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Full catalog/GRACEFO_L1B_ASCII_GRAV_JPL_RL04
GRACEFO_L1B_ASCII_GRAV_JPL_RL04·v4·dataset

Raw satellite-pair gravity measurements (GRACE-FO)

GRACE-FO Level-1B Release version 4.0 from JPL in ASCII
deformation NASA POCLOUD Level 1B ASCII
In plain English

What it measures. The raw, foundational measurements needed to figure out tiny month-to-month changes in Earth's gravity, including the precise inputs from the satellite pair.

How it's made. Low-level calibrated data from the twin GRACE-FO satellites, provided by JPL in plain text format; marked for expert use only.

How & where you'd use it. A building-block input that experts use to compute Earth's gravity field and track water and ice mass changes; most people use the higher-level products instead.

What's measured

SOLID EARTH › GRAVITY/GRAVITATIONAL FIELD › GRAVITY

Coverage & cadence

  • Time span2018-05-22 → ongoing
  • Measured byGRACE-FO (GRACE-FO MWI, GRACE-FO SCA, GRACE-FO ACC, GRACE-FO LRI)
  • Processing levelLevel 1B
  • Spatial extent-180, -89, 180, 89
  • FormatsASCII
  • StatusACTIVE

What you can do with it

  • Measure ground motion and subsidence (InSAR)
  • Track earthquakes, volcanoes and landslides
  • Map elevation and terrain change
Official description

FOR EXPERT USE ONLY. The GRACE-FO Level-1B data provide all necessary inputs to derive monthly time variations in the Earth gravity field. Level-1B data are also used for GRACE orbit and mean gravity field determination. For a detailed description, please see the GRACE-FO Level-1 documentation (https://podaac.jpl.nasa.gov/gravity/gracefo-documentation).

Get the data

gracefo_l1b_ascii_grav_jpl_rl04_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="GRACEFO_L1B_ASCII_GRAV_JPL_RL04",
    version="4",
    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 POCLOUD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.