Tag: NASA

NASA engineers have decided to go ahead with a series of spacewalks to repair the ISS cooling system, thereby delaying the Cygnus cargo mission until January.

3:12 pm

NASA engineers have decided to go ahead with a series of spacewalks to repair the ISS cooling system, thereby delaying the Cygnus cargo mission until January.

The EVAs will take place on December 21, 23 and 25 followed by a Russian Spacewalk on the 27th and a Beta-Angle Cut-out beginning on December 29. That means that the earliest launch opportunity for Cygnus is January 9, 2014 (local time) – pending the successful execution of the contingency EVAs.

Update: The Orbital Sciences press announcement says their launch can happen no earlier than January 13.

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If a US spacewalk on ISS is necessary to repair its cooling system, the spare parts are there, but the spacesuits are not.

8:35 am

If a US spacewalk on ISS is necessary to repair its cooling system, the spare parts are there, but the spacesuits are not.

Prior to retiring the shuttle NASA, aware that cargo supply would be limited once the shuttle was gone, shipped up to the station as many spare parts as possible. Thus, there are three spare pump modules on ISS that could be installed during a spacewalk to replace the module that has the valve problem.

However, because of the water leak problem that occurred in one American spacesuit during a July spacewalk, NASA has halted all American spacewalks until replacement suits can be shipped up to the station.

Since then, NASA has been conducting extensive investigations into the water leak issue, with… “the crew performed a series of tests on EMU 3011 [the faulty spacesuit] as part of an ongoing effort for returning the suit back to service. The tests included water leak checks, communication checks, and suit pressure leak checks. EMU 3011 passed all tests.”

However, NASA had been planning to wait to return another EMU, serial number 3015, to Earth aboard a SpaceX Dragon vehicle and deliver a new EMU in its place before clearing EVAs to resume. However the next Dragon vehicle is not scheduled to arrive at the ISS until at least late February next year.

The Russians might be able to do this spacewalk, but they are going to demand payment for the work. And they won’t come cheap, considering the circumstances.

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Here’s another report on the planetary sciences/NASA dispute this week over funding and grant scheduling.

11:08 pm

Here’s another report on the planetary sciences/NASA dispute this week over funding and grant scheduling.

From this report it appears that the complaints by the planetary science community might have been a bit overstated. It doesn’t appear that NASA is cutting the planetary sciences grant program in any significant way.

I suspect that the reason the planetary scientists are so touchy is because they do not trust the Obama administration, based on its previous efforts to eliminate the planetary program entirely. (It is also possible that they are right.)

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The planetary science community is in an uproar over the Obama administration’s proposed restructuring and possible budget cuts to NASA’s planetary research program.

11:41 pm

The planetary science community is in an uproar over the Obama administration’s proposed restructuring and possible budget cuts to NASA’s planetary research program.

Though the Obama administration has been consistently hostile to the planetary program, attempting to cut it severely several years in a row, and though I generally have found these particular cuts to be short-sighted, in this case the article is not very clear about the cuts NASA is proposing. It appears they are going to eliminate for one year the general research fund. I suspect there is waste in this budget, but I also suspect that this is a meat cleaver approach that has not been thought out well, as suggested in the article.

One quote from the article reinforces the foolishness of these management decisions:

Next year, a high-level NASA review is likely to have to decide between shutting down either the Mars Curiosity rover or the Cassini mission to Saturn. Both are successful missions that cost around $60 million a year, a level that Green has said the division simply cannot afford for the long term.

Talk about penny wise, pound foolish. The cost to get these probes to their destination was in the billion dollar range, each. To shut them down when they are working and cost relatively so little now is beyond stupid.

As I have written repeatedly, we have a big federal deficit. We need to cut, and I think NASA’s budget can be cut. It just makes no sense to cut planetary research, when there are other portions of that budget that are accomplishing little and cost far more.

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On Tuesday NASA issued a solicitation for bids on providing the agency a manned ferrying capability to and from ISS.

8:38 am

On Tuesday NASA issued a solicitation for bids on providing the agency a manned ferrying capability to and from ISS.

The new solicitation asks for proposals for final design, development, test, evaluation and certification of a human space transportation system, including ground operations, launch, orbital operations, return to Earth and landing.

The article is unclear how this solicitation fits in with the commercial crew program that already exists and is funding the manned upgrade of SpaceX’s Dragon and the development of Boeing’s CST-100 and Sierra Nevada’s Dream Chaser.

Update: This article makes things much clearer, outlining how this solicitation is the next phase in development and is open to all bidders.

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To save money, NASA management has shut down a troubled program to build a more efficient plutonium power supply for its deep space missions.

9:06 am

To save money, NASA management has shut down a troubled program to build a more efficient plutonium power supply for its deep space missions.

The cancelled ASRGs would have generated electrical power from the expansion of gas warmed by the radioactive decay of plutonium-238. NASA says that the devices have the same power output as its current generation of Multi-Mission Radioactive Thermoelectric Generators (MMRTG) but use four times less plutonium-238, a scarce resource. One MMRTG with 4.8 kilograms of plutonium is currently powering the Curiosity rover on Mars.

The United States has less than 40 kilograms of plutonium-238 left, but the DOE restarted production this year. Green says he is confident that the DOE will be producing plutonium-238 at a rate of 1.5 kilograms per year by 2019. He says that the stockpiled plutonium-238, along with the new supply, will be enough to send another planned rover to Mars in 2020 and to complete other missions in the 2020s – without any need for the extra efficiency of the ASRGs.

The ASRG program had been a year and a half behind schedule and had had its management team replaced at one point.

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