Geoskill: GPM Download Test

Download daily GPM IMERG Late Run global precipitation data at 0.1° resolution from NASA GES DISC without authentication.

GPM Precipitation Downloader

Download GPM IMERG (Global Precipitation Measurement) precipitation data from NASA GES DISC.

Overview

This skill downloads GPM IMERG Late Run (GPM_3IMERGDL) daily precipitation data at 0.1° resolution from NASA's Goddard Earth Sciences Data and Information Services Center (GES DISC). Data is freely available via direct HTTPS download.

Data Source

• Dataset: GPM_3IMERGDL (IMERG Late Run Daily)
• Provider: NASA GES DISC (disc.gsfc.nasa.gov)
• Resolution: 0.1° × 0.1° (~10 km)
• Variables: precipitation, precipitationCal, randomError
• Format: HDF5 (.HDF5)
• URL Pattern: https://gpmweb2.gesdisc.eosdis.nasa.gov/data/GPM_L3/GPM_3IMERGDL.07/YYYY/MM/

Usage

Search for available files

bash

python gpm-download.py \
    --start-date 2024-01-01 \
    --end-date 2024-01-31 \
    --bbox 116.0 39.0 117.0 40.0

Download data

bash

python gpm-download.py \
    --start-date 2024-01-01 \
    --end-date 2024-01-31 \
    --bbox 116.0 39.0 117.0 40.0 \
    --download \
    --output-dir ./gpm_data

Select variables

bash

python gpm-download.py \
    --start-date 2024-01-01 \
    --end-date 2024-01-31 \
    --variables precipitation precipitationCal \
    --download

JSON output

bash

python gpm-download.py \
    --start-date 2024-01-01 \
    --end-date 2024-01-31 \
    --output-format json

CLI Arguments

Argument	Description	Default
--start-date	Start date (YYYY-MM-DD)	Required
--end-date	End date (YYYY-MM-DD)	Required
--bbox	Bounding box (minLon minLat maxLon maxLat)	Global
--variables	Variables to download	precipitation
--download	Trigger download	False (search only)
--output-dir	Download directory	./gpm_data
--output-format	Output format (text/json)	text
--no-progress	Disable progress bar	False
--quiet	Suppress progress output	False
--list-variables	List available variables	-

Privacy Disclosure

When this script runs, it sends:

• Date range queries to NASA GES DISC HTTPS endpoints
• No API keys, local files, or PII are sent

License

MIT-0. GPM data © NASA (public domain).