SpaceX 2024

[Nathan45]

Thank God for autistic South African trolls...

[Micael]

Good comparison for visualization of the size of the booster.

[Rocket J Squrriel]

The FAA says that they don't need a separate investigation of the last flight as everything occurred within the parameters SpaceX laid out and the FAA agreed to.

FAA also said they can do the next launch whenever SpaceX is ready.

[brovane]

Good summary article by NSF (Nasa Space Flight) of the 1st half of SpaceX's record breaking year. It is a long article but SpaceX had a lot of accomplishments for the 1st half of 2024.

https://www.nasaspaceflight.com/news/spacex/

SpaceX continues to break records with its Falcon rockets during 2024 completing to date a total of 67 missions so far and putting the company on track to complete 135 launches by the end of it. SpaceX also unveiled a new extravehicular activity suit, completed several missions for the US and foreign governments, as well as started operational deployment of Starlink Direct to Cell and Starshield satellites.

SpaceX’s Starship rocket also performed its fourth flight, successfully completing a full mission from launch to soft landing of both stages on the water. The company is also making great progress in building a second Starship launch pad in South Texas while pushing through regulatory milestones for Starship launchpads at Launch Complex 39A and Space Launch Complex 37 in Florida.

Over the following months, SpaceX is aiming to increase its cadence of Falcon missions even further, dealing with the incoming hurricane season, and preparing for another Starship flight. This flight is also set to feature the first-ever recovery attempt of a Super Heavy booster back at the company’s launch site in Starbase, Texas.

SpaceX continues to break records with its Falcon rockets during 2024 completing to date a total of 67 missions so far and putting the company on track to complete 135 launches by the end of it. SpaceX also unveiled a new extravehicular activity suit, completed several missions for the US and foreign governments, as well as started operational deployment of Starlink Direct to Cell and Starshield satellites.

SpaceX’s Starship rocket also performed its fourth flight, successfully completing a full mission from launch to soft landing of both stages on the water. The company is also making great progress in building a second Starship launch pad in South Texas while pushing through regulatory milestones for Starship launchpads at Launch Complex 39A and Space Launch Complex 37 in Florida.

Over the following months, SpaceX is aiming to increase its cadence of Falcon missions even further, dealing with the incoming hurricane season, and preparing for another Starship flight. This flight is also set to feature the first-ever recovery attempt of a Super Heavy booster back at the company’s launch site in Starbase, Texas.

Falcon and Dragon

During the second quarter of 2024, SpaceX’s Falcon family of rockets completed a total of 36 missions, adding to the 31 launches completed during the first quarter and totaling 67 missions in 2024 so far. This number of missions accomplished is already higher than the number of missions SpaceX completed just two years ago in 2022 which was 61.

These 36 missions accounted for 58 percent of all orbital launches worldwide between April and June, continuing the trend of being the most active rocket family in the world. This number more than doubles the number of launches by the second country in the world with the most launches, China, which completed 16 missions during the same period.

This record-breaking cadence keeps SpaceX on track to complete 135 launches by the end of 2024, an increase of 10 launches from the projection in NSF’s article at the end of the first quarter of the year. This increase comes as a result of a large surge in the launch cadence accomplished by the company during this second quarter of the year.

This included launching 14 Falcon 9 missions in a single calendar month during May, the most that SpaceX has been able to accomplish to date. This cadence was accomplished thanks, once again, to record-breaking launchpad turnarounds and droneship turnarounds.

The three turnaround goals

In early 2023, SpaceX teams at Space Launch Complex 40 (SLC-40) set three different turnaround time goals for this launchpad to be accomplished at different points in time. The first one was aiming to accomplish a turnaround time between missions of under four days, something the company achieved already later in the year in August 2023.

The second goal was aimed at lowering this turnaround time further to just under 69 hours by March 2024, with the intention that this would mean a turnaround time of less than three days. While SpaceX did not achieve this in March 2024, the company did accomplish this goal just a month later between the Starlink Group 6-48 and Starlink Group 6-49 missions with a turnaround time of exactly 68 hours.

The company would once again break this record in June with a turnaround time of 67 hours and 40 minutes between the SES-24/Astra-1P and the Starlink Group 10-3 missions. The third and more challenging goal for the teams will now be to shrink this down to under two days by 2025.

In April 2024, SpaceX also broke its turnaround time record at Space Launch Complex 4 East (SLC-4E) in Vandenberg with a four-and-a-half-day turnaround time between the Starlink Group 8-1 and USSF-62 missions.

