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Full catalog/OCO2_L1aIn_Sample
OCO2_L1aIn_Sample·v11.2·dataset

Raw collated instrument data sample (OCO-2)

OCO-2 Level 1A collated, parsed, science or calibration data V11.2 (OCO2_L1aIn_Sample) at GES DISC
atmosphere NASA GES_DISC Level 1A active
In plain English

What it measures. An early, raw stage of carbon-dioxide-measuring data from the OCO-2 mission, before it has been turned into usable science measurements. It holds depacketized raw sensor readings plus calibrated engineering data.

How it's made. Captured by OCO-2's three near-infrared spectrometers, then unpacked from the satellite's data stream and formatted as the input to the next processing stage.

How & where you'd use it. A behind-the-scenes building block fed into later processing. Most people use OCO-2's finished carbon dioxide products rather than this raw input.

What's measured

ATMOSPHERE › ATMOSPHERIC CHEMISTRY › CARBON AND HYDROCARBON COMPOUNDS › ATMOSPHERIC CARBON DIOXIDESPECTRAL/ENGINEERING › INFRARED WAVELENGTHS › INFRARED RADIANCE

Coverage & cadence

  • Time span2019-11-30 → ongoing
  • Measured byOCO-2 (OCO-2)
  • Processing levelLevel 1A
  • 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

Version 11.2 is the current version of the data set. Older versions will no longer be available and are superseded by Version 11.2. The Orbiting Carbon Observatory is the first NASA mission designed to collect space-based measurements of atmospheric carbon dioxide with the precision, resolution, and coverage needed to characterize the processes controlling its buildup in the atmosphere. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It incorporates three high-resolution spectrometers that make coincident measurements of reflected sunlight in the near-infrared CO2 near 1.61 and 2.06 micrometers and in molecular oxygen (O2) A-Band at 0.76 micrometers. The three spectrometers have different characteristics and are calibrated independently. Their raw data numbers (DN) are delivered correlated in time to the Level 1B process as Level 1A products. Each band has 1016 spectral elements, although some are masked out in the L2 retrieval.This product is the input to the Level 1B process. It is depacketized raw data formatted into a standard granularity with calibrated engineering data (for both science and calibration observations), in the Sample Mode of operation.

Get the data

oco2_l1ain_sample_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="OCO2_L1aIn_Sample",
    version="11.2",
    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.