| 词条 | PROBA-3 |
| 释义 |
| name = PROBA-3 | image = | image_caption = | image_alt = | image_size = | mission_type = Solar observatory technology demonstrator | operator = ESA | COSPAR_ID = | SATCAT = | website = {{url|http://www.esa.int/Our_Activities/Space_Engineering_Technology/Proba_Missions/About_Proba-3|link}} | mission_duration = 2 years (nominal) | manufacturer = SENER/QinetiQ/EADS CASA/GMV/SPACEBEL | launch_mass = CSC: {{convert|339|kg|lb}} OSC: {{convert|211|kg|lb}} | dry_mass = CSC: {{convert|327|kg|lb}} OSC: {{convert|190|kg|lb}} | payload_mass = | dimensions = CSC: {{convert|1.1|x|1.8|x|1.7|m|ft}} OSC: {{convert|0.9|x|1.4|m|ft}} | power = | launch_date = 2020 | launch_rocket = Vega | launch_site = Kourou ELV | launch_contractor = Arianespace | orbit_reference = Geocentric | orbit_regime = Highly-elliptical Earth Orbit | orbit_semimajor = {{convert|36943|km|mi}} | orbit_eccentricity = 0.8111 | orbit_periapsis = {{convert|600|km|mi}} | orbit_apoapsis = {{convert|60530|km|mi}} | orbit_inclination = 59 degrees | orbit_period = 1178 minutes | orbit_RAAN = 84 degrees | orbit_arg_periapsis = 188 degrees | orbit_epoch = planned | apsis = gee | instrument_type = interferometer | telescope_name = ASPIICS | telescope_type = Fabry–Pérot interferometer | telescope_diameter = {{convert|50|mm|in}} | telescope_focal_length= {{convert|1.15|m|ft}} | telescope_area = | telescope_wavelength = visible light | telescope_resolution = | instruments = | programme = PROBA-series | previous_mission = PROBA-V | next_mission = }} PROBA-3 is the third satellite mission in the European Space Agency's series of PROBA low-cost satellites that are being used to validate new spacecraft technologies while also carrying scientific instruments. OverviewPROBA-3 will be composed of two independent, three-axis stabilized spacecraft flying at 150 meters to one another with the ability to accurately control the attitude and separation of the two craft. Their alignment with the Sun will be maintained for 6 hours, creating ″artificial solar eclipse″ for the back satellite. The spacecraft pair will fly a highly elliptical orbit divided between periods of accurate formation flying around apogee, when payload operations will be possible, and periods of free flight. The length of the formation control period will be a trade-off involving the increasing amount of fuel needed to maintain the orbits in formation when away from apogee.[1] The primary mission of PROBA-3 is solar coronagraphy by using the telescope on the larger of the two satellites to view the Sun's corona while the other spacecraft is maneuvered to accurately occult the disc of the Sun.[2] As of 2017 PROBA-3 is scheduled to be launched in {{Date|2020}}.[3][4] The mission was planned to have a lifetime of around two years. See also
References1. ^{{cite web|url=http://www.esa.int/Our_Activities/Space_Engineering_Technology/Proba_Missions/Mission2|title=Mission / PROBA-3|publisher=ESA|date=13 November 2014|accessdate=30 November 2015}} 2. ^{{cite web|url=http://www.esa.int/Our_Activities/Space_Engineering_Technology/Proba_Missions/Science_payload|title=Science Payload / PROBA-3|publisher=ESA|date=13 November 2014|accessdate=30 November 2015}} 3. ^{{cite web|url=http://www.esa.int/About_Us/ESA_Publications/ESA_Publications_Bulletin/ESA_Bulletin_160_Nov_2014|title=ESA Bulletin 160 (November 2014)|format=PDF|page=61|issn=0376-4265|publisher=ESA|date=November 2014|accessdate=30 November 2015}} 4. ^{{cite web|url=http://www.esa.int/Our_Activities/Space_Engineering_Technology/Proba_Missions/About_Proba-3|title=About PROBA-3|publisher=ESA|date=13 November 2014|accessdate=30 November 2015}} External links
5 : European Space Agency satellites|Proposed satellites|2020 in spaceflight|Solar space observatories|Technology demonstrations |
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