Arctic Airborne Free Air Gravity Disturbance Data from Devon Ice Cap, June 2019

SEARCH^Arctic CMG GT-2A Gravimeter Level 2 Geolocated Free Air Gravity Disturbance Transect Data contains gravity disturbance measurements collected over the Devon Ice Cap in June 2019. The data were acquired using a GT-2A gravimeter aboard a Basler BT-67 aircraft and processed with proprietary software, referenced to a gravity tie at Resolute Airport. Author Thomas G. Richter contributed this dataset to the Texas Data Repository Harvested Dataverse, last updated in October 2025.

Use Cases

• Modeling the Earth's gravity field and geoid based on free air gravity disturbance measurements.
• Studying glacial isostatic adjustment and subsurface geology beneath ice caps based on airborne gravity transects.
• Calibrating or validating satellite-derived gravity models based on high-resolution airborne survey data.
• Analyzing short-wavelength noise characteristics in gravimetric data based on the described low-pass filter processing.

Strengths

• Data is tied to a known ground reference point at Resolute Airport (982847.8 mGal).
• Processing details are specified, including the use of PPP GPS processing and a 1/150 Hz low-pass filter.
• The dataset covers three specific flights from the SRH2 survey in June 2019.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The data were remapped onto 2018 flight lines, creating a potential temporal mismatch with the timestamps.

Provenance

Source

Texas Data Repository Harvested Dataverse

Collection Method

Airborne survey using a GT-2A gravimeter on a Basler BT-67 aircraft, with data processed via GTGRAV and NovAtel GrafNav software.

Time Range

June 2019

Freshness

Last updated 2025-10 06:38:18; freshness should be verified.

Geography

Devon Ice Cap, Arctic; flights originated from Resolute Airport.