SpaceX launch will resume deployment of upgraded Starlink satellites – Spaceflight Now

Watch our live coverage of the countdown and launch of the SpaceX Falcon 9 rocket on the Starlink 6-2 mission at 9:47 AM EST (1347 GMT) on April 19 from Space Launch Complex 40 at Space Force Station Cape Canaveral, Florida. Follow us Twitter.

SFN Live

SpaceX plans to resume launching its upgraded second-generation Starlink satellites Wednesday from Cape Canaveral, nearly two months after some spacecraft encountered the first batch of larger, more capable Starlink V2 Mini satellites shortly after liftoff.

Twenty-one second-generation Starlink V2 Mini satellites atop a Falcon 9 rocket are set to lift off at 9:47 a.m. EDT (1347 UTC) from Pad 40 at Cape Canaveral Space Force Station, the second of four immediate launch times. Available for assignment Wed.

There’s an 85 percent chance of favorable weather triggering on Wednesday, according to the US Space Force’s 45th Meteorological Squadron. The main weather concerns relate to terrestrial winds and thick clouds over the launch site.

This mission, known as Starlink 6-2, will continue to launch SpaceX’s new Starlink V2 Mini satellite platform equipped with improved phased array antennas with four times the communications power of previous generations of Starlink satellites, known as v1.5, to send internet signals to consumers. around the world. Despite its name, the Starlink V2 Mini satellites are four times bulkier and larger than the older Starlink V1.5 satellites.

The “Mini” moniker refers to SpaceX’s plans to launch a larger, full-size Starlink V2 satellite design on the company’s massive new Starship rocket. Starship has nearly 10 times the payload capacity of a Falcon 9 rocket, with a larger satellite size as well.

The full-size Starlink V2s will be able to send signals directly to mobile phones. But as preparations for the Starship rocket’s first test flight into space continue, SpaceX has begun launching second-generation satellites on Falcon 9 rockets and has developed V2 Minis to fit the company’s existing launch vehicles.

The first group of 21 Starlink V2 Mini satellites launched Feb. 27 on a Falcon 9 rocket, but most of those spacecraft have yet to begin maneuvering into SpaceX’s fleet of operations. Like all Starlink launches, the Falcon 9 rocket with the first batch of Starlink V2 Mini spacecraft launched the payloads into an orbit roughly 230 miles (370 kilometers) below final operating altitude. The satellites were then supposed to use onboard thrusters to raise their orbits to an altitude of more than 300 miles (500 kilometers).

Elon Musk, founder and CEO of SpaceX, tweeted that the first batch of Starlink V2 Mini satellites were “having some issues, as expected.” SpaceX planned to thoroughly test the satellites before boosting them above the International Space Station’s altitude to its final operational orbit. Musk said that some of the Starlink V2 Mini-upgraded satellites at launch on February 27 could be deorbited without entering service at all.

See also  DNA analysis revealed the identity of mysterious fossils found in a Chinese cave

As of Wednesday, two of the first 21 Starlink V2 Mini satellites have ejected to re-enter the atmosphere and burn up, according to a scheduler by Jonathan McDowell, an astrophysicist and expert in spaceflight activity tracking. Three of the Starlink V2 Mini satellites appear to be heading toward operational altitude, and another 16 remain in low orbit, presumably still undergoing tests and checks.

While SpaceX worked out issues with its first batch of Starlink V2 Mini satellites, the company went back to launching more older-design Starlink V1.5 satellite constellations on Falcon 9 rockets in March.

Now it looks like SpaceX is ready to resume launching Starlink V2 Minis.

SpaceX launch will resume deployment of upgraded Starlink satellites – Spaceflight Now
Side-by-side comparison of Starlink V1.5 and Starlink V2 Mini satellites. Credit: SpaceX / Spaceflight Now

In addition to improved communications capability, the Starlink V2 Mini satellites have more efficient, higher-powered argon-fueled thrusters. Argon is cheaper than the Kryptonian gas used to power the ion thrusters of the older generation Starlink V1.5 satellites.

“This means Starlink can deliver more bandwidth while increasing reliability and connecting millions of people around the world to high-speed internet,” SpaceX said ahead of the first launch of the Starlink V2 Mini satellites in February.

Each Starlink V2 Mini satellite weighs approximately 1,760 lb (800 kg) at launch, nearly three times heavier than older Starlink satellites. It’s also larger, with a spacecraft fuselage more than 13 feet (4.1 meters) wide, and filling more payload for a Falcon 9 rocket during launch, according to regulatory filings with the Federal Communications Commission.

The larger, heavier satellite platform means the Falcon 9 rocket can only launch about 21 Starlink V2 Mini payloads at a time, compared to more than 50 Starlink V1.5s in a single Falcon 9 launch.

The deployable solar panels on each Starlink V2 Mini satellite span 100 feet (30 meters) end-to-end. Each of the previous generation Starlink V1.5 satellites has a single solar array wing, with each spacecraft measuring approximately 36 feet (11 meters) end-to-end once the solar panel is extended.

The improvements give the Starlink V2 Mini satellites a total surface area of ​​1,248 square feet, or 116 square meters, more than four times the area of ​​a Starlink V1.5 satellite.

Federal Communications granted approval for SpaceX on December 1 to launch up to 7,500 of the planned 29,988 Starlink Gen2 constellations, which will be deployed in slightly different orbits than the original Starlink fleet. The regulatory agency has delayed a decision on the remaining proposed second-generation SpaceX satellites.

