164:(RPA) that can be open or shut depending on the conditions. When closed ions must pass through the RPA before reaching the inner detectors. Beyond the orbit of Jupiter, it was not necessary to have the RPA engaged for measurements to protect the sensors from being overloaded. The RPA can protect the sensors from being overloaded by solar wind intensities that are too strong, as the device is also required to measure much fainter solar wind fluxes at 33 AU from Sun where Pluto would be at the time of the flyby, and even beyond. SWAP can detect ions up to 6.5
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McComas, D.; Allegrini, F.; Bagenal, F.; Casey, P.; Delamere, P.; Demkee, D.; Dunn, G.; Elliott, H.; Hanley, J.; Johnson, K.; Langle, J.; Miller, G.; Pope, S.; Reno, M.; Rodriguez, B.; Schwadron, N.; Valek, P.; Weidner, S. (2008). "The Solar Wind Around Pluto (SWAP) Instrument Aboard New
Horizons".
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Starting in 2012, while the rest of the spacecraft was in hibernation most of the time, SWAP was turned on to collect data about the Solar wind as it journeyed out to Pluto at 33 AU. SWAP recorded data about solar wind in the outer solar system and beyond Pluto, and some of the data that is sought
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might alter the flow solar wind around the dwarf planet. The atmosphere was known to be very tenuous compared to Earth, and one of the questions was how the gases were interacting with the solar wind and sunlight, likewise weaker at Pluto's orbit than at Earth's. One of the ideas was that Pluto's
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Earlier in the mission SWAP was intended to observe the Solar Wind around
Jupiter. SWAP was also designed to be used in conjunction with PEPPSI and REX, to study how the solar wind changes with greater distance from the Sun. SWAP took only limited observations before 2012, but after that took a
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The atmosphere of Pluto was discovered in 1988, but it remained enigmatic and it was hard to understand an atmosphere existing in such low temperatures (45 K, −230 °C, −380 °F). One of the ideas about Pluto is atmospheric loss, with Pluto being compared to losses from
651:
Bagenal, F.; Horányi, M.; McComas, D. J.; McNutt, R. L.; Elliott, H. A.; Hill, M. E.; Brown, L. E.; Delamere, P. A.; Kollmann, P. (2016-03-18). "Pluto's interaction with its space environment: Solar wind, energetic particles, and dust".
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around an obstacle (at the distance of about 4.5 Pluto radii from the surface). One of the areas of investigation is the relationship between high altitude atmospheric loss and the solar wind. After the July 2015 flyby of Pluto by
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SWAP is designed to be able to detect the sparse solar wind concentration at 32 AU, which is about three orders of magnitude less than near Earth (1 AU). However, at that distance the flow of the Solar Wind is still
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One of the observations made with SWAP was that the cross-section of the Pluto's interaction region was limited to about six Pluto radii (about 7000 kilometers); this was smaller than expected.
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McComas, D. J.; Elliott, H. A.; Weidner, S.; Valek, P.; Zirnstein, E. J.; Bagenal, F.; Delamere, P. A.; Ebert, R. W.; Funsten, H. O. (May 2016).
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Overall swap is designed to study the solar wind, including at the distant of 32 AU, and to study atmospheric loss from the atmosphere of Pluto.
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en route, at, and beyond Pluto. At Pluto, SWAP's purpose was to record the relationship between the solarwind and
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SWAP weighs 3.3 kilograms (7.3 pounds) and uses an average of 2.3 watts of spacecraft electrical power.
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Elliott, H. A.; McComas, D. J.; Valek, P.; Nicolaou, G.; Weidner, S.; Livadiotis, G. (2016-04-06).
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Elliott, H. A.; McComas, D. J.; Valek, P.; Nicolaou, G.; Weidner, S.; Livadiotis, G. (2016).
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Elliott, H. A.; McComas, D. J.; Valek, P.; Nicolaou, G.; Weidner, S.; Livadiotis, G. (2016).
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about the solar wind are the proton density, speed, and temperature.
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have collected extensive data about the solar wind beyond 10 AU,
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atmosphere would be stripped away by the solar wind over time.
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Cape
Canaveral Air Force Station Space Launch Complex 41
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space probe, which was designed to fly by dwarf planet
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409:(March 25, 2016) - Sky & Telescope Magazine
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162:Retarding Potential Analyzer
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129:greater amount of data.
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1208:University of Colorado
724:New Horizons - Payload
158:electrostatic analyzer
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842:New Frontiers program
306:Space Science Reviews
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1368:Pluto Kuiper Express
828:Exploration of Pluto
509:10.1002/2016ja022599
1203:Stanford University
676:2016Sci...351.9045B
592:2016ApJS..223...19E
500:2016JGRA..121.4232M
448:2016ApJS..223...19E
392:Sky & Telescope
367:Sky & Telescope
328:2008SSRv..140..261M
251:2016ApJS..223...19E
198:(instrument on the
50:atmosphere of Pluto
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771:2018-10-21 at the
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166:kiloelectron volts
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1166:Institutions
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890:Observations
835:New Horizons
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810:New Horizons
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764:New Horizons
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743:. Retrieved
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69:of escaping
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22:New Horizons
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1355:Kuiper belt
1328:launch site
1308:upper stage
1254:Cathy Olkin
1092:Instruments
935:28978 Ixion
930:15810 Arawn
1398:Categories
1274:Hal Weaver
1269:Alan Stern
1139:Subsystems
1084:Spacecraft
866:132524 APL
745:2018-10-21
667:1605.00749
637:2018-10-21
583:1601.07156
439:1601.07156
373:2018-12-20
242:1601.07156
207:References
152:spacecraft
123:plutopause
110:supersonic
96:Pioneer 11
90:Pioneer 10
56:Background
42:Solar Wind
1318:3rd stage
1287:Logistics
1249:Brian May
1239:Marc Buie
1159:Personnel
708:206645546
692:1095-9203
610:0067-0049
576:(2): 19.
518:2169-9380
432:(2): 19.
319:0709.4505
269:1538-4365
235:(2): 19.
114:bow shock
84:Voyager 2
1385:Category
1314:Star 48B
1146:GPHS-RTG
1012:Rejected
955:Makemake
833:List of
823:Timeline
769:Archived
700:26989259
618:30891065
466:30891065
344:17093908
277:30891065
178:See also
103:Overview
1343:Related
1304:Centaur
1294:Atlas V
1056:2014 PN
1044:2014 OS
1032:2014 MT
1020:2011 HM
997:2012 HE
919:2011 KW
907:2011 JY
897:Neptune
871:Jupiter
852:Targets
672:Bibcode
654:Science
588:Bibcode
496:Bibcode
444:Bibcode
324:Bibcode
247:Bibcode
168:(keV).
1217:People
1193:KinetX
1110:PEPSSI
945:Haumea
940:Quaoar
901:Triton
859:Flybys
837:topics
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616:
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464:
342:
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140:Design
93:, and
63:comets
1115:Ralph
1100:Alice
876:Pluto
704:S2CID
662:arXiv
614:S2CID
578:arXiv
538:(PDF)
462:S2CID
434:arXiv
340:S2CID
314:arXiv
273:S2CID
237:arXiv
196:SWEAP
184:MAVEN
38:Pluto
1130:SWAP
950:Eris
899:and
696:PMID
688:ISSN
606:ISSN
514:ISSN
265:ISSN
46:ions
28:SWAP
1120:REX
1047:393
1023:102
988:394
680:doi
658:351
596:doi
574:223
504:doi
492:121
452:doi
430:223
332:doi
310:140
255:doi
233:223
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546:^
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