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region. The Kuiper belt is a ring of orbiting bodies between approximately 30 to 55 AU (Earth-Sun distances), home to Pluto and short-period comets it is estimated to consist of hundreds of thousand if not millions of small icy objects. The belt was discovered in 1992, and can be studied more closely
87:
To accomplish the goals, as the spacecraft passed by Pluto, it was placed on a path that took it behind the dwarf planet in relation to the Earth, where radio signals from the flyby spacecraft passed through its atmosphere allowing various properties to be determined. REX also took measurements of
297:
Linscott, I.; Hinson, D. P.; Bird, M. K.; Stern, A.; Weaver, H. A.; Olkin, C.; Young, L. A.; Ennico Smith, K. (2015). "The New
Horizons Radio Science Experiment: Performance and Measurements of Pluto's Atmospheric Structure, Surface Pressure, and Surface Temperature".
519:
Bagenal, F.; Delamere, P. A.; Elliott, H. A.; Hill, M. E.; Lisse, C. M.; McComas, D. J.; McNutt Jr, R. L.; Richardson, J. D.; Smith, C. W.; Strobel, D. F. (2015). "Solar wind at 33 AU: Setting bounds on the Pluto interaction for New
Horizons".
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the atmospheric conditions at Pluto's moon Charon as part of the mission. REX uses an ultrastable oscillator, various electronics, and radio hardware aboard the New
Horizons spacecraft. REX uses the X-band radio uplink on the spacecraft.
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REX hardware weighs 160g (0.16 kg) and consumes 1.6 watts of spacecraft electrical power. It also makes use of other NH hardware, overall key hardware components for REX include:
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flyby. REX is being used to take thermal measurements of the Kuiper belt body during the flyby. REX is also used to study the amount of electrons in outer space in the
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During the post Pluto cruise, REX is normally turned on monthly to measure the electron density of the solar wind between Earth and the spacecraft. When
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The timing of the
Arrokoth flyby was adjusted in part to aid the use of the REX experiment, so that more radar dishes on Earth could be used.
399:
Stern, S. A.; Weaver, H. A.; Spencer, J. R.; Elliott, H. A.; the New
Horizons Team (2018). "The New Horizons Kuiper Belt Extended Mission".
325:
DeBoy, C. C.; Haskins, C. B.; Brown, T. A.; Schluze, R. C.; Bernacik, M. A.; Jensen, J. R.; Millard, W.; Duven, D.; Hills, S. (March 2004).
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Tyler, G. L.; Linscott, I. R.; Bird, M. K.; Hinson, D. P.; Strobel, D. F.; Pätzold, M.; Summers, M. E.; Sivaramakrishnan, K. (2008-02-21).
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27:, which enables the REX experiment to utilize the occultation of Pluto between the spacecraft and Earth to determine atmospheric data
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flew by Pluto in 2015, it was at about 32.9 AU from the Sun, and about 43.6 AU for the New Year's Day 2019 flyby of
Arrokoth.
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43:. REX picks up the signal from Earth during the flyby to record some types of data about the Plutonian system.
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Nimmo, Francis; et al. (2017). "Mean radius and shape of Pluto and Charon from New
Horizons images".
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Experiment was designed with several goals including determination of pressure and temperature of
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477:"The PI's Perspective: Why Didn't Voyager Explore the Kuiper Belt? – Pluto New Horizons"
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Linscott, I. R.; Bird, M. K.; Hinson, D. P.; Pätzold, M.; Tyler, G. L. (2011).
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Using REX radio occultation data the diameter of Pluto was found to be
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by the New
Horizons mission which passed through it in the late 2010s.
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The RF telecommunications system for the New
Horizons mission to Pluto
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Part of the radio network on Earth, a 70 m antenna at
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Cape
Canaveral Air Force Station Space Launch Complex 41
598:"New Horizons prepares for encounter with 2014 MU69"
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To take the measurements, REX communicates with the
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16:NASA Pluto space probe radio experiment (2015)
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148:s post Pluto extended mission, including the
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120:temperature profiles of Pluto's atmosphere
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207:Jupiter orbiter that uses radio and time)
60:space probe to measure properties of the
522:Journal of Geophysical Research: Planets
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123:pressure profiles of Pluto's atmosphere
457:Solar System Exploration: NASA Science
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1030:Venetia Burney Student Dust Counter
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1010:Long Range Reconnaissance Imager
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141:REX is also being used in the
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373:10.1109/URSIGASS.2011.6051216
329:. IEEE Aerospace Conference.
