Creation and use of flat field for meteor spectroscopy

In astro photography and spectroscopy a flat field is often used to correct for variations of sensitivity over the image sensor. It is applied by dividing the original image by a suitable flat field image, thereby reducing or eliminating these sensitivity errors. The flat image is obtained with the same optics by taking a short … Continue reading Creation and use of flat field for meteor spectroscopy

Atmospheric extinction, Python processing

In a previous blog I have described the use of instrument response for the flux calibration of meteor spectra. One would like to have a plot of energy against wavelength. Unfortunately the measured intensity is influenced by detector sensitivity, grating efficiency, transmission of optics (window, lens, filters) and atmospheric transmittance (all wavelength dependent). The basics … Continue reading Atmospheric extinction, Python processing