In-field absolute calibration of ground and airborne VIS-NIR-SWIR hyperspectral point spectrometers

Offer Rozenstein, Adam Devir, Arnon Karnieli

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Spectrometer calibration and measurements of spectral radiance are often required when performing ground, aerial, and space measurements. While calibrating a spectrometer in the field using an integrating sphere is practically unachievable, calibration against a quartz halogen (QH) lamp is a quite easy and feasible option. We describe a calibration protocol whereby a professional QH lamp, operating with a stabilized current source, is first calibrated in the laboratory against a US National Institute of Standards and Technology (NIST) traceable integrating sphere and, then, used for the field calibration of a spectrometer before a ground or airborne campaign. Another advantage of the lamp over the integrating sphere is its ability to create a continuous calibration curve at the spectrometer resolution, while the integrating sphere is calibrated only for a few discrete wavelengths. A calibrated lamp could also be used for a secondary continuous calibration of an un-calibrated integrating sphere.

Original languageEnglish
Pages (from-to)1158-1170
Number of pages13
JournalRemote Sensing
Volume6
Issue number2
DOIs
StatePublished - 1 Feb 2014

Keywords

  • ASD
  • Field spectroscopy
  • FieldSpec
  • Radiometric calibration

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