Marine assets

The company also continued its record-breaking use of its marine assets during the second quarter of 2024. In May, SpaceX’s Autonomous Spaceport Drone Ship A Shortfall Of Gravitas (ASOG) supported two separate landing and recovery campaigns just three and a half days in between, beating the previous drone ship turnaround record by one whole day.

Ever since the end of last year, SpaceX has been using the Signet Warhorse III tug to move the drone ship in and out to the landing zone. This tug is much more powerful than the ones that the company had been using, which also included the use of the multipurpose recovery vessels Bob and Doug. Under the power of this tug, SpaceX’s East Coast drone ships can move across the ocean at an average speed of eight to nine knots, with peak speeds of up to 12 knots, even when a Falcon 9 booster is on the deck.

But with only one tug like this, it meant that only one drone ship could benefit from these increased speeds at one time. However, in May 2024, SpaceX hired another similarly powerful tug, Signet Warhorse I, which is now being used in parallel to its sister tug. With both tugs now in use, both East Coast drone ships can travel back and forth to their landing sites much more quickly. A secondary effect of this is that now these droneships can spend slightly more time at Port Canaveral than before and still accomplish a fast turnaround because they don’t take as much time to travel as they did in the past.

Reuse records

The second quarter of 2024 also saw the first time a Falcon 9 booster hit the 20-flight milestone. The booster that hit this milestone, B1062, also became the first to reach 21 and 22 flights during this quarter, achieving an average cadence of one flight per month. As of the time of writing, another three boosters, B1060, B1061, and B1067, have all reached or surpassed the 20-flight mark.

One of these boosters, B1060, was expended on its 20th flight during the Galileo FM25-FM27 mission due to the demanding performance conditions imposed by the mission. Another booster, B1087, was also expended on its first and only flight supporting the GOES-U mission as the center core for the Falcon Heavy rocket that carried that mission out.

Two new boosters joined the fleet during the second quarter of 2024, B1072 and B1086, which supported the GOES-U mission as the Falcon Heavy side boosters. Another booster, B1085, was also tested at SpaceX’s rocket development facility in McGregor, Texas. It has been shipped to Florida where it is believed to be flown on the upcoming Crew-9 mission for NASA.

This booster fleet has also been complemented by SpaceX’s fairing fleet. The Starlink Group 10-2 mission in June featured the first time a fairing half was flown for a 20th time, the most currently known for a fairing half. Earlier in May, another fairing half was turned around in less than 13 days which is the shortest turnaround time known for a fairing half.

SpaceX rarely updates on the status of its fairing fleet but, notably, no fairing halves were lost or expended during the second quarter of the year and only two missions used new fairing halves. The company also used flight-proven fairings on a National Security Space Launch (NSSL) mission for the first time on the USSF-62 mission.

Cadence struggles

While all of this has been a favorable factor in SpaceX’s goal to achieve 148 launches by the end of the year, there have been several struggles with Falcon’s cadence during June.

During the middle of this month, SpaceX experienced several delays to the Starlink Group 10-2 mission due to bad weather in Florida. This mission was later postponed due to an issue at engine startup that needed the inspection and replacement of the booster that was supposed to launch this mission, B1073. Following this delay, SpaceX also prioritized a customer mission, SES-24/Astra-1P, further delaying any launch from Florida. The mission was later launched successfully using a different booster, B1078.

Due to this, SpaceX experienced the longest gap between launches from Florida since last year at almost 13 days between Starlink Group 10-1 and the launch of SES-24. The weather at Vandenberg was more favorable though, which meant the company was able to complete a mission from its west coast launch site before that SES mission.

All in all, this turned out to be the longest gap between any SpaceX launches since December 2023 at about 10.5 days in between the Starlink Group 8-8 mission and the Starlink Group 9-1 mission. Coincidentally, this was also the first time any two SpaceX launches had happened back to back from Vandenberg.

As the Atlantic Ocean enters hurricane season, the weather will play a larger role in SpaceX’s ability to keep up the cadence, potentially having to adjust the liftoff time of missions several times to try and find a gap in the weather. However, SpaceX’s Vice President of Falcon Launch Vehicles thinks the company still has a good chance of hitting its goal of flying 148 times this year and potentially even more than that.