76:, measurements of a possible
23:Diagram of the trajectory of
1103:Southwest Research Institute
653:10.1016/j.icarus.2016.06.027
1088:Goddard Space Flight Center
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1078:Applied Physics Laboratory
300:AGU Fall Meeting Abstracts
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1093:Jet Propulsion Laboratory
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431:10.1007/s11214-018-0507-4
345:10.1109/AERO.2004.1367922
265:10.1007/s11214-007-9302-3
54:is an experiment on the
52:Radio Science Experiment
126:radiometric temperature
64:during the 2015 flyby.
1314:Spacecraft instruments
1255:Hubble Space Telescope
1113:University of Colorado
105:ultrastable oscillator
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28:
747:New Frontiers program
401:Space Science Reviews
245:Space Science Reviews
129:gravitational moments
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22:
1273:Pluto Kuiper Express
733:Exploration of Pluto
552:10.1002/2015JE004880
132:ionosphere structure
74:Plutonian atmosphere
1108:Stanford University
645:2017Icar..287...12N
544:2015JGRE..120.1497B
423:2018SSRv..214...77S
367:. IEEE Conference.
312:2015AGUFM.P54A..05L
257:2008SSRv..140..217T
203:(Experiment aboard
116:Observation goals:
62:atmosphere of Pluto
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483:. 28 February 2018
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1309:New Horizons
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1071:Institutions
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795:Observations
740:New Horizons
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715:New Horizons
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605:. Retrieved
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25:New Horizons
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1260:Kuiper belt
1233:launch site
1213:upper stage
1159:Cathy Olkin
997:Instruments
840:28978 Ixion
835:15810 Arawn
306:: P54A–05.
185:3.2 km
154:Kuiper belt
143:New Horizon
1303:Categories
1179:Hal Weaver
1174:Alan Stern
1044:Subsystems
989:Spacecraft
771:132524 APL
678:NASA - REX
636:1603.00821
607:2018-11-07
583:2018-10-26
535:1509.04660
487:2018-10-26
462:2018-10-26
414:1806.08393
218:References
113:on Earth.
98:low-noise
78:ionosphere
68:Experiment
41:California
1223:3rd stage
1192:Logistics
1154:Brian May
1144:Marc Buie
1064:Personnel
629:: 12–29.
560:118518239
439:119506499
407:(4): 77.
331:CiteSeerX
281:120843039
273:0038-6308
211:Mariner 4
37:Goldstone
1290:Category
1219:Star 48B
1051:GPHS-RTG
917:Rejected
860:Makemake
738:List of
728:Timeline
661:44935431
381:38104601
191:See also
102:receiver
1248:Related
1209:Centaur
1199:Atlas V
961:2014 PN
949:2014 OS
937:2014 MT
925:2011 HM
902:2012 HE
824:2011 KW
812:2011 JY
802:Neptune
776:Jupiter
757:Targets
641:Bibcode
540:Bibcode
419:Bibcode
308:Bibcode
253:Bibcode
1122:People
1098:KinetX
1015:PEPSSI
850:Haumea
845:Quaoar
806:Triton
764:Flybys
742:topics
659:
623:Icarus
558:
437:
379:
333:
279:
271:
100:X-band
82:Charon
1020:Ralph
1005:Alice
781:Pluto
657:S2CID
631:arXiv
556:S2CID
530:arXiv
435:S2CID
409:arXiv
377:S2CID
277:S2CID
241:(PDF)
146:'
1035:SWAP
855:Eris
804:and
506:NASA
304:2015
269:ISSN
205:Juno
199:Juno
1025:REX
952:393
928:102
893:394
649:doi
627:287
548:doi
526:120
427:doi
405:214
369:doi
341:doi
261:doi
249:140
179:376
50:or
48:REX
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183:±
177:2
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