ABoVE: AirSWOT Ka-band Radar over Surface Waters of Alaska and Canada, 2017

This dataset provides AirSWOT (Surface Water and Ocean Topography) Ka-band (35.75 GHz) radar data products collected from an airborne platform over parts of Alaska and Canada during the period 2017-07-09 to 2017-08-17. Flights targeted specific surface water features, including rivers, lakes, ponds, and wetlands in the ABoVE domain. The radar data include six products: elevation (above the WGS84 ellipsoid), incidence angle, magnitude (backscatter), interferometric correlation (coherence), DHDPHI (incidence angle dependent height sensitivity), and error (estimated height random error, 1-sigma standard deviation). The flight lines were selected to span a full spectrum of permafrost conditions (permafrost-free to continuous permafrost, low to high ground ice content), ecosystems, climatic regions, topographic relief, and geological substrates across the ABoVE domain to investigate surface water responses to thawing permafrost and spatial and temporal variability in terrestrial water storage by measuring elevation and extent of surface waters. The data are provided in two forms: 1) the original output (outer-swath products only) at 3.6 m2 resolution in UTM coordinates from the AirSWOT processing group at the Jet Propulsion Laboratory (JPL), and 2) the ABoVE Projection at 3.6 m2 resolution, clipped to the ABoVE reference grid tiles using the C grid.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated September 22, 2026, 07:19 (UTC)
Created April 1, 2025, 14:05 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 6ea9b36a-68d6-437d-b9d4-9aad83911347
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1646
license https://www.usa.gov/government-works
modified 2026-09-14T22:16:02Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash a25f50771804b066b315975abad256b162a1ba7cb0a10ef7a3eb9776fc5adfa1
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -149.834, "NorthBoundingCoordinate": 70.4944, "EastBoundingCoordinate": -98.629, "SouthBoundingCoordinate": 46.8451}]]
temporal 2017-07-08/2017-08-17
theme {"Earth Science"}