Notable missions past and future

SpaceX supported nine customer missions during the second quarter of 2024, once again becoming the commercial launch company with the most customer flights during that period. The nine customer missions between April and June 2024 added to the 11 customer missions performed during the first quarter of the year totals 20 customer missions for 2024.

These nine missions included the first launch of Europe’s Galileo global navigation satellites onboard Falcon 9 as a result of the ongoing delays with the development of Ariane 6. This rocket, while set to debut no earlier than July 9, will probably not be ready to carry these Galileo satellites until at least next year. SpaceX also launched EarthCARE, an Earth observation satellite jointly developed by the European Space Agency (ESA) and the Japan Aerospace Exploration Agency (JAXA).

This satellite also suffered a change of rockets from Soyuz to Vega C and then to Falcon 9 as a result of the ongoing Russian invasion of Ukraine and development struggles with Vega C. Additionally, the latter rocket would have needed a fairing modification to be able to accommodate EarthCARE, which made the change to Falcon 9 much more sensible.

SpaceX also performed the first Bandwagon mission as part of its Smallsat Rideshare Program, bringing 11 rideshare payloads into a mid-inclination low-Earth orbit. The company also carried out the 10th flight of Falcon Heavy lifting the GOES-U satellite into an enhanced geosynchronous transfer orbit for the United States National Oceanic and Atmospheric Administration (NOAA).

Coming up in the next quarter, there are at least another 11 confirmed customer missions on tap for SpaceX’s Falcon family of rockets. Perhaps the most notable one will be the long-awaited Polaris Dawn flight which will carry Jared Isaacman, Scott Poteet, Sarah Gillis, and Anna Menon into a high apogee low-Earth orbit. During this mission, Isaacman and Gillis will perform an extravehicular activity (EVA) from Crew Dragon Resilience, becoming the first commercial EVA and the first to be carried out from a SpaceX Crew Dragon spacecraft.

SpaceX unveiled the EVA suit to be used during this mission earlier this year which sports improved mobility over the regular Crew Dragon suit. It also includes other enhancements such as a heads-up display and a camera incorporated onto the helmet.

This won’t be the only Crew Dragon mission set to take place in the next quarter as SpaceX is expected to fly NASA’s Crew-9 crew rotation mission to the International Space Station (ISS) sometime in August. The company will also support the launch of Northrop Grumman’s NG-21 Cygnus resupply spacecraft to the ISS around that time. This will be further followed later into the quarter by the launch of the company’s CRS-31 Cargo Dragon mission to the orbiting outpost.

SpaceX is also set to launch in this quarter the second pair of WorldView Legion satellites for Maxar, the Turksat 6A communications satellite, the Astranis Block 2 satellite mission, and the two satellites from Space Norway’s Arctic Satellite Broadband Mission Program. The company will also continue with its Smallsat Rideshare Program launching the Transporter-11 mission in July from Vandenberg.

SpaceX is once again expected to take up payloads into orbit from foreign governments. Falcon 9 is set to launch another pair of Galileo global navigation satellites for the European Commission and the GSAT-20 communications satellite for the Indian Space Research Organization (ISRO).

Two yet-to-be-confirmed missions may take place in the next quarter as well. These are the NROL-69 mission for the National Reconnaissance Office and the first operational flight of AST SpaceMobile’s BluBird satellites.

Starlink and Starshield

However, the majority of flights in the second quarter of the year were Starlink missions. SpaceX performed 27 Starlink flights during that period which added to the 20 Starlink missions performed during the first quarter of the year totals 47 Starlink launches in 2024 so far.

These 27 Starlink missions featured the operational deployment of the company’s Starlink Direct to Cell satellite constellation. These missions also feature the first launches of Starlink Groups 8, 9, and 10, as well as the return of northeasterly trajectories for Starlink launches from Florida. SpaceX also has seemingly stopped launching Starlink Group 6 and Starlink Group 7 missions in favor of these new groups that have debuted.

While named differently, Starlink Group 8 and Starlink Group 9 missions appear to be the same with both types of missions launching a set of Starlink v2 Mini and Starlink Direct to Cell satellites to a 53-degree inclination low-Earth orbit. While yet to be confirmed, it could be that the Starlink Direct to Cell satellites launched on each of these groups will be operating at different altitudes which would explain the different group number used.

As for Starlink Group 10 missions, these also appear to be very similar to Starlink Group 7 missions, launching a batch of Starlink v2 Mini satellites into a 53-degree inclination low-Earth orbit. Just like with the previous two Starlink mission groups, it may be that these will eventually operate at a different altitude and therefore need to be grouped into different missions but this is yet to be confirmed.

