This is a file from the Wikimedia Commons

File:Jason-1 measurement system.gif

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Jason-1_measurement_system.gif(651 × 527 pixels, file size: 72 KB, MIME type: image/gif)

Summary

Description
English: Every 10 days, Jason-1 measures the height of more than 90% of the world's ice-free ocean with its radar altimeter and completes 127 revolutions, or orbits, around Earth.

To measure sea surface height it is necessary to know satellite's exact position in its orbit and the distance between the satellite and the ocean's surface. Corrections are made for variable amounts of water vapor in the lower atmosphere and free electrons in the upper atmosphere, which can delay the altimeter's microwave pulses.

The sea height caused by gravity (the geoid) is mathematically removed in order to create maps of ocean surface topography.
Date
Source http://sealevel.jpl.nasa.gov/gallery/posters.html
Author NASA/JPL

Licensing

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
NASA logo.svg
Dialog-warning.svg
Warnings:

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current18:39, 6 October 2008Thumbnail for version as of 18:39, 6 October 2008651 × 527 (72 KB)Maddox1{{Information |Description={{en|1=Every 10 days, Jason-1 measures the height of more than 90% of the world's ice-free ocean with its radar altimeter and completes 127 revolutions, or orbits, around Earth. To measure sea surface height it is necessary to
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Global file usage

The following other wikis use this file: