TOPEX and JASON SPACEBORNE ALTIMETERS. Jean PLA CNES, Toulouse, France. Summary. Scope of a spaceborne altimeter Frequency plan for TOPEX and JASON Usage of the data Data Assimilation and forecasting. Topex -Jason Mission Objectives: Scope of a spaceborne altimeter.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
CNES, Toulouse, France
Scope of a spaceborne altimeter
Frequency plan for TOPEX and JASON
Usage of the data
Data Assimilation and forecasting
similar to in-flight T/P ones
7 Dec. 2001
TOPEX/POSEIDON (1992) ; JASON-1 (2001) ; JASON-2 (2007-2008)
Services: Aeronautical Radionavigation
Fixed Satellite (Earth to Space): feeder links of non- GSO satellites in the mobile satellite service
Altitude = 1344 km, beam footprint = 77 km
This instrument collects the natural emission by the ground surface and in the atmosphere at three different (18, 21 and 37 GHz) frequency bands. The goal is to determine the water vapour content and in liquid water in the atmosphere, when combining the whole set of measurements within those bands. Therefore, it is possible to know the correction to be applied to the altimetric measurement. ( NASA)
Alt. Instr. error
From GEOS-3 to Jason-1
Error budget of altimeter missions
Towards an integrated, multi-parameter approach of
ocean modelling and operational forecasting
OCEAN : turbulent & chaotic medium
Integrated approach necessary with :
French initiative : MERCATOR
Process similar to weather forecast
The MERCATOR mission was defined in 1996 by six partner organizations. The project is pursuing three goals:
Mercator Users :
Modelisation & Assimilation
Observation : Satellite & In situ
MERCATOR system organizations. The project is pursuing three goals:
TOPEX, JASON, ...
Altimetry & Oceanography - Operational Organization organizations. The project is pursuing three goals:
Assimilation, forecast :
Altimetry missions :
Jason, ENVISAT, DORIS/SPOT
Other space data
In situ Data: ARGO, CORIOLIS
Navy organizations. The project is pursuing three goals:
"See without being seen"
"Find the most economical route"
"Interesting structures to study"OCEANOGRAPHY APPLICATIONS
Fisheries organizations. The project is pursuing three goals:
Altimeter product from T/P and ERS-2
for fisheries in the Indian ocean
MERCATOR : future activities organizations. The project is pursuing three goals:
The MERCATOR mission seeks to develop and deploy a truly operational oceanography system over the next five years capable of analyzing and predicting ocean conditions around the globe : the Centre for Operational Oceanography (C2O)
This system will describe and predict ocean conditions over the whole ocean column continuously and in real time, at scales ranging from global phenomena to regional areas.