Journal ArticleDOI
Instrument Calibrations and Data Analysis Procedures for the NEAR X-Ray Spectrometer
R. D. Starr,Pamela Elizabeth Clark,M. E. Murphy,S. R. Floyd,T. P. McClanahan,Larry R. Nittler,Jacob I. Trombka,Larry G. Evans,William V. Boynton,Samuel Bailey,J. S. Bhangoo,I. Mikheeva,J. Brückner,S. W. Squyres,E. McCartney,John O. Goldsten,Ralph L. McNutt +16 more
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TLDR
The X-ray spectrometer onboard the Near Earth Asteroid Rendezvous spacecraft will measure X-rays from the surface of 433 Eros in the energy region 0.7-10 keV as discussed by the authors.About:
This article is published in Icarus.The article was published on 2000-10-01. It has received 28 citations till now. The article focuses on the topics: Spectrometer.read more
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Journal ArticleDOI
MESSENGER detection of electron-induced X-ray fluorescence from Mercury's surface
R. D. Starr,David Schriver,Larry R. Nittler,Shoshana Z. Weider,Paul K. Byrne,George C. Ho,Edgar A. Rhodes,C. E. Schlemm,Sean C. Solomon,Sean C. Solomon,Pavel M. Trávníček +10 more
TL;DR: The X-Ray Spectrometer (XRS) on the MESSENGER spacecraft measured elemental abundances on the surface of Mercury by detecting fluorescent X-ray emissions induced on the planet's surface by the incident solar Xray flux as mentioned in this paper.
Journal ArticleDOI
Observations of suprathermal electrons in Mercury's magnetosphere during the three MESSENGER flybys
George C. Ho,R. D. Starr,Robert E. Gold,Stamatios M. Krimigis,Stamatios M. Krimigis,James A. Slavin,Daniel N. Baker,Brian J. Anderson,Ralph L. McNutt,Larry R. Nittler,Sean C. Solomon +10 more
TL;DR: In 2008, the MESSENGER spacecraft made the first direct observation of Mercury's magnetosphere in the more than 30 years since the Mariner 10 encounters as mentioned in this paper, but did not observe bursts of energetic particles.
Journal ArticleDOI
Elemental Composition of 433 Eros: New Calibration of the NEAR-Shoemaker XRS Data
Lucy F. Lim,Larry R. Nittler +1 more
TL;DR: In this article, a new calibration of the elemental-abundance data for Asteroid 433 Eros taken by the X-ray spectrometer (XRS) aboard the NEAR-Shoemaker spacecraft is presented.
Journal ArticleDOI
Minor element evidence that Asteroid 433 Eros is a space-weathered ordinary chondrite parent body
C. N. Foley,Larry R. Nittler,Timothy J. McCoy,Lucy F. Lim,M. R. M. Brown,M. R. M. Brown,R. D. Starr,Jacob I. Trombka +7 more
TL;DR: Cheng et al. as discussed by the authors reported that 433 Eros is a primitive body with composition and mineralogy similar to ordinary chondrites, but with a surface heavily modified by interactions with the solar wind and micrometeorites, processes collectively termed space weathering.
Journal ArticleDOI
The NEAR-Shoemaker x-ray/gamma-ray spectrometer experiment: Overview and lessons learned
Jacob I. Trombka,Larry R. Nittler,R. D. Starr,Larry G. Evans,Timothy J. McCoy,William V. Boynton,Thomas H. Burbine,J. Brückner,P. Gorenstein,S. W. Squyres,Robert C. Reedy,John O. Goldsten,Lucy F. Lim,Kevin Hurley,Pamela Elizabeth Clark,S. R. Floyd,T. P. McClanahan,E. McCartney,J. Branscomb,J. S. Bhangoo,I. Mikheeva,M. E. Murphy +21 more
TL;DR: The NEAR XGRS detection system was included as part of the interplanetary network (IPN) for the detection and localization of gamma-ray bursts (GRBs).
