A blanket of thick clouds over Cape Canaveral Friday forced SpaceX to delay liftoff of a Falcon 9 rocket and an Italian radar remote sensing satellite until Saturday, setting up Florida’s Space Coast for launches on back to back days this weekend, with another SpaceX flight already booked on the range for Sunday.
SpaceX’s planned launch of Italy’s COSMO-SkyMed radar surveillance satellite was originally scheduled Thursday, but rain showers, low visibility, and thick clouds caused officials to call off the launch attempt before loading propellants into the Falcon 9 rocket.
Conditions at Cape Canaveral improved Friday, but a blanket of thick clouds remained in place over the spaceport. SpaceX scrubbed the launch with fewer than 10 minutes left in the countdown.
SpaceX will try again at 6:11 p.m. EST (2311 GMT) Saturday. The Falcon 9 rocket will fly south from Cape Canaveral’s Complex 40 launch pad over the Atlantic Ocean, tracking parallel to Florida’s east coast, then over the Straits of Florida, Cuba, and the Caribbean Sea to place the Italian radar imaging satellite into a polar orbit.
The reusable first stage booster, flying for the third time, will return to Landing Zone 1 at Cape Canaveral for a propulsive touchdown.
Meanwhile, SpaceX technicians a few miles to the north of pad 40 at Kennedy Space Center prepared late Friday to roll another Falcon 9 rocket out to pad 39A. That rocket is scheduled to take off at 2:39 p.m. EST (1939 GMT) Sunday with another batch of 49 satellites for SpaceX’s Starlink internet network.
A backup launch opportunity is available for the Starlink mission at 5:56 p.m. EST (2256 GMT) Sunday).
The target launch times are separated by 20 hours, 28 minutes, which would mark the shortest span between two orbital departures from Florida’s Space Coast since 1967.
As with all rocket launches, SpaceX will only pull off the feat if weather and technology cooperate.
There’s an 80% chance of good weather Saturday evening for SpaceX’s rescheduled launch of an Italian COSMO-SkyMed radar satellite, with a moderate risk of unfavorable winds aloft, according to the U.S. Space Force’s 45th Weather Squadron.
For Sunday’s mission, forecasters expect a 90% chance of acceptable launch weather on the Space Coast. There’s a moderate risk of out-of-limits wind and sea conditions downrange at the booster’s offshore landing zone near the Bahamas.
The primary weather concern Saturday evening is ground winds, which are forecast to be gusting from the northwest to near 25 mph following the arrival of a strong cold front, causing temperatures to drop to around 45 degrees Fahrenheit by launch time.
On Sunday, the only slight weather issue is with cumulus clouds, which could contribute to a lightning risk as the Falcon 9 climbs through the atmosphere.
SpaceX is slated to follow the launches this weekend with another Falcon 9 flight from Vandenberg Space Force Base in California on Wednesday, Feb. 2. The Falcon 9 rocket set for launch from California will carry a classified payload into orbit for the National Reconnaissance Office, the U.S. government’s spy satellite agency.
SpaceX has already launched three Falcon 9 missions since the start of the year, and is on pace to complete six Falcon 9 launches in less than four weeks, assuming the next three flights occur as scheduled.
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Follow Stephen Clark on Twitter: @StephenClark1.
from Spaceflight Now https://bit.ly/3r9mX7G
via World Space Info
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