vignettes/Output-Format-and-Naming.Rmd
Output-Format-and-Naming.RmdOutputs are provided as rasters in ENVI or GeoTiff format according to user’s choice in the output_format argument of pr_convert().
Filenames are built starting from the output folder name provided by the user, by adding appropriate suffixes. If out_basefile is not specified (or set to auto, the Default), output file names are created based on the filename of the hdf5 input. For example, if in_file is PRS_L1_STD_OFFL_20190825103112_20190825103117_0001.he5, the output file for the VNIR cube will be PRS_L1_STD_OFFL_20190825103112_20190825103117_0001_HCO_VNIR.envi (or .tif), that for SWIR will be PRS_L1_STD_OFFL_20190825103112_20190825103117_0001_HCO_SWIR.envi ), etcetera.
If out_basefile is specified, the filenames are created substituting the specified string. For example, if out_basefile is “myprisma”, the output file for the VNIR cube will be myprisma_HCO_VNIR.envi (or .tif), that for SWIR will be myprisma_HCO_SWIR.envi ), etcetera.
Measure units of the output hyperspectral data are as follows:
| LEVEL | Variable | Measure Units |
|---|---|---|
| L1 | Radiance | W / m^2 * sr * um |
| L2B | Radiance | W / m^2 * sr * um |
| L2C | Reflectance | unitless (ratio) |
| L2D | Reflectance | unitless (ratio) |
If output format is “ENVI”, the wavelengths of the different bands for the hyperspectral cubes are properly written in the appropriate header (.hdr) file.
Irrespective from output format, info about wavelengths and fwhms of the hyperspectral cubes are saved in appropriate txt files. For example, if the output file is D:/myoutfolder/myoutfil_HCO_VNIR.envi, info about the wavelengths is saved in D:/myoutfolder/myoutfil_HCO_VNIR.wvl
Info about acquisition date and angles is saved in a dedicated txt file. For example, if output file is D:/myoutfolder/myoutfil_VNIR.envi, info about the angles is saved in D:/myoutfolder/myoutfil_HCO_VNIR.ang