Satellite Altimetry Sea Floor

193x193 animated globe of predicted topography 295kb.

Satellite altimetry sea floor.

Both offered immense improvements over single beam sonar because they collect data over broad areas rather than distinct spots minimizing the need for interpolation. The two main technologies still used today for large scale seafloor mapping satellite altimetry and multibeam sonar were developed in the 1970s. Mountains on the sea floor add extra pull to earth s gravity field drawing more water around them and bulging the sea surface outward. 112x112 animated globe of predicted topography 140kb gif.

Because satellite altimetry observes sea level in a geocentric reference frame global mean sea level estimates derived from altimetry will not observe the increase in ocean volume due to ocean. This way of estimating depth we call altimetric bathymetry. Smith is at the national oceanic and atmospheric administration code e oc 2 1315 east west highway silver spring md 20910 3282 usa. This product estimates the wave height from the shape and intensity of the altimeter radar echo representing 2 5 km footprint depending on sea state to within 10 or 0 5 meters whichever is greater.

The biggest errors that mostly affect the altimetry derived sea level are the orbit errors and errors in the environmental and geophysical corrections applied. Estimated sea floor topography from satellite altimetry gif. Jason 2 product information handbook link pdf 3 9 mb jason 3 product information handbook link pdf 2 3 mb ostm jason 2 jason 3. Satellite altimetry also.

Smith david t. A variety of parameters may be inferred using the information from radar altimeter measurements such as time varying sea surface height ocean topography the lateral extent of sea ice and altitude of large icebergs above sea level as well as the topography of land and ice sheets and even that of the sea floor. The basis of satellite altimetry is the known process of emitting a radar pulse and measuring the time it takes for the reflection to be detected.