The second quarter of 2024 also featured two customer missions using SpaceX’s Starshield satellite design, the company’s solution for government satellite applications using the Starlink satellite bus. These two missions were the NROL-146 and NROL-186 missions for the National Reconnaissance Office carrying 42 satellites for the agency’s Proliferated Space Architecture surveillance satellite constellation.

Not much is openly known about this constellation other than SpaceX is the main satellite contractor with Northrop Grumman supplying sensors and other payloads that go on these satellites. The agency says it expects to fly approximately six of these missions in total throughout 2024 with many more expected to take place up until 2028 — although the exact number is not known, it could be in the dozens of missions.

Starlink satellites were once again in the spotlight during Starship’s fourth flight which provided uncut footage of the rocket’s both stages ascent and descent portions during the mission.

Starship

Starship’s fourth flight saw Ship 29 and Booster 11 fully completing their missions from launch to soft splashdown in the water — a first for the Starship program.

Both vehicles completed their ascent burns successfully — despite one engine shutting down during Booster 11’s ascent — and separated nominally with another successful hot-staging separation of ship and booster.

Booster 11 successfully completed its boostback and landing burns softly touching down in the waters of the Gulf of Mexico approximately seven minutes after liftoff. While an engine appeared to have been lost during the landing burn, Super Heavy’s engine-out capability allowed the booster to complete the burn with a precise soft splashdown within the target location.

Ship 29 continued with its nearly-orbital trajectory to the Indian Ocean successfully controlling its attitude through the coast phase in space before reentry. Approximately 45 minutes into the mission, Ship 29 started experiencing atmospheric reentry and successfully survived through the entire plasma phase, demonstrating successful control of its attitude during hypersonic, supersonic, and transonic regimes.

This was not without issues, though, the spacecraft suffered major damage on its starboard forward flap due to plasma seeping through the gap between the flap and the ship’s body. SpaceX’s CEO Elon Musk later confirmed that the other flaps on the ship suffered some damage as well but it was not as severe as the one seen during the broadcast.

Despite this damage, Ship 29 successfully re-ignited its three Raptor sea-level engines and landed softly and vertically in the Indian Ocean, marking the first time the upper stage of an inline rocket had gone through orbital reentry and softly touched down on Earth. Musk later confirmed that the spacecraft touched down a few kilometers off target due to the flap damage.

Building upon the success of this flight, SpaceX is now gearing up for the fifth flight of the world’s most powerful rocket. This will feature Booster 12 and Ship 30 as the pair of vehicles to fly on this mission. SpaceX is aiming to improve upon the experience of Starship’s fourth flight with the first recovery attempt of a Super Heavy booster back on the launch pad and a revamped heat shield for the Starship upper stage that should ensure no damage is incurred during reentry.

The company has already begun working and testing the chopstick arms attached to the Starship launch tower that will serve as the landing pad for Booster 12. This involved a series of impact and alignment tests with a test tank, B14.1, that simulated the top portion of the booster.

Ship 30’s heat shield is in the middle of a process of a major overhaul, with the previously installed tiles being removed and a new set of tiles of newer design being installed instead. Elon Musk claims these new tiles have twice the strength of the older tiles, meaning that they’ll be less susceptible to cracks or break up during flight.

SpaceX teams are also installing a new ablative material underneath the tiles on some portions of the vehicle. This material would act as a backup heat shield in case one of these tiles were to crack, break, or fall off from Ship 30, further ensuring the vehicle’s survivability during its upcoming flight.

While no mishap investigation is required as a result of the success during Starship’s fourth flight, the vehicle’s launch license with the Federal Aviation Administration (FAA) may need a modification to include the landing back at the pad of Booster 12.

During the last quarter, SpaceX also gave several updates on the near and long-term future of the Starship program, including information for an upgraded version of Starship often dubbed as Starship version 2 or Block 2. This version will feature slightly longer Ships and Boosters with more propellant capacity, higher reliability, and higher thrust.

SpaceX has already begun pathfinding hardware for this version at the company’s facilities in Starbase, Texas. Given the observed hardware for Starship version 2, it is expected that Ship version 2 will come first and then later down the line, SpaceX will transition booster production to the new version as well.

