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Full catalog/NISAR_L2_GOFF_BETA_V1
NISAR_L2_GOFF_BETA_V1·v1·dataset

How the ground shifted sideways, mapped (NISAR, beta)

NISAR Beta Geocoded Pixel Offsets (Version 1)
land NASA ASF Level 2 active HDF5XMLYAMLPNG
In plain English

What it measures. How far the ground has shifted between two radar passes, measured pixel by pixel and laid onto a map. It captures sideways and along-track movement of the land surface.

How it's made. Created from the NISAR radar satellite by comparing two radar images of the same area and placing the measured shifts onto a map grid at 80 m spacing; the data is delivered raw, without noise filtering, and is an early 'beta' release.

How & where you'd use it. Aimed at tracking ground motion from things like earthquakes, landslides, and glaciers. As a beta product it is meant for users to get familiar with the data, not yet for published science.

What's measured

LAND SURFACE › GEOMORPHIC LANDFORMS/PROCESSESSOLID EARTH › TECTONICSAGRICULTURE › FOREST SCIENCECRYOSPHERE › GLACIERS/ICE SHEETSCRYOSPHERE › FROZEN GROUND

Coverage & cadence

  • Time span2025-10-01 → ongoing
  • Measured byNISAR (L-SAR, S-SAR)
  • Processing levelLevel 2
  • Spatial extent-180, -90, 180, 90
  • FormatsHDF5, XML, YAML, PNG, KML, CSV, PDF
  • StatusACTIVE

What you can do with it

  • Track deforestation, fire scars and land-cover change
  • Monitor crop and vegetation health (NDVI/EVI)
  • Map how built-up vs. green an area is over time
Official description

The NASA-ISRO Synthetic Aperture Radar (NISAR) Geocoded Pixel Offsets (GOFF) product is a Level 2 product derived from the Range Doppler Pixel Offsets (ROFF) product by geocoding the pixel offset layers and its associated data layers (i.e., SNR) on a geographical grid at 80 m posting. Geocoding uses the orbit of the reference Range Doppler Single Look Complex (RSLC) product and a Digital Elevation Model (DEM) to project the data onto a pre-defined Universal Transverse Mercator (UTM) or Polar stereographic projection system map grid. The geocoding algorithm uses a bilinear interpolation for interpolating data layers with floating-point data types. The GOFF product contains a collection of data layers representing the pixel offset shifts between a pair of coarsely coregistered RSLC granules. The spacing, the window size, and the search radius used to generate the pixel offset layers in the range-Doppler geometry are organized by range bandwidth and area of observation. Pixel offset layers are distributed without performing any conventional post-processing operation, i.e., layers might contain offset outliers and are not low pass filtered to reduce noise in the data. The products in this collection are considered Beta products and are intended to enable users to gain familiarity with the parameters and the data formats. Beta products are not intended for use in scientific research.

Get the data

nisar_l2_goff_beta_v1_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="NISAR_L2_GOFF_BETA_V1",
    version="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 ASF
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.