HDF5 VIIRS

[tibbben]

explore method to identify and download VIIRS data using the API and then extract layers as geotiffs ...

• https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/VNP46A4#overview
• https://blackmarble.gsfc.nasa.gov/tools/OpenHDF5.py

Manual data aquisition

data source (needs login):

• https://ladsweb.modaps.eosdis.nasa.gov/search/order/2/VNP46A4--5000
• https://ladsweb.modaps.eosdis.nasa.gov/search/order/4/VNP46A4--5000/2023-01-01..2024-01-01/N/-80.8,26.4,-79.6,25.1
• product: VNP03IMGLL - VIIRS/NPP Imagery Resolution Terrain-Corrected Geolocation 6-Min L1 Swath 375m Light
• some date
• some place (draw bounding box)
• get the data ....
• get panoply: https://www.giss.nasa.gov/tools/panoply/

API data aquisition

or API: https://nrt3.modaps.eosdis.nasa.gov/help/downloads

process to use goal to extract one layer from the HD5 file

$ gdalinfo HDF5:"VNP46A4.A2023001.h09v06.001.2024020041202.h5"://HDFEOS/GRIDS/VIIRS_Grid_DNB_2d/Data_Fields/NearNadir_Composite_Snow_Free | grep BoundingCoord
EastBoundingCoord=-80
NorthBoundingCoord=30
SouthBoundingCoord=20
WestBoundingCoord=-90
$ gdal_translate -a_srs EPSG:4326 -a_ullr -90 30 -80 20 HDF5:"VNP46A4.A2023001.h09v06.001.2024020041202.h5"://HDFEOS/GRIDS/VIIRS_Grid_DNB_2d/Data_Fields/NearNadir_Composite_Snow_Free test.tif