Earth Imaging Journal: Remote Sensing, Satellite Images, Satellite Imagery
Breaking News
PlanetObserver Announces Release of PlanetSAT Global Imagery Basemap Version #2017
Clermont-Ferrand, France - 26 April 2017 - The French...
National Geospatial-Intelligence Agency Awards Boundless with $36M Contract
NEW YORK, NY -  Boundless, the leader in open...
INTERGEO 2017: SMART CARTOGRAPHY- Six Examples of How Old-Fashioned Navigation Aids Have Been Transformed into Today’s Smart Maps
Berlin, Germany 25, April 2017 | The 65th Cartography...
Sunworks Announces Strategic Partnership with Quantum Spatial
ROSEVILLE, CA and ST. PETERSBURG, FL - Sunworks, Inc....
Airbus DS Communications Launches Updates to VESTA 9-1-1 and VESTA Analytics Solutions
Airbus DS Communications, a leading public safety communications provider,...

An Earth-orbiting radar can’t see the ocean floor, but it can measure ocean-surface height variations induced by the ocean floor’s topography. When interesting features are discovered in satellite measurements, they later can be surveyed in fine detail by ships.

CryoSat was designed to measure Arctic sea-ice thickness, but high-resolution mapping of ocean-floor topography now is being added to the ice mission’s repertoire.

The main objective of the polar-orbiting CryoSat is to measure the thickness of polar sea ice and monitor changes in the ice sheets that blanket Greenland and Antarctica. But the satellite’s radar altimeter can detect tiny variations in the height of the ice as well as measure sea level.

The topography of the ocean surface mimics the rises and dips of the ocean floor due to the gravitational pull. Areas of greater mass, such as underwater mountains, have a stronger pull, attracting more water and producing a minor increase in ocean-surface height. Therefore, instruments that measure sea-surface height incidentally map the ocean floor in previously uncharted areas.

Read the full story.

Image courtesy of Scripps Institution of Oceanography.

 

Comments are closed.