Subscribe free to our newsletters via your
. 24/7 Space News .

NASA Ships Sensors for Seafaring Satellite to France
by Staff Writers
Pasadena CA (JPL) May 24, 2013

JPL technicians perform a practice run of the mechanical integration sequence that will be used to mate the Jason-3 spacecraft's Advanced Microwave Radiometer instrument to the Jason-3 satellite. The radiometer is one of three NASA-built instruments that are integral components of Jason-3. It measures radiation from Earth's surface at three frequencies to determine the amount of water vapor present in the atmosphere, which affects the accuracy of the Jason-3 altimeter measurements. Credit: NASA/JPL-Caltech.

Three NASA-built instruments that are integral components of the next in a series of U.S./European ocean altimetry satellites have arrived in France for integration with their spacecraft in preparation for a 2015 launch. Jason-3 will extend the two-decade series of satellites that are tracking global sea level changes and enabling more accurate weather, ocean and climate forecasts.

The three instruments are a microwave radiometer and two location-finding systems, along with associated ground support equipment. They left NASA's Jet Propulsion Laboratory, Pasadena, Calif., on May 19 en route to Thales Alenia Space's Integration Center in Cannes, France, where they arrive on May 22.

There, they will be integrated with the Jason-3 spacecraft and tested before being shipped back to California's Vandenberg Air Force Base for launch in March 2015. Thales Alenia Space is the Jason-3 spacecraft contractor for the French space agency, Centre National d'Etudes Spatiales (CNES).

Jason-3 is designed to measure precisely the height of the ocean surface, allowing scientists to monitor ocean circulation and sea level. It will extend the long-term data set established by three previous satellite altimetry missions: Topex/Poseidon (1992-2006), Jason-1 (launched in 2001 and still in operation) and the Ocean Surface Topography Mission/Jason-2 (launched in 2008 and also still in operation).

Jason-3 is being developed and operated as part of an international effort led by the National Oceanic and Atmospheric Administration (NOAA) and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) in collaboration with NASA and CNES. JPL built the three NASA instruments on behalf of NOAA.

Processed data from the satellite will be used in a broad range of applications, including improving our knowledge of global and regional sea level changes, operational ocean and weather forecasting, ocean wave modeling, hurricane intensification prediction, seasonal forecasting, El Nino and La Nina forecasting, and climate research. The data will help address key questions about global climate change.

Details of the three JPL-developed instruments include:

+ The Advanced Microwave Radiometer measures radiation from Earth's surface at three frequencies (18, 23 and 34 gigahertz) to determine the amount of water vapor present in the atmosphere. This water vapor affects the accuracy of altimeter measurements by delaying the time it takes for the altimeter's signals to make their round trip to the ocean surface and back.

+ The Global Positioning System Payload is a tracking system that enhances the location-tracking measurements of CNES' Doppler Orbitography and Radio-positioning Integrated by Satellite instrument aboard Jason-3. It uses triangulated data from the U.S. Global Positioning System constellation of navigation satellites to determine the satellite's precise position in orbit. Its data are used to continuously track the satellite's trajectory.

+ The Laser Retroreflector Array is an array of mirrors that allow the satellite to be tracked with centimeter accuracy by 40 satellite laser ranging stations on the ground. By analyzing the round-trip time of the laser beam, the satellite's precise position in orbit can be determined.

Covering more than two-thirds of Earth, the world's ocean plays a critical role in climate change. "Global warming is raising sea levels and reshaping our ocean," said Josh Willis, Jason-3 project scientist at JPL. "Jason-3 will measure our changing ocean and help us keep our finger on the pulse of Earth's climate."


Related Links
Jason-3 at JPL
Earth Observation News - Suppiliers, Technology and Application

Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks DiggDigg RedditReddit GoogleGoogle

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

NASA's Landsat Satellite Looks for a Cloud-Free View
Greenbelt MD (SPX) May 24, 2013
For decades, Landsat satellites have documented the desiccation of the Aral Sea in Central Asia. Once one of the largest seas in the world, it shrunk to a tenth of its original volume after Russia diverted its feeder rivers in the 1960s. Scientists studying the Aral Sea's changing ecology and retreating shoreline have looked to Landsat - and a new feature of the Landsat Data Continuity Mission ... read more

Moon being pushed away from Earth faster than ever

Bright Explosion on the Moon

NASA says meteor impact on the moon glowed like a star

Where on Earth did the moon's water come from

Opportunity Departing 'Cape York'

Bacterium from Canadian High Arctic and life on Mars

Curiosity Drills Second Rock Target

Mars Rover Opportunity Examines Clay Clues in Rock

Chinese group bids for Club Med holidays: firms

Trip into space with DiCaprio costs $1.55m

Desert Tests Pave Way for Human Exploration of Small Bodies

Russia designs reusable spacecraft good for as many as five missions

Waiting for Shenzhou 10

China launches communications satellite

On Course for Shenzhou 10

Yuanwang III, VI depart for space-tracking missions

Science and Maintenance for Station Crew, New Crew Members Prep for Launch

ESA Euronews: Living in space

Next destination: space

Russia to Send 'Stress-Relief' Software to ISS

Russian Spacecraft Manufacturer to Make Four Launches in 2014

Electric Propulsion

O3b Networks Launcher and payload integration are underway at Kourou

Arianespace underscores strong partnership with Japan during Tokyo meetings

Critical Kepler Reaction Wheel Fails: Mission End In Sight

Sifting Through the Atmosphere's of Far-Off Worlds

New Method of Finding Planets Scores its First Discovery

Team Takes Part in Discovering New Planet

Ecuador's only satellite may have been damaged in space collision

New analysis yields improvements in 3D imaging

Professor who once had to work at Subway makes math breakthrough

Iron-platinum alloys could be new-generation hard drives

The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement