4.9. CLAVR-x Cloud Product Reader

The CLAVR-x reader is for reading files created by the Community Satellite Processing Package (CSPP) Clouds from AVHRR Extended (CLAVR-x) processing system software. The CLAVR-x reader supports CSPP CLAVR-x product files created from VIIRS, MODIS and AVHRR imaging sensors in the native HDF4 format. For more information on this product, please visit the CSPP LEO website: https://cimss.ssec.wisc.edu/cspp/.

The reader can be specified with the polar2grid.sh command using the clavrx reader name. The CLAVR-x reader provides the following products, which include support for the VIIRS Day/Night Band Lunar Reflectance:

Product Name	Description
cloud_type	Cloud Type
cld_height_acha	Cloud Top Height (m)
cld_temp_acha	Cloud Top Temperature (K)
cld_emiss_acha	Cloud Emissivity
cld_opd_dcomp	Cloud Optical Depth Daytime
cld_opd_nlcomp	Cloud Optical Depth Nighttime
cld_reff_dcomp	Cloud Effective Radius Daytime (micron)
cld_reff_nlomp	Cloud Effective Radius Nighttime (micron)
cloud_phase	Cloud Phase (5 categories)
rain_rate	Rain Rate (mm/hr)
refl_lunar_dnb_nom	Lunar Reflectance (VIIRS DNB nighttime only)

4.9.1. Command Line Arguments

usage: polar2grid.sh -r clavrx -w <writer> [-h]

Examples:

polar2grid.sh -r clavrx -w geotiff -h

polar2grid.sh -r clavrx -w awips_tiled --sector-id LCC --list-products -f clavrx_npp_d20220902_t0742031_e0756141_b56210.level2.hdf

polar2grid.sh -r clavrx -w geotiff -p cld_height_acha cloud_phase cloud_type -f noaa20/clavrx_j01*.hdf

polar2grid.sh -r clavrx -w hdf5 --grid-coverage 0.002 -p cld_opd_nlcomp cld_reff_nlcomp refl_lunar_dnb_nom -f snpp/night/clavrx_npp*.hdf

polar2grid.sh -r clavrx -w binary -f clavrx_a1.22245.0759.1000m.level2.hdf

polar2grid.sh -r clavrx -w awips_tiled --num-workers 6 -g lcc_conus_300 --sector-id LCC --letters --compress --grid-coverage 0.002 -p cld_temp_acha cld_height_acha cloud_phase cld_opd_dcomp -f noaa19/clavrx_hrpt_noaa19_*.hdf