There are to ways to process a mosaic. One way -which should be the standard- is to do it internally in R by calling first mosaic_info and later mosaic_sam.
The function will write in the path specified in the SpectralInfo object returned by mosaic_info a series of binary files holding the SAM results. In other words, the function does not load the results to R automaticaly. You can call this function to load them back to R in a single object, which will be of class SAM.
If you deal with large mosaics, you might want to load only a few of the sam matches. This argument allows you to define up to which match you want to load to R.
drop_raw
If you are not interested in the angles you can set this argument to TRUE and avoid load them to R.