readASD
Read ASD FieldSpec Pro binary and ASCII files
Description
Read single or multiple binary and ASCII files acquired with an ASD FieldSpec Pro (ASDi, Boulder, CO) spectroradiometer
Usage
readASD(fnames, in_format, out_format)
Arguments
fnames |
a character vector of the name(s) (with absolute path) of the file(s) to read. |
in_format |
the format of the input file: |
out_format |
the format of the output: 'matrix' (default) or 'list' (see below). |
Value
if out_format = 'matrix', reflectance values of the input file(s) in a single matrix.
if out_format = 'list', a list of the input file(s) data consisting of a list with components:
-
Namename of the file imported -
datetimedate and time of acquisition inPOSIXctformat -
headerlist with information from the header file -
radianceif applicable, a numeric vector of radiance values -
referenceif applicable, a numeric vector of radiance values of the white reference -
reflectancenumeric vector of reflectance values -
wavelengthnumeric vector of the band positions
Note
There is a R port of the ‘importasd.m’ function from the ‘FSFPostProcessing’ Matlab toolbox by Iain Robinson (University of Edinburgh), which is based on some Java code provided by Andreas Hunei (University of Zurich).
It seems that ASD file format has changed quite a lot with file versions. The function will possibly not work as expected for all versions. Please report any bugs to the package maintainer.
Author(s)
Antoine Stevens (R port), Iain Robinson (matlab function) & Leonardo Ramirez-Lopez (R port)
References
Robinson, I., and A. MacArthur. 2011. The Field Spectroscopy Facility Post Processing Toolbox User Guide. Post processing spectral data in MATLAB, University of Edinburgh, Edinburgh, UK.