Inflight Calibration of the NEAR Multispectral Imager 1

Scott Murchie, Mark Robinson, S. Edward Hawkins, Ann Harch, Paul Helfenstein, Peter Thomas, Keith Peacock, William Owen, Gene Heyler, Patricia Murphy, E. H. Darlington, Allen Keeney, Robert Gold, Beth Clark, Noam Izenberg, James Bell, William Merline, Joseph Veverka

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The multispectral imager on the Near-Earth Asteroid Rendezvous spacecraft has been subjected to a comprehensive series of inflight tests to validate its radiometric characteristics measured onground and to characterize instrument stability, pointing, geometric distortion, coalignment with other instruments, and light-scattering characteristics under flight conditions. The results of these tests, described herein, support the conversion of images of 253 Mathilde and 433 Eros into scientifically valid products with known geometric and radiometric characteristics. Key results include stability of dark current during cruise to within 1 data number; stability of the flat field to within the limits of inflight detectability; absolute radiometric accuracy of ∼5%, with no evident systematic change with time; validation of the focal length with an inflight measurement of 166.85 mm, compared to 167.0 ± 0.2 mm derived onground; measurement of coalignment with the near-infrared spectrometer under flight conditions; and quantification of the intensity and distribution of scattered light.

Original languageEnglish (US)
Pages (from-to)66-91
Number of pages26
JournalIcarus
Volume140
Issue number1
StatePublished - Jul 1999
Externally publishedYes

Fingerprint

flight conditions
flight
calibration
rendezvous spacecraft
light scattering
asteroid
near infrared
spectrometer
spacecraft
infrared spectrometers
asteroids
dark current
products
test
distribution
product

Keywords

  • Asteroids
  • Instrumentation
  • Mathilde
  • NEAR
  • Surfaces, asteroids

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Murchie, S., Robinson, M., Edward Hawkins, S., Harch, A., Helfenstein, P., Thomas, P., ... Veverka, J. (1999). Inflight Calibration of the NEAR Multispectral Imager 1. Icarus, 140(1), 66-91.

Inflight Calibration of the NEAR Multispectral Imager 1. / Murchie, Scott; Robinson, Mark; Edward Hawkins, S.; Harch, Ann; Helfenstein, Paul; Thomas, Peter; Peacock, Keith; Owen, William; Heyler, Gene; Murphy, Patricia; Darlington, E. H.; Keeney, Allen; Gold, Robert; Clark, Beth; Izenberg, Noam; Bell, James; Merline, William; Veverka, Joseph.

In: Icarus, Vol. 140, No. 1, 07.1999, p. 66-91.

Research output: Contribution to journalArticle

Murchie, S, Robinson, M, Edward Hawkins, S, Harch, A, Helfenstein, P, Thomas, P, Peacock, K, Owen, W, Heyler, G, Murphy, P, Darlington, EH, Keeney, A, Gold, R, Clark, B, Izenberg, N, Bell, J, Merline, W & Veverka, J 1999, 'Inflight Calibration of the NEAR Multispectral Imager 1', Icarus, vol. 140, no. 1, pp. 66-91.
Murchie S, Robinson M, Edward Hawkins S, Harch A, Helfenstein P, Thomas P et al. Inflight Calibration of the NEAR Multispectral Imager 1. Icarus. 1999 Jul;140(1):66-91.
Murchie, Scott ; Robinson, Mark ; Edward Hawkins, S. ; Harch, Ann ; Helfenstein, Paul ; Thomas, Peter ; Peacock, Keith ; Owen, William ; Heyler, Gene ; Murphy, Patricia ; Darlington, E. H. ; Keeney, Allen ; Gold, Robert ; Clark, Beth ; Izenberg, Noam ; Bell, James ; Merline, William ; Veverka, Joseph. / Inflight Calibration of the NEAR Multispectral Imager 1. In: Icarus. 1999 ; Vol. 140, No. 1. pp. 66-91.
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