• NASA Earthdata Login system
• How to Access Data with Python
• NSIDC: what download options are available
• NASA Earthdata CMR API Documentation

Register with NASA Earthdata Login system and add NSIDC_DATAPOOL_OPS to your NASA Earthdata Applications

python nsidc_subset_altimetry.py -T 2009-01-01T00:00:00,2009-12-31T23:59:59 \
	-B -50.33333,68.56667,-49.33333,69.56667 --version=034 -F NetCDF4 \
	--user=<username> -V -Z GLAH12

• GLAH12: GLAS/ICESat L2 Antarctic and Greenland Ice Sheet Altimetry Data
• ILATM2: Airborne Topographic Mapper Icessn Elevation, Slope, and Roughness
• ILATM1B: Airborne Topographic Mapper QFIT Elevation
• ILVIS1B: Land, Vegetation and Ice Sensor Geolocated Return Energy Waveforms
• ILVIS2: Geolocated Land, Vegetation and Ice Sensor Surface Elevation Product
• ATL03: Global Geolocated Photon Data
• ATL04: Normalized Relative Backscatter
• ATL06: Land Ice Height
• ATL07: Sea Ice Height
• ATL08: Land and Vegetation Height
• ATL09: Atmospheric Layer Characteristics
• ATL10: Sea Ice Freeboard
• ATL12: Ocean Surface Height
• ATL13: Inland Water Surface Height

--help: list the command line options  
-D X, --directory=X: working data directory  
-U X, --user=X: username for NASA Earthdata Login  
-N X, --netrc=X: Path to .netrc file for authentication  
--version: version of the dataset to use  
-B X, --bbox=X: Bounding box (lonmin,latmin,lonmax,latmax)  
-P X, --polygon=X: Georeferenced file containing a set of polygons   
-T X, --time=X: Time range (comma-separated start and end)  
-F X, --format=X: Output data format (TABULAR_ASCII, NetCDF4)  
-M X, --mode=X: Local permissions mode of the files processed  
-V, --verbose: Verbose output of processing  
-Z, --unzip: Unzip dataset from NSIDC subsetting service  

Can include a georeferenced file using the --polygon option.
Presently subsets to the convex hull of the internal polygons.

• read_geojson_file.py: Reads polygons from GeoJSON files
• read_kml_file.py: Reads polygons from keyhole markup language (.kml or .kmz) files
• read_shapefile.py: Reads polygons from ESRI shapefiles (can be zipped)

• numpy: Scientific Computing Tools For Python
• gdal: Pythonic interface to the Geospatial Data Abstraction Library (GDAL)
• shapely: PostGIS-ish operations outside a database context for Python
• fiona: Python wrapper for vector data access functions from the OGR library
• geopandas: Python tools for geographic data
• pyproj: Python interface to PROJ library
• lxml: processing XML and HTML in Python
• future: Compatibility layer between Python 2 and Python 3

The program homepage is:
https://github.com/tsutterley/nsidc-subsetter
A zip archive of the latest version is available directly at:
https://github.com/tsutterley/nsidc-subsetter/archive/master.zip

This program is not sponsored or maintained by the Universities Space Research Association (USRA), the National Snow and Ice Data Center (NSIDC) or NASA. This is a work in progress and will be updated with the release of NASA ICESat-2 data. It is provided here for your convenience but with no guarantees whatsoever.