Invert_PROSPECT: Performs PROSPECT inversion using iterative optimization in...

In jbferet/prospect: PROSPECT leaf radiative transfer model and inversion routines

Performs PROSPECT inversion using iterative optimization in order to define estimate a set of user defined parameters

Description

Performs PROSPECT inversion using iterative optimization in order to define estimate a set of user defined parameters

Usage

Invert_PROSPECT(
  SpecPROSPECT = NULL,
  Refl = NULL,
  Tran = NULL,
  InitValues = data.frame(CHL = 40, CAR = 10, ANT = 0.1, BROWN = 0, EWT = 0.01, LMA =
    0.01, PROT = 0.001, CBC = 0.009, N = 1.5, alpha = 40),
  Parms2Estimate = "ALL",
  PROSPECT_version = "D",
  MeritFunction = "Merit_PROSPECT_RMSE",
  xlub = data.frame(CHL = c(1e-04, 150), CAR = c(1e-04, 25), ANT = c(0, 50), BROWN = c(0,
    4), EWT = c(1e-08, 0.1), LMA = c(1e-08, 0.06), PROT = c(1e-07, 0.006), CBC = c(1e-06,
    0.054), N = c(0.5, 4), alpha = c(10, 90)),
  Est_Brown_Pigments = FALSE,
  Est_alpha = FALSE,
  verbose = FALSE,
  progressBar = TRUE
)

Arguments

SpecPROSPECT	list. Includes optical constants refractive index, specific absorption coefficients and corresponding spectral bands
Refl	numeric. Measured reflectance data
Tran	numeric. Measured Transmittance data
InitValues	data.frame. Default values of PROSPECT parameters. During optimization, they are used either as initialization values for parameters to estimate, or as fix values for other parameters. Parameters not compatible with PROSPECT_version are not taken into account.
Parms2Estimate	character. Parameters to estimate (can be 'ALL')
PROSPECT_version	character. prospect version used for inversion: 'D' or 'PRO' See details.
MeritFunction	character. name of the function to be used as merit function with given criterion to minimize (default = RMSE)
xlub	data.frame. Boundaries of the parameters to estimate. The data.frame must have columns corresponding to Parms2Estimate first line being the lower boundaries and second line the upper boundaries.
Est_Brown_Pigments	boolean. should brown pigments be accounted for during inversion?
Est_alpha	boolean. should alpha be accounted for during inversion?
verbose	boolean. set true to get info about adjustment of tolerance or initialization
progressBar	boolean. show progressbar?

Details

Two versions of prospect are available for inversion. The version is depending on the parameters taken into account:

Version	D	PRO
CHL	✅	✅
CAR	✅	✅
ANT	✅	✅
BROWN	✅	✅
EWT	✅	✅
LMA	✅
PROT		✅
CBC		✅
N	✅	✅

Argument InitValues is expecting a default value for each of the parameters as well as an alpha value.

Value

OutPROSPECT estimated values corresponding to Parms2Estimate

jbferet/prospect documentation built on Feb. 10, 2025, 9:35 a.m.