Tag: engineering

Spire offers way to track ships even when they are trying to hide

12:44 pm

The smallsat company Spire is now offering what it calls its ‘Dark Shipping’ and ‘Spoofing’ Detection” option, using its 100-satellite constellation to track ships even when they are trying to hide.

Spire says the new dark shipping detection solution taps into the company’s constellation of more than 100 satellites to provide near real-time global AIS [Automatic Identification System] message position validation to uncover suspicious activity and pinpoint a vessel without the need for an approximate location.

“For a long time, having the tools to accurately identify and track ships that are attempting to hide their activities or location has been the missing key to preventing sanctions evasion, illegal fishing, human trafficking and many more pressing societal issues,” said Peter Mabson, CEO, Spire Maritime.

Hat tip to Robert Pratt of Pratt on Texas, who emailed me this press release and noted that this was “just one example of how lower launch costs are driving new things most would not guess.”

To me, this is both good and bad. Spire’s tracking capability gets it another way to make money as well as to track illegal activity. It also allows governments another way to track everyone to keep them from doing anything the authorities dislike.

When we had a government that saw itself as the servant to the people, I would not be so worried about the latter. With our present corrupt government, misuse of this information by those in power is now a real concern.

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The Martian cycles of climate change, as shown in just one crater

11:54 am

The Martian cycles of climate change, as shown in one crater

Cool image time! The photo to the right, rotated, cropped, reduced, and enhanced to post here, was taken on September 2, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The science team titled this picture “Gullies with Terminal Ridges on Glacial Crater Fill,” a title that in one phrase encapsulates everything we see here of this unnamed 8-mile-wide crater’s western rim and interior.

The crater is located at 46 degrees south latitude inside the much larger 145-mile-wide Kepler Crater, and about 1,500 miles east of Hellas Basin in a region where a lot of glacial ice is found. A context camera image taken in July 2020 shows the entire crater floor apparently covered with glacial fill that on the edges appears to be eroding away.

Today’s high resolution photo focused on the western part of the crater, where that eroding edge was instead replaced by a meandering ridge reminiscent of a moraine. The gullies on the interior slope to the west, as well as the parallel north-south cracks, suggest that debris falling and sliding down from that rim had pushed up against this glacial ice and created that ridge.

There is a lot more to this geology however.
» Read more

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Several major rocket companies to the FCC: stay out!

8:58 am

In response to the proposal by managers at the Federal Communications Commission (FCC) that it regulate satellite operations despite having no actual legal authority to do so, a cohort of major rocket companies as well as others have responded in firm opposition.

Major space companies, including SpaceX and Relativity, are urging the U.S. Federal Communications Commission (FCC) to stick to its purview — spectrum usage — as it looks to potentially update its rules for in-space servicing, assembly and manufacturing (ISAM) missions.

There is plenty that the FCC could — and should do — to support ISAM missions that sit squarely within its regulatory bounds, the companies said. SpaceX and others, as well as startups like Orbit Fab, which wants to build refueling depots in space, and Starfish Space, which is developing a satellite servicing vehicle, submitted recommendations related to spectrum and ISAM. The commission also heard from Blue Origin, Lockheed Martin, United Launch Alliance and other space companies and industry groups.

…Relativity Space and the industry association Commercial Spaceflight Federation separately argued that the FCC’s involvement in issues outside of those related to spectrum could result in duplicative approvals processes. These could be especially challenging for smaller startups and newer space entrants to navigate.

It is likely that if the FCC tries to impose regulations outside of its legal authority, one or more of these companies are going to sue to nullify those regulations, and will likely win. In the process nothing will be gained, and much lost. Thus, this advice from the industry makes great sense, and the FCC and the Biden administration should stop playing empire-building games and focus on what it is legally supposed to do.

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SLS launch early on November 16th remains uncertain

8:47 am

Despite repeated assurances that the November 16, 2022 1:04 am (Eastern) launch of NASA’s SLS rocket remains on target, managers have also noted that damage to a small piece of caulking at the base of the shroud protecting the Orion capsule remains an issue that could cause a scrub.

