Autor Wątek: VIPER - Volatiles Investigating Polar Exploration Rover  (Przeczytany 2706 razy)

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Offline Orionid

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Odp: VIPER - Volatiles Investigating Polar Exploration Rover
« Odpowiedź #15 dnia: Maj 25, 2021, 04:28 »
Kasacji nie ma, ale patrząc na część raportu GAO  dotyczącego misji , można się zastanawiać nad możliwością dotrzymania startu w 2023.

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The Volatiles Investigating Polar Exploration Rover (VIPER) will be a rover that aims to understand how much water is on the moon and where it is located, among other things. The VIPER project plans to use the rover’s three spectrometers and a 1-meter drill with temperature sensors to accomplish these goals. NASA plans for the scientific data that VIPER collects to inform the first global water resources map of the moon and to inform Artemis III lunar landing site decisions. The VIPER project is continuing to advance development of the rover started under the canceled Resource Prospector project, which was planned as a shorter mission to excavate volatiles such as hydrogen, oxygen, and water from the moon.

VIPER project officials told us that the project has a preliminary life cycle cost of $378.5 million as of the preliminary design review. However, project officials said this estimate does not include the cost to transport VIPER to the lunar surface or development work completed under a prior project. It also does not include any potential headquarters-held cost reserves that NASA may add in the future.

NASA awarded a contract to Astrobotic—a Commercial Lunar Payload Services (CLPS) provider—to provide end-to-end commercial payload services, which will require both a lander and the launch vehicle for VIPER, between Earth and the lunar surface. The VIPER project faces a risk that it may have to redesign its rover if Astrobotic's lander cannot accommodate the rover as designed, which could result in cost overruns or schedule delays. Officials said it will become more difficult for the VIPER project to accommodate design changes after critical design review, which is planned for October 2021.


Cost and Schedule Status

Project officials told us that the project has a preliminary life cycle cost of $378.5 million as of the preliminary design review, but the estimate was not documented at a key decision point B review. NASA's project management guidance does not require this review for research and technology projects. According to officials, this preliminary estimate does not include the following: $90.6 million in funding used for prior development work under the Resource Prospector project, any headquarters-held cost reserves that may be added in the future, and the costs for VIPER's landing and launch vehicles. Project officials stated that the prior development work costs are not included because the scope of the project has significantly changed from what was planned for Resource Prospector. In addition, the estimate does not include funding provided through CLPS, which is a partnership between NASA and the U.S. commercial space industry. In June 2020, NASA awarded a contract valued at $199.5 million to Astrobotic—a CLPS provider—to provide end-toend commercial payload services between Earth and the lunar surface that will deliver VIPER to the moon's South Pole in late 2023. According to project officials, the mission directorate is accounting for these costs under CLPS.

According to officials, the project experienced schedule delays and cost effects due to COVID-19. The delays have not yet affected the project’s overall schedule, but the project has experienced $10 million in cost effects. The schedule delays are due to COVID-19-related supply chain disruptions, which delayed deliveries of VIPER flight and engineering development unit cameras and command and data handling hardware. Project officials said that the cost effects stem from higher labor costs across the aerospace industry and due to NASA facility closures limiting the number of employees able to work onsite at a given time.

Design

The project is tracking a risk that it may have to redesign its rover if Astrobotic’s lander cannot accommodate the rover as designed, which could result in cost overruns or schedule delays. Astrobotic is maturing its lander design independently from NASA maturing its VIPER rover design. Project officials said there are technical and programmatic challenges inherent in integrating the two different systems to execute a single mission. Officials said they will work with Astrobotic and the Science Mission Directorate to address this risk as the project continues to mature its design, but it will become more difficult to accommodate design changes after critical design review, planned for October 2021. The project is surveying its current rover design in preparation for the possibility of design changes.

The VIPER project is also tracking a mass growth risk as it balances CLPS mass constraints with changes in mission requirements from Resource Prospector to VIPER. VIPER's requirements include ensuring the rover can survive a 100-plus-day mission and a lunar night, which according to project officials, will require a bigger battery system and chassis than what the project planned under Resource Prospector. There is a possibility that design changes driven by Astrobotic's lander design could result in future mass growth and schedule delays to accommodate redesigns. The VIPER project is currently pursuing mass reduction efforts.

Technology

The VIPER project matured its four critical technologies— which are the rover’s instruments—to technology readiness level 6 by its preliminary design review in August 2020. Our best practices work has shown that maturing technologies by this review can minimize risks for the systems entering product development. Project officials noted that they would mature these technologies to technology readiness level 9 by launch because the instruments will fly on other missions to the lunar surface before VIPER’s launch.

PROJECT OFFICE COMMENTS

VIPER project officials provided technical comments on a draft of this assessment, which were incorporated as appropriate.
https://www.gao.gov/assets/gao-21-306.pdf
« Ostatnia zmiana: Maj 25, 2021, 04:40 wysłana przez Orionid »

Offline Orionid

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Odp: VIPER - Volatiles Investigating Polar Exploration Rover
« Odpowiedź #16 dnia: Maj 25, 2021, 04:54 »
Niektóre instrumenty łazika zostaną wcześniej przetestowane na Księżycu.

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Slated to arrive via Astrobotic's first flight, MSolo, NVSS and NIRVSS are among the payloads that will land on the lunar surface on one of the first CLPS deliveries to the Moon. Versions of TRIDENT and MSolo will ride to the Moon in late 2022 aboard the Polar Resources Ice Mining Experiment (PRIME-1) technology demonstration, delivered by Intuitive Machines on its second CLPS flight.
https://www.nasa.gov/feature/nasa-rover-to-search-for-water-other-resources-on-moon

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Odp: VIPER - Volatiles Investigating Polar Exploration Rover
« Odpowiedź #17 dnia: Maj 25, 2021, 07:38 »
Oj, z tymi prywatnymi misjami-lądownikami to może być tak samo jak z tym Beresheet-1. Nie mówię, że nie daję im kompletnie szans na udane lądowanie, ale szanse powodzenia imho są na poziomie 20% at best. Kompletny brak doświadczenia z jednej strony, prywatna inicjatywa z drugiej, to nie brzmi za dobrze aby tak różowo rysować program testów instrumentów Viper'a.
Rogozin zapowiedział budowę bazy wojskowej na Mimasie, potem - jak starczy rubli - ewentualnie na Charonie.

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Odp: VIPER - Volatiles Investigating Polar Exploration Rover
« Odpowiedź #17 dnia: Maj 25, 2021, 07:38 »