NoiseEquivalentRadiance: NoiseEquivalentRadiance

In tommasojulitta/FieldSpectroscopyCC: R package for Characterization and Calibration of spectrometers

Description

Compute the Signal to Noise Ratio of a spectrometer

Usage

NoiseEquivalentRadiance(sdLamp = specStats$sdLamp, sdDC = specStats$sdDC, 


    RadCalCoeff, IntegrationTime)

Arguments

sdLamp	numeric vector: sd of the spectra acquired with a stable lamp
sdDC	numeric vector: sd of the dark current spectra acquired with with the same integration time as the measurements over the lamp
RadCalCoeff	numeric vector: wavelength dependent vector of coefficient for calibration
IntegrationTime	numeric value: integration time used for the acqisition of the spectra.

Value

numeric vector: noise equivalent delta radiance for each wavelength

Author(s)

Tommaso Julitta, Mirco Migliavacca, Thomas Wutzler

Examples

  





data("snr_data")


data("rad_cal")





#perform statistics on spectra


#calculate standard deviation of the lamp signal


lamp_sd<-StatsOnSpectra(wl=snr_data$wl,spectra=snr_data$data_lamp,fun='sd')


#calculate standard deviation of the dark spectrum


dc_sd<-StatsOnSpectra(wl=snr_data$wl,spectra=snr_data$data_dc,fun='sd')


#calculate noise equivalent delta radiance


NER<-NoiseEquivalentRadiance(sdLamp = lamp_sd,sdDC = dc_sd,IntegrationTime =  4000,RadCalCoeff = rad_cal$cal)


x11();plot(rad_cal$wl,NER*1000,type="l",xlab="WL [nm]",ylab=expression("Radiance [mW m"^-2* "sr"^-1* "nm"^-1*"]"),ylim=c(0,5))

tommasojulitta/FieldSpectroscopyCC documentation built on May 31, 2019, 6:19 p.m.