Mobile version

News

10.02.2009 09:08 Age: 16 yrs

Update on the Jason-1 orbit change

Category: News of the other missions

Last maneuvers have put Jason-1 higher than planned. The drift phase should thus last longer. The altimeter could be switch on on February 10, during the drift phase.

Due to two consecutive slight over burns in the thrusters of the satellite, the recent maneuver conducted on February 6 has put Jason-1 only 469 m below the nominal operational orbit, instead of the desired 1,000 m below.  Because of this higher-than-expected intermediary orbit, the fifth and final maneuver to accurately place Jason-1 back into the nominal operational orbit must be delayed and will not take place until February 14, 2009, at the earliest.  (A higher than expected intermediary altitude means that it will take Jason-1 longer to drift to the rendezvous point for the final maneuver).  Further orbit analysis and characterization will be performed in the coming days to confirm these preliminary results and plan the final maneuver sequence.
                                              
It should now be safe to turn on the altimeter at the present altitude while Jason-1 finishes the drift phase. Planning is to turn on the altimeter on February 10. This should give about 4-5 days’ worth of altimeter data in drifting orbit.  This early turn-on of altimeter should also minimize disruption to the AMR operating temperature for better calibration after returning to science data collection in the new nominal orbit.


EnglishFrançais
Rss feedsContactPartnersFAQLexiconLegal noticePersonal Data Protection PolicyMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

This home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!