It is also believed SpaceX may begin the stacking of the first Ship version 2 in the coming months but this could slip depending on the lessons learned on upcoming flights and during the commissioning of the new tooling. The company is also planning a larger version, dubbed version 3, that will likely extend up to 150 meters in its full stack configuration although it’s believed this will take a few years to materialize.

Along with Starship’s upcoming version, SpaceX is also preparing to start testing an upgraded version of its Raptor engine dubbed Raptor 3. This engine is being designed to have a higher thrust, be more resilient, and have a much more simplified manufacturing which will enable SpaceX to remove from the design the heavy engine shields that are currently present at the base of the rocket, along with removing the existing fire protection system.

This engine is expected to be used on the upgraded versions of Starship which will increase the rocket’s performance and ability to loft heavier payloads into orbit. This past quarter we also got to know through NASA’s Advisory Council that this upgraded version of Starship will enable a ship-to-ship propellant transfer demonstration currently scheduled to take place no earlier than next year.

During the second quarter of 2024 SpaceX also further expanded its Starfactory facility and completely built out a second Mega Bay at Starbase that will be focused on Ship stacking and processing. It also started work on the base of the second launch tower at Starbase and brought to life the new Terex-Demag CC8800-1 crane that will be used for its construction. Based on official documentation, SpaceX is aiming to build up the basic structure of this tower by mid-August.

During this period, the FAA announced its intention to start an Environmental Impact Statement (EIS) for Starship’s launchpad at Launch Complex 39A. While this site already had undergone an Environmental Assessment (EA) back in 2019, SpaceX’s plans for the location have changed with new facilities and a larger and more powerful Starship rocket than originally intended.

The site is set to feature an air separation unit, a liquefaction plant, and a dedicated Starship catch tower separate from the existing launch tower. The agency is already well into its public scoping process and may release a draft EIS later this year with a final EIS expected no earlier than the summer of next year.

[jemhouston]

https://youtube.com/shorts/8OTFPAa8Bw0? ... Oz55lrFXXv

[brovane]

https://youtube.com/shorts/8OTFPAa8Bw0? ... Oz55lrFXXv

That interview was over a year ago.

Right before the IFT-4 launch, the Everyday Astronaut did a interview with Musk. Really gives a good view of how much SpaceX has built over the last several years and moved out of tents into buildings. There is a couple obvious breaks in the video where something happened that was ITAR related and cut. SpaceX had final say on what was shown.

https://youtu.be/aFqjoCbZ4ik?si=Ap53hPPjgK0IA-EB - Part 1

https://youtu.be/InJOlT6WdHc?si=3qNg8SOfdX3W3t2r - Part 2

Integrated IFT-4 video from SpaceX.

https://youtu.be/j2BdNDTlWbo?si=ZNa7dVdAoF0k6AXa

[brovane]

After over 300+ successful launches in a row with the F9, it has suffered a anomaly with it's second stage during a Starlink launch out of Vandenberg. The 2nd stage had a LOX leak that was visible on the camera from the 2nd stage. This resulted in the 2nd stage experiencing a RUD during re-ignition of the 2nd stage to raise it's orbit. This has resulted in the Starlink satellites being placed into a much lower than intended orbit. At this low of orbit there is to much atmospheric drag on the satellites for the onboard thrusters to overcome. We might get lucky and a couple might survive but it seems like most will re-enter fairly quickly. The FAA has ordered a mishap investigation. This will impact the crewed Polaris Dawn mission scheduled for NET July and Crew-9 mission schedule for later in August. Unknown at this point how long the analysis will take as to what caused the failure and how it is to be prevented in future flights. There is a lot of engineers at SpaceX who are going to be working this weekend going over telemetry data and doing a fault tree analysis. The 1st stage did successfully land down-range and was recovered.

The event happens at 33:55. You can see the blanket jolt and inflate.
https://www.youtube.com/live/DVh4cpCNz5 ... OcLfQOHDeE

[brovane]

Interesting article by Eric Berger. Basically SpaceX is blowing away the competition so much that NASA is having difficulty getting bidders on contracts. The ISS de-orbit vehicle, NASA had to change the terms of the contract to include cost-plus or Northrop wouldn't bid. SpaceX wasn't going to bid on a cost-plus contract because it would require a new layer of bureaucracy at SpaceX. So NASA allowed companies to bid either cost-plus or fixed-price.

Notably, the initial draft "request for proposals" for a deorbit mission issued in May 2023 called for a "single-award Hybrid Cost-Plus Incentive Fee and Firm Fixed Price core" contract. However, four months later, in its final request for proposals, NASA said it wanted to maximize competition. Companies, therefore, could propose contracts that were either largely based on cost-plus or fixed-price.

