Tiny gravity changes measured from aircraft (IceBridge)
What it measures. Tiny variations in Earth's gravity (called free-air gravity disturbances) measured over Antarctica, pinned to precise locations.
How it's made. Collected with a gravity meter flown on an aircraft over Antarctica during the ICECAP project, supported by NASA's Operation IceBridge; this is a processed (Level-2) product.
How & where you'd use it. Helps reveal the shape and structure of the rock and bedrock beneath Antarctica's ice, supporting research into the continent's geology and ice sheet behavior.
What's measured
Coverage & cadence
- Time span2012-11-22 → 2012-12-04
- Measured byBT-67 (CMG-GT-1A)
- Processing levelLevel 2
- Spatial extent-180, -90, 180, -53
- FormatsXML, ASCII
- StatusCOMPLETE
What you can do with it
- Measure ground motion and subsidence (InSAR)
- Track earthquakes, volcanoes and landslides
- Map elevation and terrain change
Official description
This data set contains geolocated free air gravity disturbances derived from measurements taken over Antarctica using the GT-1A gravity meter S-019. The data were collected by scientists working on the Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP) project, which is funded by the National Science Foundation (NSF) and the Natural Environment Research Council (NERC) with additional support from NASA Operation IceBridge.
Get the data
import earthaccess
earthaccess.login(strategy="netrc") # free Earthdata Login
results = earthaccess.search_data(
short_name="IGCMG2",
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 NSIDC_CPRDBrowsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package. Official links
- Search and order NASA Earth Science data using spatial and temporal filters. Reformatting, reprojecting, and subsetting options are available for some data sets. GET DATA
- Quickly download a few files using a web browser, or access data through a command-line utility such as WGET. GET DATA
- Search data by spatial and/or temporal ranges or file name. Choose from various download options, including a Python script. GET DATA
- A Python library to search and access NASA Earth science data with just a few lines of code GET DATA
- Find more data access options and help resources. VIEW RELATED INFORMATION
- IceBridge CMG GT-1A Gravimeter L2 Geolocated Free Air Gravity Disturbances, Version 1 User Guide VIEW RELATED INFORMATION
- GT-1A and GT-2A Airborne Gravimeters Specification Document VIEW RELATED INFORMATION