C1XS Spectral Analysis Method
Abstract
We present an approach to analyzing X-ray fluorescence spectra from the lunar surface obtained using the Chandrayaan-1 X-ray Spectrometer (C1XS: Grande et al. (2009), Howe et al. (2009)). The method employed is based on a self calibrating forward model using first order predictions of the fluorescence spectrum. The initial conditions are taken as a featureless thermal bremsstrahlung spectrum generated using measurements from the GOES X-ray monitors. An iterative best fit approach is then applied allowing the abundance of each element as a free parameter in turn. The overall model spectrum is normalized to the intensity of the silicon K-α line with the abundance of Si fixed to the lunar average. In this way the method self calibrates removing the uncertainty inherent in using data from separate spacecraft for the analysis.
- Publication:
-
Workshop X-ray Fluorescence Spectroscopy in Planetary Remote Sensing
- Pub Date:
- March 2010
- Bibcode:
- 2010ESASP.687E...5S