But high winds from Nicole caused a thin strip of caulk-like material known as RTV to delaminate and pull away from the base of the Orion crew capsule’s protective nose cone at the top of the rocket. The material is used to fill in a slight indentation where the fairing attaches to the capsule, minimizing aerodynamic heating during ascent. The fairing fits over the Orion capsule and is jettisoned once the rocket is out of the dense lower atmosphere. “It was an area that was about 10 feet in length (on the) windward side where the storm blew through,” said mission manager Mike Sarafin. “It is a very, very thin layer of RTV, it’s about .2 inches or less … in thickness.”

Engineers do not have access for repairs at the pad and must develop “flight rationale,” that is, a justification for flying despite the delaminated RTV, in order to proceed with the launch. Managers want to make sure any additional material that pulls away in flight will not impact and damage downstream components.

In plain language, NASA managers would either have to issue a waiver that says this small piece of caulking poses no risk, or scrub and roll the rocket back to the assembly building to fix it. The second option would delay the launch another month, at a minimum.

A waiver however would continue NASA’s pattern with the shuttle (and continuing with SLS) to dismiss potential engineering problems simply to avoid schedule delays. With the shuttle, this pattern twice caused the loss of a shuttle and crew. With SLS, NASA has already waived by more than a year its rules concerning the stacked life of the rocket’s solid-fueled boosters. Agency managers have also waived the full test requirements from the dress rehearsal countdown, so that this test did not test everything it should.

It is expected that NASA managers will announce the waiver today on this problem. Whether it matters when the rocket goes through maximum dynamic pressure shortly after lift-off will likely determine the future of SLS.

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CAPSTONE successfully enters lunar orbit

10:17 pm

CAPSTONE successfully entered orbit around the Moon today, putting it into the planned Lunar Gateway halo orbit to test operations in that location.

CAPSTONE is now in a near-rectilinear halo orbit, or NRHO. This particular NRHO is the same orbit that will be used by Gateway, the Moon-orbiting space station that will support NASA’s Artemis missions. CAPSTONE is the first spacecraft to fly an NRHO, and the first CubeSat to operate at the Moon.

Mission engineers plan two more engine burns over the next five days to refine the orbit more precisely.

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X-37B returns successfully to Earth after 908 days in orbit

7:13 pm

One of the two X-37B reusable mini-shuttles that Boeing built for the military successfully returned to Earth early this morning after completing 908 days in orbit, a new longevity record.

This was the sixth mission of the crewless reusable plane, built by Boeing and jointly operated by the U.S. Space Force and the Air Force Rapid Capabilities Office. Known as Orbital Test Vehicle 6, it launched to orbit May 17, 2020, on a United Launch Alliance Atlas 5 rocket.

On this mission the X-37B carried several U.S. military and NASA science experiments, including a Naval Research Laboratory project to capture sunlight and convert it into direct current electrical energy, and the U.S. Air Force Academy’s FalconSat-8, which remains in orbit.

It appears, based on the amount of information released after landing, that the Space Force is making more of what it does and will do on this and future X-37B flights more public.

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China launches environmental satellite

7:08 pm

Using its Long March 6 rocket, China early today launched what China’s state-run press claimed was an environmental satellite for “atmospheric and marine environment surveys, space environment surveys, disaster prevention and reduction, and scientific experiments.” Whether that is true is anybody’s guess.

The leaders in the 2022 launch race:

52 SpaceX
50 China
19 Russia
9 Rocket Lab
8 ULA

American private enterprise now leads China 75 to 50 in the national rankings, and trails the rest of the world combined 78 to 75.

FYI, posting is late today because today Diane and I were out hiking, having fun.

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China launches Tianzhou freighter to Tiangong-3 space station

9:32 am

Earlier today China successfully used its Long March 7 rocket to launch the fifth Tianzhou freighter to its Tiangong-3 space station.

At 12:10 p.m., Tianzhou-5 conducted a fast automated rendezvous and docking at the rear docking port of the space station’s core module Tianhe. This is the first time that China’s cargo craft has completed a fast automated rendezvous and docking in about two hours, setting a world record, according to Pan Weizhen, a designer of the cargo craft system from the China Academy of Space Technology.

