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Full catalog/SNDRJ1IML2PLEVCPS
SNDRJ1IML2PLEVCPS·v2.1·dataset

Temperature and gases at set air pressures (NOAA-20)

Sounder SIPS: JPSS-1 CrIMSS Level 2: Atmospheric state at Standard Pressure Levels derived from CLIMCAPS V2.1 (SNDRJ1IML2PLEVCPS) at GES DISC
atmosphere NASA GES_DISC Level 2 active
In plain English

What it measures. Temperature, moisture, and trace gases reported at standard air-pressure levels, together with surface values, tropopause properties, humidity, and quality flags for each field.

How it's made. Derived from the CrIS and ATMS instruments (together called CrIMSS) on the NOAA-20 satellite using the CLIMCAPS algorithm, which starts from the MERRA-2 reanalysis and so carries a few weeks of latency.

How & where you'd use it. Provides a usable vertical profile of the atmosphere for weather and climate analysis, continuing the AIRS-style record with a newer satellite.

What's measured

ATMOSPHERE › AIR QUALITY › TROPOSPHERIC OZONEATMOSPHERE › ALTITUDE › TROPOPAUSEATMOSPHERE › ATMOSPHERIC CHEMISTRYATMOSPHERE › ATMOSPHERIC TEMPERATUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › SURFACE TEMPERATUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › SURFACE TEMPERATURE › AIR TEMPERATUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › SURFACE TEMPERATURE › SKIN TEMPERATUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › UPPER AIR TEMPERATUREATMOSPHERE › ATMOSPHERIC TEMPERATURE › UPPER AIR TEMPERATURE › VERTICAL PROFILESATMOSPHERE › ATMOSPHERIC WATER VAPORATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR INDICATORS › LAYERED PRECIPITABLE WATERATMOSPHERE › ATMOSPHERIC WATER VAPOR › WATER VAPOR INDICATORS › TOTAL PRECIPITABLE WATERATMOSPHERE › CLOUDS › CLOUD PROPERTIESATMOSPHERE › CLOUDS › CLOUD PROPERTIES › CLOUD FRACTION

Coverage & cadence

  • Time span2015-11-02 → ongoing
  • Measured byJPSS-1 (CrIS, 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

The CLIMCAPS (Community Long-term Infrared Microwave Coupled Product System) algorithm is used to analyze data from the Cross-track Infrared Sounder/Advanced Technology Microwave Sounder (CrIS/ATMS) instruments, also known as CrIMSS (Cross-track Infrared and Microwave Sounding Suite). This file contains the fixed Pressure Level product (PLEV) variables derived from the CLIMCAPS algorithm using data from the JPSS-1 (Joint Polar Satellite System). They include including gas mixing ratio profiles, column totals, surface values, tropopause properties, and relative humidity, together with per-field quality flagging. The profiles are specified at the surface and layer boundaries and are estimated from layer amounts using the L2 algorithm An level 2 granule has been set as 6 minutes of data, 30 footprints cross track by 45 lines along track. There are 240 granules per day, with an orbit repeat cycle of approximately 16 day. The CLIMCAPS algorithm uses data from the second Modern-Era Retrospective analysis for Research and Applications (MERRA-2) as a first-guess for the atmospheric state. Because MERRA-2 products typically have a latency from 3 to 7 weeks, so too do the CLIMCAPS products.

Get the data

sndrj1iml2plevcps_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="SNDRJ1IML2PLEVCPS",
    version="2.1",
    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.