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ramp_getron.pro

This procedure creates a 2-D RON map by subtracting from a dark current ramp the linear fit, and estimating the residuals stdev for each pixel

JWST Data Processing - NIRCam Cryo tests

RAMP_GETRON, data0, fit_params, RON

Creates a RON map subtracting from a dark current ramp the linear fit and estimating the residuals stdev for each pixel

data0 in required type=fltarr(2048,2048,Ngroup): ramp datacube to be analyzed
fit_params in required type=fltarr(2048,2048,2): Two arrays with the intercept and slope derived from the linear fit
RON out required type=fltarr(2048,2048): 2-D array with thre RON map :File Comments: Given a ramp, this procedure removes, for each pixel, the intercept/slope value from the linear fit. This makes the ramp, for each pixel, a zero average stack. In other words, one subtracts bias and dark current from the signal. Then take the stdev of the zero average ramp to get the RON

IDL> RAMP_GETRON,data0,fit_params,RON

Lines:	29 lines
McCabe complexity:	3

Modification date:	Fri May 3 17:15:22 2013
Lines:	55