Derivation of the final OSIRIS-REx OVIRS in-flight radiometric calibration

Amy A. Simon, Dennis C. Reuter, Dante S. Lauretta

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The OSIRIS-REx Visible and InfraRed Spectrometer (OVIRS) operates over the 1/40.4- to 4.3-μm wavelength range. Radiometric calibration over this broad range requires the use of multiple calibration sources. Initial OVIRS in-flight calibration coefficients were previously computed using ground calibration from visible integrating sphere and IR blackbody sources, cross-calibrated with Earth-observing satellites for visible wavelengths, and adjusted using the spectrum of the OSIRIS-REx mission's target body, asteroid (101955) Bennu. As part of the final in-flight calibration, we determined that the best calibration method removes out-of-band IR signal leakage prior to radiometric calibration and updated the calibration coefficients accordingly. These final calibration coefficients work well for data where the field of view is filled, and we document the possible artifacts in underfilled spots.

Original languageEnglish (US)
Article number020501
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume7
Issue number2
DOIs
StatePublished - Apr 1 2021

Keywords

  • OSIRIS-Rex
  • calibration
  • optics
  • pipeline
  • radiometry
  • spectrometer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Instrumentation
  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Derivation of the final OSIRIS-REx OVIRS in-flight radiometric calibration'. Together they form a unique fingerprint.

Cite this