vpr_ctd_files.Rd
Searches through typical VP directory structure
vpr_ctd_files(castdir, cruise, day_hour)
root directory for ctd cast files
cruise name (exactly as in directory structure)
vector of day-hour combinations (e.g, dXXX.hXX)
vector of ctd file paths matching days-hour combinations provided
Use with caution
E. Chisholm and K. Sorochan