Base rocket facility in California.
SpaceX signature rocket will deliver a Spanish state-of-the-art advanced PAZ radar satellite to snap high resolution pictures of the planet below.
SpaceX launch: The Falcon 9 rocket’s launch was delayed until Thursday
But alongside the PAZ mission, SpaceX is expected to sneak a Starlink satellite prototype on board the Falcon’s cargo hold.
Earlier last week the US Federal Communications Commission (FCC) gave the rocket company the green light to initiate its ambitious Starlink project.
Once operational, Starlink will be an unprecedented network of 12,000 satellites in orbit, beaming down broadband to every corner of the Earth.
The company aims to place 4,425 satellites about 700 miles up and another 7,518 around 210 miles up no later than by 2020.
SpaceX launch: The rocket manufacturer wil deliver a Spanish PAZ satellite into orbit
The two “satellite constellations” will provide high-speed internet access to those remote places where it is a rare commodity.
SpaceX said: “When combined into a single, coordinated system (the ‘SpaceX System’), the LEO and VLEO Constellations would provide both diverse geographic coverage and the capacity to support a wide range of broadband and communications services for residential, commercial, institutional, governmental and professional users in the United States and globally.
Postponing launch to tomorrow, assuming winds are better then
“SpaceX has designed its V-band system to provide efficient, high-capacity connectivity, to include connectivity for rural, remote, and hard-to-reach end-users.
“Operating at an altitude of 1,110 km or more, satellites in the LEO Constellation will have a relatively larger footprint, which will enable them to deploy narrow spot beams over a fairly broad coverage area.”
The plans were praised by the FCC, and chairman Ajit Pai congratulated SpaceX for attempting to deliver terrestrial internet access to everyone in America.
He said: “To bridge America’s digital divide, we’ll have to use innovative technologies.
“SpaceX’s application — along with those of other satellite companies seeking licenses or access to the US market for nongeostationary satellite orbit systems — involves one such innovation.”
He added: “Satellite technology can help reach Americans who live in rural or hard-to-serve places where fibre-optic cables and cell towers do not reach.
“And it can offer more competition where terrestrial internet access is already available.”
Starlink is expected to draw in millions of customers by the time it is operational.