Essentially, Northrop told NASA it would not bid for a firm, fixed-priced contract. And conversely, SpaceX said it would not bid under a cost-plus contracting mechanism, which would require the company to add a new layer of bureaucracy to process such contracts. (SpaceX was also not particularly interested in a one-off mission for Dragon when the company is so focused on Starship development). Sticking to the original contracting mechanism would likely have meant that NASA had just a sole bidder, Northrop, for the deorbit mission.

Then it was a blow-out in SpaceX's favor. NASA want's a robust contractor community to support it's missions. However that isn't occurring when SpaceX out competes other companies by such a wide margin.

SpaceX's bid price was $680 million. The source selection statement did not reveal a price for Northrop's bid other than saying it was "significantly higher." Based on NASA's budget request, Northrop's bid was likely approximately twice as high.

But SpaceX did not just win on price. Its "mission suitability" score, effectively its technical ability to design, develop, and fly a vehicle capable of deorbiting the space station, was 822, compared to Northrop's score of 589. SpaceX's approach had one weakness, compared to seven weaknesses in Northrop's bid, according to NASA evaluators.


https://arstechnica.com/space/2024/07/s ... nts-page=1

[brovane]

SpaceX has returned to flight. The investigation is ongoing but the FAA agreed that there was no public safety issues had been involved in the anomaly.

https://www.nasaspaceflight.com/2024/07 ... ight-2024/

[Rocket J Squrriel]

SpaceX might be launching the first known manned mission into polar orbit.


https://spaceflightnow.com/2024/08/12/s ... ths-poles/

SpaceX to launch privately-financed international crew of four around Earth’s poles
August 12, 2024 William Harwood

A blockchain entrepreneur, a cinematographer, a polar adventurer and a robotics researcher plan to fly around Earth’s poles aboard a SpaceX Crew Dragon capsule by end of year, becoming the first humans to observe the ice caps and extreme polar environments from orbit, SpaceX announced Monday.

The historic flight, launched from the Kennedy Space Center in Florida, will be commanded by Chun Wang, a wealthy bitcoin pioneer who founded f2pool and stakefish, “which are among the largest Bitcoin mining pools and Ethereum staking providers,” the crew’s website says.

“Wang aims to use the mission to highlight the crew’s explorational spirit, bring a sense of wonder and curiosity to the larger public and highlight how technology can help push the boundaries of exploration of Earth and through the mission’s research,” SpaceX said on its web site.

Wang’s crewmates are Norwegian cinematographer Jannicke Mikkelsen, Australian adventurer Eric Philips, and Rabea Rogge, a German robotics researcher. All four have an interest in extreme polar environments and plan to carry out related research and photography from orbit.

The mission, known as “Fram2” in honor of a Norwegian ship used to explore both the Arctic and Antarctic regions, will last three to five days and fly at altitudes between about 265 and 280 miles.

“This looks like a cool & well thought out mission. I wish the @framonauts the best on this epic exploration adventure!” tweeted Jared Isaacman, the billionaire philanthropist who charted the first private SpaceX mission — Inspiration4 — and who plans to blast off on a second flight — Polaris Dawn — later this month.

The commercial flights “showcase what commercial missions can achieve thanks to @SpaceX’s reusability and NASA’s vision with the commercial crew program,” Isaacman said. “All just small steps towards unlocking the last great frontier.”

Like the Inspiration4 mission before them, Wang and his crewmates will fly in a Crew Dragon equipped with a transparent cupula giving them a picture-window view of Earth below and deep space beyond.

No astronauts or cosmonauts have ever viewed Earth from the vantage point of a polar orbit, one tilted, or inclined, 90 degrees to the equator. Such orbits are favored by spy satellites, weather stations and commercial photo-reconnaissance satellites because they fly over the entire planet as it rotates beneath them.

The high-inclination record for a piloted flight was set in 1963 by Russia’s Vostok 6 spacecraft carrying cosmonaut Valentina Tereshkova, the first woman in space. Her spacecraft carried her 65 degrees to either side of the equator over 48 orbits. The U.S. record is shared by four space shuttle missions that flew in orbits inclined 57 degrees to the equator.

The International Space Station never flies beyond 51.6 degrees north and south latitude. NASA planned to launch a space shuttle on a classified military mission around the poles in 1986, but the flight was canceled in the wake of the Challenger disaster.

