[Picture taken at SR-94 westbound at the I-805 ramp. Viewer submitted photo: December 22, 2017.]
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SAN DIEGO (NEWS 8/AP) - An Earth-observation satellite built for Spain was successfully launched into orbit from California at dawn Thursday, creating a brief light show as it arced over the Pacific Ocean west of Los Angeles.
A SpaceX Falcon 9 rocket, reusing a first stage that had flown on a previous launch, lifted off at 6:17 a.m. from Vandenberg Air Force Base.
Californians were hoping for a repeat of the spectacle that occurred during a Dec. 22 Falcon 9 launch during exceptionally clear twilight conditions, but this time the sky was much brighter, making the plume less brilliant.
The Falcon's first stage was used to launch a satellite for Taiwan last August and was recovered by landing it on a drone ship in the Pacific. This time there was no effort to recover the first stage and it fell into the sea.
SpaceX, however, was attempting to recover the fairing — the aerodynamic covering that protects the satellite during the early phase of launch and is usually discarded after reaching altitudes where the atmosphere's density is low.
SpaceX founder Elon Musk tweeted that the fairing system deployed a parafoil and there was an attempt to catch it during descent, presumably by an aircraft, but that failed.
"Missed by a few hundred meters, but fairing landed intact in water. Should be able catch it with slightly bigger chutes to slow down descent," Musk tweeted. Recovering and reusing major pieces of rockets is one of Musk's key strategies.
The rocket's primary payload was a satellite named PAZ for Spanish satellite operator Hisdesat. It carries an advanced instrument for making radar images of Earth for government and commercial purposes, as well as sensors for tracking ships and weather.
The satellite was designed for a 5½-year mission, orbiting Earth 15 times each day at an altitude of 514 kilometers (319 miles), covering the entire planet every 24 hours. It joins two other radar satellites in the same orbit covering the same ground, increasing acquisition of data.
SpaceX confirmed that the rocket also carried two small experimental satellites for tests involving a proposed system that would bring internet access to remote areas. The system would require thousands of satellites operating in low Earth orbit.
The original launch was set for Sunday, February 18 at 6:16 PST, but was scrubbed to give the SpaceX team more time to check the rocket's upgraded nose cone.
In a tweet on Monday, SpaceX said the rocket is vertical and the weather is 90% favorable for launch.
Falcon 9 and PAZ are vertical on Space Launch Complex 4E at Vandenberg Air Force Base in California. Weather is 90% favorable for tomorrow's launch at 6:17 a.m. PST, 14:17 UTC. pic.twitter.com/bL1VjHmIhV— SpaceX (@SpaceX) February 20, 2018
An earlier tweet from SpaceX on Saturday, February 17 said, "Team at Vandenberg is taking additional time to perform final checkouts of upgraded fairing. Payload and vehicle remain healthy. Due to mission requirements, now targeting February 21 launch of PAZ."
Team at Vandenberg is taking additional time to perform final checkouts of upgraded fairing. Payload and vehicle remain healthy. Due to mission requirements, now targeting February 21 launch of PAZ.— SpaceX (@SpaceX) February 17, 2018
The plan is to launch the first of two prototypes for its “vast satellite-internet constellation”.
According to space.com:
The main purpose of the launch is getting the Paz satellite to orbit for Spanish operator Hisdesat. Paz will generate sharp radar imagery of Earth for a variety of customers, including the Spanish government, over the course of the satellite's 5.5-year mission.
SpaceX launched 10 communications satellites into orbit from Vandenberg Air Force Base Friday December 22, 2017. The launch was visible across most of Southern California, which was treated to a spectacular light show as the rocket streaked across the sky. Camera-wielding witnesses snapped photos and quickly posted them on social media, with many wondering if it was a UFO.
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