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Full catalog/GPM_1BGMI
GPM_1BGMI·v07·dataset

Raw microwave readings for rain (GPM)

GPM GMI Brightness Temperatures L1B 1.5 hours 13 km V07 (GPM_1BGMI) at GES DISC
atmosphere NASA GES_DISC Level 1B active
In plain English

What it measures. Raw, calibrated microwave brightness readings from the GMI instrument across 13 channels, meaning how much microwave energy reaches the sensor before it is turned into weather products.

How it's made. Produced from the GPM mission's GMI radiometer by converting the sensor's raw counts into geolocated, calibrated brightness temperatures using careful in-flight calibration.

How & where you'd use it. A low-level building-block input that mostly feeds into rainfall and precipitation products. Most people use it indirectly through those higher-level products rather than directly.

What's measured

ATMOSPHERE › ATMOSPHERIC WATER VAPORATMOSPHERE › PRECIPITATION

Coverage & cadence

  • Time span2014-03-04 → ongoing
  • Measured byGPM (GMI)
  • Processing levelLevel 1B
  • Spatial extent-180, -70, 180, 70
  • StatusCOMPLETE

What you can do with it

  • Map air pollutants — NO₂, aerosols, ozone
  • Track greenhouse gases and Earth's energy budget
  • Feed weather and air-quality analysis
Official description

Version 07 is the current version of the data set. Older versions will no longer be available and have been superseded by Version 07. The 1BGMI algorithm uses a non-linear three-point in-flight calibration to derive antenna temperature (Ta) and convert Ta to Tb using GMI antenna pattern corrections. The four-point calibration, which utilizes noise diode measurements, is used to monitor the sensor non-linearty. The noise diode measurements also provide a hot load back-up calibration in case hot load measurements are lost. Details are in the GMI ATBD. The 1BGMI algorithm and software transform Level 0 counts into geolocated and calibrated brightness temperatures (Tb) for 13 GMI channels.

Get the data

gpm_1bgmi_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="GPM_1BGMI",
    version="07",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),  # your area (W,S,E,N)
    temporal=("2024-01-01", "2024-12-31"),       # your dates
)
files = earthaccess.open(results)   # stream straight from GES_DISC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.