“The North and South Poles are invisible to astronauts on the International Space Station, as well as to all previous human spaceflight missions except for the Apollo lunar missions but only from far away,” the Fram2 website says. “This new flight trajectory will unlock new possibilities for human spaceflight.”

SpaceX has launched 13 piloted missions carrying 50 astronauts, cosmonauts and private citizens to orbit in nine NASA flights to the space station, three commercial visits to the lab and the Inspiration4 mission chartered by Isaacman.

Isaacman and three crewmates plan to blast off Aug. 26 on another fully commercial flight, this one featuring the first civilian spacewalks. NASA plans to launch its next Crew Dragon flight to the space station around Sept. 24.

[jemhouston]

While I was at JSC, I did the polar orbit sims. They also had the orbits up at the same time.


If I remember correctly, NASA / DOD was planning on showing as much as possible from polar orbit.

[brovane]

CNBC published a recent hit piece on SpaceX and their operations in Texas about the water deluge system polluting the waters around Starbase.

https://www.cnbc.com/2024/08/12/spacex- ... found.html

SpaceX's response on X.
CNBC’s story on Starship’s launch operations in South Texas is factually inaccurate.

Starship’s water-cooled flame deflector system is critical equipment for SpaceX’s launch operations. It ensures flight safety and protects the launch site and surrounding area.

Also known as the deluge system, it applies clean, potable (drinking) water to the engine exhaust during static fire tests and launches to absorb the heat and vibration from the rocket engines firing. Similar equipment has long been used at launch sites across the United States – such as Kennedy Space Center and Cape Canaveral Space Force Stations in Florida, and Vandenberg Space Force Base in California – and across the globe.

SpaceX worked with the Texas Commission of Environmental Quality (TCEQ) throughout the build and test of the water deluge system at Starbase to identify a permit approach. TCEQ personnel were onsite at Starbase to observe the initial tests of the system in July 2023, and TCEQ’s website shows that SpaceX is covered by the Texas Multi-Sector General Permit.

When the EPA issued their Administrative Order in March 2024, it was done without an understanding of basic facts of the deluge system’s operation or acknowledgement that we were operating under the Texas Multi-Sector General Permit.

After we explained our operation to the EPA, they revised their position and allowed us to continue operating, but required us to obtain an Individual Permit from TCEQ, which will also allow us to expand deluge operations to the second pad. We’ve been diligently working on the permit with TCEQ, which was submitted on July 1st, 2024. TCEQ is expected to issue the draft Individual Permit and Agreed Compliance Order this week.

Throughout our ongoing coordination with both TCEQ and the EPA, we have explicitly asked if operation of the deluge system needed to stop and we were informed that operations could continue.

TCEQ and the EPA have allowed continued operations because the deluge system has always complied with common conditions set by an Individual Permit, and causes no harm to the environment. Specifically:

- We only use potable (drinking) water in the system’s operation. At no time during the operation of the deluge system is the potable water used in an industrial process, nor is the water exposed to industrial processes before or during operation of the system.

- The launch pad area is power-washed prior to activating the deluge system, with the power-washed water collected and hauled off.

- The vast majority of the water used in each operation is vaporized by the rocket’s engines.

- We send samples of the soil, air, and water around the pad to an independent, accredited laboratory after every use of the deluge system, which have consistently shown negligible traces of any contaminants. Importantly, while CNBC's story claims there are “very large exceedances of the mercury” as part of the wastewater discharged at the site, all samples to-date have in fact shown either no detectable levels of mercury whatsoever or found in very few cases levels significantly below the limit the EPA maintains for drinking water.

- Retention ponds capture excess water and are specially lined to prevent any mixing with local groundwater. Any water captured in these ponds, including water from rainfall events, is pumped out and hauled off.

- Finally, some water does leave the area of the pad, mostly from water released prior to ignition and after engine shutdown or launch. To give you an idea of how much: a single use of the deluge system results in potable water equivalent to a rainfall of 0.004 inches across the area outside the pad which currently averages around 27 inches of rain per year.

With Starship, we’re revolutionizing humanity’s ability to access space with a fully reusable rocket that plays an integral role in multiple national priorities, including returning humans to the surface of the Moon. SpaceX and its thousands of employees work tirelessly to ensure the United States remains the world’s leader in space, and we remain committed to working with our local and federal partners to be good stewards of the environment.