The leaders in the 2022 launch race:

52 SpaceX
49 China
19 Russia
9 Rocket Lab
8 ULA

American private enterprise now leads China 75 to 49 in the national rankings, and trails the rest of the world combined 77 to 75.

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SpaceX launches two Intelsat communications satellites

9:17 am

Using its Falcon 9 rocket SpaceX today successfully launched two Intelsat geosynchronous communications satellites into orbit.

The first stage completed its 14th flight, but was not recovered. This was not a failure, but intended because the rocket needed the fuel to instead get the satellite into its proper geosynchronous orbit.

The leaders in the 2022 launch race:

52 SpaceX
48 China
19 Russia
9 Rocket Lab
8 ULA

American private enterprise now leads China 75 to 48 in the national rankings, and only trails the rest of the world combined 76 to 75.

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November 11, 2022 Quick space links

4:01 pm

Courtesy of BtB’s stringer Jay.

 

 

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China: We like dumping out-of-control rockets on your head!

3:49 pm

China has now signaled that it intends to ramp up the launch rate of its Long March 5B rocket, its most powerful rocket but also a rocket with a core stage that falls to Earth out-of-control after each launch, risking injury and damage to others.

Liu Bing, director of the general design department at the China Academy of Launch Vehicle Technology (CALT), told Chinese media that the the Long March 5B, designed for launches to low Earth orbit, would be used together with the Yuanzheng upper stage series to launch multiple satellites for constellations.

Though not clearly stated, the launcher and YZ-2 combination could be used to help deliver high numbers of satellites into orbit for the planned national “guowang” satellite internet megaconstellation.

It is very possible that with the addition of an upper stage, engineers could reconfigure the rocket so that the first stage is shut down and separated earlier so that it immediately falls into an ocean drop zone following launch. At the same time, making sure that drop zone is always over the ocean might be difficult for some polar launches.

What China really has to do is to upgrade the engines on the core stage so that they can be restarted. At present these engines can only be started once, and once shut down they are dead. If the stage reaches orbit — which it has done on all previous launches — there is then no way to control it, and since that orbit is unstable the stage crashes to Earth, who knows where, shortly thereafter. With restartable engines the stage could easily be de-orbited properly.

China has expressed utter contempt for the complaints of other nations about these out-of-control crashes, claiming the risk is infinitesimal. While quite small, it still exists.

Ted Muelhaupt of the Aerospace Corporation said in July that the odds of debris from the reentry following the launch of the Wentian module ranged from one in 230 to one in 1,000. This was more than an order of magnitude greater than internationally accepted casualty risk threshold for the uncontrolled reentry of rockets of one in 10,000, stated in a 2019 report issued by the U.S. Government Orbital Debris Mitigation Standard Practices.

Small or not, China is a signatory to the Outer Space Treaty, and every out-of-control crash has been a violation of that treaty. This behavior clearly makes China a rogue nation, not to be trusted.

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Advanced Space wins lunar orbiter contract with Air Force

9:21 am

Advanced Space, the company that is presently running the CAPSTONE mission that will arrive in lunar orbit on November 13th, has won a $72 million contract with the Air Force Research Laboratory to build and operate a new experimental lunar orbiter.

The mission, dubbed Oracle, is targeting a 2025 launch and will operate in lunar orbit for two years.

“Our primary goals for the program are to advance techniques to detect previously unknown objects through search and discovery, to detect small or distant objects, and to study spacecraft positioning and navigation in the XGEO realm,” said James Frith, the principal investigator. XGEO refers to the space beyond geosynchronous orbit out to the moon. Oracle will operate in the vicinity of Earth-moon Lagrange Point 1, about 200,000 miles from Earth. The GEO belt, by comparison, is about 22,000 miles above Earth.

An additional goal of Oracle is to help mature AFRL’s green propellant technology. “While there are no specific plans yet to refuel Oracle, AFRL wants to encourage civil and commercial development of on-orbit refueling services,” said Frith.

The federal government’s transition from the building rockets, spacecraft, and satellites to simply buying them from the private sector continues. In the past, when the Air Force attempted to design and build everything, a project like this would have cost at least five times more and taken two to five times longer to get launched. Now, it hires Advanced Space to do it, and gets what it wants quickly for lower cost.

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