词条 | Phootprint |
释义 |
| name = Phootprint | names_list = Phobos Sample Return Mission | image = | image_caption = | image_alt = | image_size = | mission_type = Technology demonstrattor, sample return | operator = European Space Agency | COSPAR_ID = | SATCAT = | website = | mission_duration = 3.5 years (planned)[1] | distance_travelled = | orbits_completed = | suborbital_range = | suborbital_apogee = | spacecraft = | spacecraft_type = | spacecraft_bus = | manufacturer = Airbus Defense and Space | launch_mass = {{convert|4200|kg|abbr=on}}[1] | BOL_mass = | landing_mass = | dry_mass = | payload_mass = | dimensions = | power = | launch_date = 2024 (proposed) | launch_rocket = Ariane 5 | launch_site = Guiana Space Centre | launch_contractor = | deployment_from = | deployment_date = | entered_service = | disposal_type = Re-entry capsule | last_contact = | landing_date = ~2027 | landing_site =
Phootprint is a proposed sample-return mission to the Mars moon Phobos by the European Space Agency (ESA), proposed to be launched in 2024. Overview and statusThe Phootprint mission is a candidate for the Mars Robotic Exploration Preparation Programme 2 (MREP-2) at ESA.[1] During 2014, ESA funded a pre-phase A feasibility study and industrial system studies of 8-month duration.[1][2] Currently, it is in phase A, meaning 'mission definition study.' The mission is proposed to be launched on an Ariane 5 in 2024 with early 2026 as backup date.[1] An Earth swingby would provide greater launcher margin.[1] The spacecraft would orbit Mars for the characterisation phase,[1][3] and when ready, it would maneuver into a quasi-satellite orbit to facilitate landing.[1] Because of the low gravity, the lander would be anchored to the surface during sample collection and launch of the Earth Re-entry Capsule (ERC). The mission would last about 3.5 years, including cruise, mapping orbit, 7 days on the surface, and sample return cruise time.[1] The spacecraft would be powered by solar arrays. In August 2015, the ESA-Roscosmos working group on post-ExoMars cooperation, completed a joint study for a possible future Phobos Sample Return mission, and preliminary discussions were held.[4][5] ObjectivesThe top-level science goal is to understand the formation of the Martian moons Phobos and Deimos and put constraints on the evolution of the Solar System (co-formation, capture, impact ejecta).[1] The mission objectives are:[1]
Mission engineers remark that "no rebound" after landing is a critical condition given the low-gravity environment of landing.[16] Currently, engineers at ESA are leaning toward four cantilever-type landing legs with crushable aluminium honeycomb shock absorber and secondary load limiters.[1] SpacecraftThe concept of the Phootprint spacecraft is still preliminary and composed by three modules:[6]
Proposed payloadAs of 2014, the conceptual 30 kg (66.1 lb) payload is:[3]
Mission architectureThe proposed mission architecture is:[7]
See also
References1. ^1 2 3 4 5 6 7 8 9 10 11 12 {{cite conference |last=Barraclough |first=Simon |last2=Ratcliffe |first2=Andrew |last3=Buchwald |first3=Robert |last4=Scheer |first4=Heloise |last5=Chapuy |first5=Marc | last6=Garland |first6=Martin |title=Phootprint: A European Phobos Sample Return Mission |url=http://solarsystem.nasa.gov/docs/03_Phootprint_A%20European%20Phobos%20Sample%20Return%20Mission_Ratcliffe.pdf |format=PDF |conference=11th International Planetary Probe Workshop |publisher=Airbus Defense and Space |date=June 16, 2014}} {{ESA projects}}{{Mars spacecraft}}2. ^Supporting the Mars Robotic Exploration Preparation Programme. ESA. 4 July 2015. 3. ^1 {{cite web |bibcode=2014cosp...40E1592K |title=Phootprint - A Phobos sample return mission study |last=Koschny |first=Detlef |last2=Svedhem |first2=Håkan |first3=Denis |last3=Rebuffat |work=ESA |date= August 2, 2014 |accessdate=2015-12-22 }} 4. ^{{cite news |url=http://www.esa.int/About_Us/Exhibitions/ESA_at_MAKS_2015 |title=ESA at MAKS 2015 |work=European Space Agency |location=Zhukovsky, Russia |publisher=ESA |date= |accessdate=2015-12-22 }} 5. ^{{cite news |last=Kane |first=Van |url=http://www.planetary.org/blogs/guest-blogs/van-kane/20140609-a-checkup-on-future-mars-missions.html |title=A Checkup on Future Mars Missions |work=The Planetary Society |date=9 June 2014 |accessdate=2015-12-22 }} 6. ^1 {{cite conference |last=Chitu |first=Cristian Corneliu |last2=Stefanescu |first2=Raluca |last3=Bajanaru |first3=Paul |last4=Galipienzo |first4=Julio| last5=Rybus |first5=Tomasz | last6=Seweryn |first6=Karol | last7=Visentin |first7=Gianfranco | last8=Ortega |first8=Cristina| last9=Barciński |first9=Tomasz |title=Design and Development of an Active Landing Gear System for Robotically Enhanced Surface Touchdown |url=http://robotics.estec.esa.int/ASTRA/Astra2015/Papers/Session%209A/98865_Chitu.pdf |format=PDF |conference=European Space Research and Technology Centre |publisher=European Space Agency |year=2014 }} 7. ^ "Sample Return Missions Requirementsfor Earth Reentry Capsules TPS". D. Rebuffat. ESA. 5 : European Space Agency space probes|Proposed space probes|Missions to Mars|Phobos (moon)|Sample return missions |
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