See also  The discovery of water frost on Mars volcanoes in the first “important” discovery: a study

Specifically, the FCC has authorized SpaceX to launch the initial mass of 7,500 Starlink Gen2 satellites into orbits at 525, 530, and 535 kilometers, with inclinations of 53, 43, and 33 degrees, respectively, using Ku-band frequencies. and Ka-band. .

The FCC previously authorized SpaceX to launch and operate approximately 4,400 first-generation Ka-band and Ku-band Starlink spacecraft launched by SpaceX since 2019.

With Wednesday’s launch, SpaceX will have flown 372 Starlink Gen2 satellites into orbit, and deployed 4,238 Starlinks satellites in total, including test modules that are no longer in service. There are currently more than 3,900 Starlink satellites in orbit. According to McDowell.

The Starlink 6-2 mission will be the second launch to deploy SpaceX’s updated and larger Starlink V2 Mini spacecraft platform. Credit: Spaceflight Now

Gen2 satellites can improve Starlink’s coverage in low latitudes, and help relieve pressure on the network from increased consumer uptake. SpaceX says the network has more than 1 million active subscribers, most of whom are homes in areas where traditional fiber connectivity is unavailable, unreliable, or expensive.

During Wednesday’s countdown, the SpaceX launch team will be stationed inside the Launch Control Center south of Cape Canaveral Space Force Station monitoring key systems on the Falcon 9 rocket and at the launch pad. SpaceX will begin loading ultra-cold condensed kerosene and liquid oxygen propellants into the Falcon 9 vehicle in T-minus 35 minutes.

Helium pressure will also flow into the rocket in the last half hour of the countdown. In the final seven minutes before liftoff, Merlin’s Falcon 9 main engines will be thermally conditioned for flight through a procedure known as a “chilldown”. The Falcon 9’s guidance and field safety systems will also be configured for launch.

After liftoff, the Falcon 9 rocket will direct its 1.7 million pounds of thrust — produced by nine Merlin engines — to steer into the Southeast Atlantic. The Falcon 9 rocket will exceed the speed of sound in about one minute, then shut down its nine main engines two and a half minutes after liftoff. The booster stage will separate from the Falcon 9’s upper stage, then pulses from cool-gas control thrusters will fire and extend titanium grille fins to help guide the vehicle back into the atmosphere.

Two braking burns will slow the rocket as it descends on the drone ship “A Shortfall of Gravitas” about 410 miles (660 kilometers) about eight and a half minutes after liftoff. The reusable booster, named B1073 in SpaceX inventory, will fly on its eighth flight into space on Wednesday.

The Falcon 9’s reusable payload supply will be discarded during the second stage burn. There is also a salvage ship on station in the Atlantic Ocean to recover the nose cone halves after they fall off under parachutes.

See also  Record-breaking swarm of earthquakes hits Antarctica as a sleeping volcano awakens

The first-stage landing on Wednesday’s mission will occur just as the Falcon 9’s second-stage engine cuts out to deliver the Starlink satellites to a first standing orbit. The other upper stage, which burns 54 minutes into the mission, will re-orbit before separating the payload.

The 21 Starlink spacecraft, built by SpaceX in Redmond, Washington, are expected to separate from the Falcon 9 rocket about 65 minutes after liftoff.

The Falcon 9’s guidance computer aims to deploy the satellites into an orbit at an inclination of 43 degrees to the equator, at an altitude of between 213 miles and 219 miles (344 by 353 kilometers). After separating from the rocket, the 21 Starlink spacecraft will launch the solar arrays, run them through the automated activation steps, and then use argon-fueled ion engines to maneuver them into operational orbit.

rocket: Falcon 9 (B1073.8)

Payload: 21 Starlink V2 small satellites (Starlink 6-2)

Launch site: SLC-40, Cape Canaveral Space Station, Florida

Lunch date: April 19, 2023

launch time: 9:47 a.m. EST (1347 GMT)

weather forecast: 85% chance of fair weather; low risk of upper level winds; Reduced risk of conditions unfavorable to an enhanced recovery

Recovery from boost: Drone vessel named “A Shortfall of Gravitas” northeast of the Bahamas

AZIMUTH LAUNCH: southeast

target orbit: 213 miles by 219 miles (344 kilometers by 353 kilometers), 43.0 degrees

Launch timeline:

  • T+00:00: take off
  • T+01:12: Max Air Pressure (Max-Q)
  • T+02:25: First Engine Main Cut Off (MECO) Stage
  • T+02:28: Separation phase
  • T+02:34: Second stage engine ignition (SES 1)
  • T+03:06: Quiet off
  • T+06:08: First stage entry burner ignition (three engines)
  • T+06:31: First stage entry afterburner cut off
  • T+08:03: First stage burner ignition (single engine)
  • T+08:26: First stage landing
  • T+08:36: Second stage engine cut off (SECO 1)
  • T+54:23: Second stage engine ignition (SES 2)
  • T+54:26: Second Stage Engine Cut Off (SECO 2)
  • T+1:05:13: Starlink satellite disconnected

Mission statistics:

  • Number 218 of the Falcon 9 rocket since 2010
  • The 228th launch of the Falcon family since 2006
  • The eighth Falcon 9 Booster B1073 launch
  • Flight 158 ​​of the repurposed Falcon booster
  • SpaceX launch 185th from the Florida Space Coast
  • Launch of the 121st Falcon 9 from Platform 40
  • 176th launch overall from the 40 board
  • The 80th Falcon 9 launch is primarily for the Starlink network
  • Falcon 9 launch, 24th, in 2023
  • SpaceX’s 25th launch in 2023
  • Launch Attempt 19 into orbit from Cape Canaveral in 2023

Email the author.

Follow Stephen Clark on Twitter: @employee.

Leave a Reply

Your email address will not be published. Required fields are marked *