References
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Radiation detection and measurement
TL;DR: In this paper, the authors present a detailed analysis of the effect of different types of detectors on the performance of the detection of neutrons and their effect on the detection efficiency and error prediction.
Journal ArticleDOI
Apollo 15 Geochemical X-ray Fluorescence Experiment: Preliminary Report.
I. Adler,Jacob I. Trombka,J. Gerard,Paul D. Lowman,R. Schmadebeck,H. Blodget,E. Eller,Lo I Yin,R. Lamothe,P. Gorenstein,Paul Bjorkholm +10 more
TL;DR: The results indicate the existence of a differential lunar highland crust, probably feldspathic, related to the plagioclase-rich materials previously found in the samples from Apollo 11, Apollo 12, Apollo 14, Apollo 15, and Luna 16.
Journal ArticleDOI
Apollo 16 geochemical x-ray fluorescence experiment: preliminary report.
I. Adler,Jacob I. Trombka,J. Gerard,Paul D. Lowman,R. Schmadebeck,H. Blodget,E. Eller,Lo I Yin,R. Lamothe,G. Osswald,P. Gorenstein,Paul Bjorkholm,H. Gursky,B. Harris +13 more
TL;DR: The lunar surface was mapped with respect to magnesium, aluminum, and silicon as aluminum/ silicon and magnesium/ silicon intensity ratios along the projected ground tracks swept out by the orbiting Apollo 16 spacecraft to confirm the idea that the moon has a widespread differentiated crust (the highlands).
Journal ArticleDOI
Remote X-ray spectrometry for NEAR and future missions: Modeling and analyzing X-ray production from source to surface
P. E. Clark,J. I. Trombka +1 more
TL;DR: In this article, the authors discuss the nature of such variations expected for missions to an asteroid, the Moon, and Mercury, and discuss an effective means of removing the effects of solar variability from surface measurements, as indicated by the agreement between theoretical models presented here and Apollo X-ray observations.
Journal ArticleDOI
Compositional mapping with the NEAR X ray/gamma ray spectrometer
Jacob I. Trombka,S. R. Floyd,William V. Boynton,Samuel Bailey,J. Brückner,S. W. Squyres,Larry G. Evans,Pamela Elizabeth Clark,R. D. Starr,E. M. Fiore,Robert E. Gold,John O. Goldsten,Ralph L. McNutt +12 more
TL;DR: The X ray/gamma ray spectrometer (XGRS) instrument on board the NEAR spacecraft will map asteroid 433 Eros in the 07 keV to 10 MeV energy region as discussed by the authors.
Related Papers (5)
X‐ray fluorescence measurements of the surface elemental composition of asteroid 433 Eros
The elemental composition of asteroid 433 Eros: Results of the NEAR-Shoemaker X-ray spectrometer
J. Trombka,S. W. Squyres,J. Brückner,William V. Boynton,Robert C. Reedy,Timothy J. McCoy,P. Gorenstein,Larry G. Evans,James R. Arnold,R. D. Starr,Larry R. Nittler,M. E. Murphy,I. Mikheeva,Ralph L. McNutt,T. P. McClanahan,E. McCartney,John O. Goldsten,Robert E. Gold,S. R. Floyd,Pamela Elizabeth Clark,Thomas H. Burbine,J. S. Bhangoo,Samuel Bailey,M. Petaev +23 more
The X-Ray Spectrometer on the MESSENGER Spacecraft
C. E. Schlemm,R. D. Starr,George C. Ho,K. Bechtold,Sarah A. Hamilton,John D. Boldt,William V. Boynton,Walter Bradley,Martin Fraeman,Robert E. Gold,John O. Goldsten,John Hayes,S. E. Jaskulek,Egidio Rossano,Robert A. Rumpf,Edward D. Schaefer,K. Strohbehn,Richard G. Shelton,Raymond E. Thompson,Jacob I. Trombka,Bruce D. Williams +20 more