LightResponseCurveFitter_getPriorScale: LightResponseCurveFitter getPriorScale

In bgctw/REddyProc: Post Processing of (Half-)Hourly Eddy-Covariance Measurements

LightResponseCurveFitter getPriorScale

Description

return the prior distribution of parameters

Usage

LightResponseCurveFitter_getPriorScale(thetaPrior, 
    medianRelFluxUncertainty, nRec, ctrl)

Arguments

thetaPrior	numeric vector of location of priors
medianRelFluxUncertainty	numeric scalar: median across the relative uncertainty of the flux values, i.e. sdNEE / NEE
nRec	integer scalar: number of finite observations
ctrl	list of further controls, with entry isLasslopPriorsApplied

Details

The beta parameter is quite well defined. Hence use a prior with a standard deviation. The specific results are sometimes a bit sensitive to the uncertainty of the beta prior. This uncertainty is set corresponding to 20 times the median relative flux uncertainty. The prior is weighted n times the observations in the cost. Hence, overall it is using a weight of 1 / 20 of the weight of all observations.

However, its not well defined if PAR does not reach saturation. Need to check before applying this prior

Value

a numeric vector with prior estimates of the parameters

Author(s)

Department for Biogeochemical Integration at MPI-BGC, Jena, Germany <[e-mail]> [cph], Thomas Wutzler <[e-mail]> [aut, cre], Markus Reichstein <[e-mail]> [aut], Antje Maria Moffat <[e-mail]> [aut, trl], Olaf Menzer <[e-mail]> [ctb], Mirco Migliavacca <[e-mail]> [aut], Kerstin Sickel <[e-mail]> [ctb, trl], Ladislav <U+0160>igut <[e-mail]> [ctb]

bgctw/REddyProc documentation built on March 26, 2024, 11:35 p.m.