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Full catalog/SNDRJ1ML2RMS
SNDRJ1ML2RMS·v3·dataset

Air, rain and surface conditions from space (NOAA-20)

Sounder SIPS: JPSS-1 ATMS Level 2 RAMSES2 Standard: Atmosphere, precipitation and surface geophysical state V3 (SNDRJ1ML2RMS) at GES DISC
atmosphere NASA GES_DISC Level 2 active
In plain English

What it measures. A range of atmospheric and surface conditions pulled from microwave readings, including profiles of temperature, water in all its forms (vapor, cloud, rain, ice), and surface properties, in all weather.

How it's made. Generated by the RAMSES II algorithm from the ATMS microwave sounder on the NOAA-20 (JPSS-1) satellite, which scans across its track in 22 channels and works even through clouds.

How & where you'd use it. Supports weather analysis and forecasting and studies of the atmosphere and precipitation, especially valuable because it returns results in cloudy conditions.

What's measured

ATMOSPHERE › ATMOSPHERIC PRESSURE › SURFACE PRESSUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › SURFACE TEMPERATUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › SURFACE TEMPERATURE › AIR TEMPERATUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › UPPER AIR TEMPERATUREATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR INDICATORS › LAYERED PRECIPITABLE WATERATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR INDICATORS › TOTAL PRECIPITABLE WATERATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR PROFILESLAND SURFACE › SURFACE THERMAL PROPERTIES › SKIN TEMPERATUREOCEANS › OCEAN TEMPERATURE › SEA SURFACE TEMPERATUREATMOSPHERE › PRECIPITATION › LIQUID WATER EQUIVALENTATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR INDICATORS › HUMIDITY › RELATIVE HUMIDITYATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR INDICATORS › HUMIDITY › SPECIFIC HUMIDITY

Coverage & cadence

  • Time span2017-12-01 → ongoing
  • Measured byNOAA-20 (ATMS)
  • Processing levelLevel 2
  • Spatial extent-180, -90, 180, 90
  • StatusACTIVE

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

This level 2 product is generated by the RAMSES (Retrieval Algorithm for Microwave Sounders in Earth Science II algorithm.The RAMSES II algorithm is a microwave only retrieval algorithm using observations from the NOAA-20 (National Oceanic and Atmospheric Administration) also know as Joint Polar Satellite System (JPSS-1) Advanced Technology Microwave Sounder (ATMS) instrument. The ATMS instrument used for this product is a cross-track scanner with 22 channels in spectral bands from 23 GHz through 183 GHz. The RAMSES II Level-2 retrieval products contain a variety of geophysical parameters retrieved from ATMS measurements, including profiles of temperature, water in all phases as well as surface properties for six minutes of instrument observation at a time. The RAMSES II algorithm doesn't have a cloud clearing process and produces all weather retrieval A level 2 granule has been set as 6 minutes of data. There are 240 granules per day, with an orbit repeat cycle of approximately 16 day.

Get the data

sndrj1ml2rms_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="SNDRJ1ML2RMS",
    version="3",
    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.