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SpaceX prepares upgraded Starlink satellites for launch – Spaceflight Now



"Following the latest Starlink satellite launch in May, SpaceX increased end-user spectrum capacity through design enhancements that maximize the use of Ka-and-Ku tapes," SpaceX writes in a Monday launch press kit . "In addition, the components of each satellite are 100% destructible and will quickly burn into the earth's atmosphere at the end of their life cycle – a measure that exceeds all current safety standards."

The first 60 Starlink satellites launched on May 23 only transmit Ku-band antennas. SpaceX said at the time that 95 percent of the material in each of the first 60 satellites would burn into the atmosphere after their missions were completed.

Like the first 60 satellites, the new batch of broadband stations launched on Monday will use ion.

Skywatchers at dusk could see Starlink satellites passing overhead in train form, after Monday's launch, of observations of the first 60 satellites since their launch in May. [1

9659002] Satellites reflect more sunlight than expected, creating a brilliant spectacle and sometimes blazing to be as bright as the brightest stars in the sky. The satellites appear to be obscured over time and observations become less frequent as they propagate in their orbital plane.

Bright satellites have attracted the fury of many astronomers, who have worried about the addition of thousands of similarly bright satellites that may interfere with scientific observations using ground-based telescopes.

The Royal Astronomical Society said in June that the large number of broadband satellites offered by SpaceX, Amazon, OneWeb and Telesat "poses a challenge to terrestrial astronomy." without stripes related to satellites, thus compromising astronomical research, "the press release said.

The National Observatory for Radio Astronomy, funded by the National Science Foundation, said in May it was working with SpaceX to "jointly analyze and minimize any potential impacts" on astronomical observations caused by radio transmissions from Starlink satellites.

"These discussions are fruitful and provide valuable guidance that could be addressed by other similar systems," a NAPO statement said. "To date, SpaceX demonstrates its respect for our concerns and their support for astronomy."

NRAO stated that it continues to monitor, analyze and discuss the "evolving parameters" of the Starlink system. The NRAO identified several proposals under consideration, including exclusion zones and other mitigating measures around the current and future facilities for radio astronomy of the National Science Foundation.

SpaceX says it is actively working with leading astronomical groups around the world to make sure their work is not affected by Starlink satellites. Engineers are taking steps to make the groundwork of future Starlink satellites black to "help mitigate the impact on the astronomical community," SpaceX says.

But SpaceX says the batch of satellites launching on Monday does not yet include the change.

SpaceX says it will correct Starlink's orbits if necessary for extremely sensitive space science observations, and the company has discovered the ability of its next-generation Starship to send giant astronomical telescopes into space.

"We have also been actively involved with leading astronomy groups around the world who discuss the profile of the Starlink mission, scientifically evaluate impacts on astronomical activities and evaluate any useful mitigating advances," said a SpaceX official.

SpaceX Falcon 9 rocket stands vertically at Cape Canaveral Complex 40 Sundays. Credit: SpaceX

The 60 Starlink satellites launched on Monday weighed about 573 pounds (260 kilograms), according to SpaceX. Flat panel satellites are stacked in the Falcon 9's interior upper compartment, almost filling the payload of the rocket.

Satellites combine to form the heaviest payload ever launched by SpaceX, turning over scales over 34,000 pounds or about 15.6 metric tons.

SpaceX turned the fully assembled Falcon 9 rocket to pad 40 at Cape Canaveral on Sunday afternoon, then lifted the vertical rocket 229 feet (70 meters) high before the final counts.

The two-stage rocket will be loaded with super-cooled kerosene and liquid oxygen fuel starting at 9:21 AM EST (1421 GMT). The automatic sequencer will record the latest pre-flight checks and configure the ignition of a Falcon 9 rocket on its nine major Merlin 1D engines in about T-minus 3 seconds.

Merlin engines will mute to full power and propel the Falcon 9 from the launch pad at 9:59 pm EST with a 1.7 million pound thrust. The rocket-based control actuators will point the Falcon 9 northeast of Cape Canaveral until the first-stage engines shut down at T + plus 2 minutes, 33 seconds.

Three seconds later, the first leg of the Falcon 9 will detach and begin its controlled descent to the SpaceX drone "Of course I still love you", located in the Atlantic Ocean, approximately east of Charleston, South. Carolina.

The Merlin single engine in the second stage will ignite at T + plus 2 minutes, 44 seconds to continue the mission in orbit. The Falcon 9 payload Facebook will collide clam with clam at T + plus 3 minutes and 24 seconds after the rocket has flown through the thick layers of the atmosphere.

As with the first stage, the two halves of the

mission on Monday will mark the first time SpaceX will attempt to catch both halves of the payload tensioner.

A new recovery boat called "Ms. Boss, ”she was provided with a giant net to catch payloads as they parachute. Mrs.'s main recovery ship departed for Port Canaveral, Florida, with the sister ship, "Mrs. Tree ”- also provided with a network guideline to the descent zone of the Atlantic.

Landing on the first stage of Falcon 9 is expected at T + plus 8 minutes, 24 seconds. Emerging double fairing recovery boats will attempt to attach both parts of the Falcon 9 utility shell about 45 minutes after the exit, according to SpaceX.

Meanwhile, the second phase of the Falcon 9 will shut down its engine in T + plus 8 minutes, 49 seconds, after reaching a preliminary parking orbit. After a 36-minute coat, the upper stage will ignite again at T + plus 44 minutes, 50 seconds, for a brief two-second shot to inject Starlink satellites into an orbit 174 miles (280 kilometers) high. [19659002] The satellites will separate from the upper stage of the Falcon 9 in T + plus 60 minutes, 43 seconds, according to SpaceX's press kit.

The satellites are expected to emerge from the forward edge of the rocket at once instead of once or in pairs, as spacecraft often do when separated from a launch vehicle.

The first time a Starlink Falcon 9 launches, it launches launchers to put it in rotation before deploying satellites. The inertia of rotation helped the satellites to disperse before the ship individually activated its propulsion systems to begin climbing to its final operating altitude of approximately 341 miles (550 kilometers) above Earth.

SpaceX says that injecting satellites into a lower orbit at an altitude of 174 miles will give time to the cassettes before orbiting. The Starlink satellites launched in May were located in a higher orbit at an altitude of 440 kilometers.

The second stage of the Falcon 9 will perform de-combustion combustion and plunge back into the atmosphere over the Indian Ocean. [19659034] (function (d, s, id) {
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