Doris-equiped satellites

The Doris system has been a great technical, operational and scientific success. The Doris instrument, which is already flying on a number of satellites and is being considered for several new missions, guarantees users a high-quality operational service providing precise orbit determination over the long term. With more satellites carrying the Doris instrument, the system will make more accurate than before.

 

Current on-orbit constellation

Currently six Doris contributor satellites are in flight, and their measurements are available at the IDS data centers (not yet for HY-2A).

  • Jason-1, the Cnes/Nasa Topex/Poseidon follow-on mission was launched on December 7, 2001 with a miniaturized second generation Doris receiver, a GPS and LRA localisation system. Due to the South Atlantic Anomaly (SAA) effect on the Jason-1 on-board Ultra Stable Oscillators (USO), a correction model has been developed:
  • by J.M. Lemoine and H. Capdeville (J. Geodesy, 2006) and is available on IDS website.
    Further information on Jason-1 mission.
  • Spot-5 (Cnes) was launched on May 4, 2002 with a miniaturized second generation Doris receiver. The mission should be extended to 2015. Further information on on the Cnes Space Scientific Missions website.
  • OSTM/Jason-2 (Cnes/Nasa/Eumetsat/Noaa) - The Topex/Poseidon and Jason-1 follow-on ocean observation mission was launched on June 2008. Jason-2 takes on board the new DGXX Doris receiver (7-channels: beacons simultaneous tracking capability has been raised up to seven beacons, USO new generation allowing a better frequency stability while crossing SAA, a better quality of MOE and Jason-2 useful for beacons location), and LRA and GPS as tracking systems. Further information on OSTM/Jason-2.
  • Cryosat-2 (ESA) was launched in April 2010 with on board a Doris DGXX Receiver + LRA, (3.5 years as nominal lifetime). Further information on Esa website.
  • HY-2A (China Academy of Space), launched in August 2011 with on board a Doris DGXX + LRA + GPS (nominal life time of 3 years). Further information on M.Dejus (2012) presentation, Doris on HY-2A (pdf) at IDS worshop Venice, and on HY-2A mission.
  • Saral (Cnes/Isro cooperation), launched on 2013/02/25, , with a Doris DGXX + (nominal lifetime of 5 years). Further information on Saral.

From June 2008 to end of January 2009, both Jason-1 and OSTM/Jason-2 satellites were on the same orbit with a one minute shift. Then, thanks to five orbit change manoeuvers peformed between January 26th 2009 and February 14th 2009, Jason-1 is now located in an interleaved orbit with respect to Jason-2, with a time lag of approximately 5 days. This new tandem configuration is better suited for real-time applications.

Satellites

Doris receiver generation

Doris redundancy

Other tracking system

Cospar #

Doris instrument end

Spot 2

1G

No

-

9000501

30-Jun.-2009

Topex/
Poseidon

1G

Yes

SLR+GPS

9205201

1-Nov-2004

Spot 3

1G

No

-

9306101

9-Nov-1996

Spot 4

1G

No

-

9801701

11-01-2013

Jason-1

2GM

Yes

SLR+GPS

0105501

 

Envisat

2G

Yes

SLR

0200901

8-April-2012

Spot 5

2GM

No

-

0202101

 

STPSat-1

CITRIS

-

GPS

0700604

 

Jason-2

DGXX

Yes

SLR+GPS

0803201

Cryosat-2

DGXX

Yes

LRR

100131

HY-2A

DGXX

Yes

LRA+GPS

110431

Saral

DGXX

Confirmed future Doris missions

The future Doris missions are numerous and should guarantee a constellation with at least three Doris contributor satellites through 2020:

  • Sentinel-3A (GMES/ESA) is planned for 2014 (Doris DGXX + LRA + GPS) (nominal lifetime of 7 years), Then sentinel 3B is planned for 2017. Further information on Esa website.
  • HY-2B (China Academy of Space Technology) is planned for 2014 (Doris DGXX + LRA + GPS)
  • Jason-3 (Eumetsat/Noaa/Cnes) is foreseen from 2015 (Doris DGXX-S + LRA + GPS). Further information on Jason-3.
  • Jason CS (GMES - Eumetsat/Noaa/Nasa/Esa/Cnes) (2017) with DGXX-S, LRA, GPS
  • Swot (Surface Water Ocean Topography)  Mission is foreseen for 2020 (DGXX-S + GPS + LRA).  Further information on Swot website or on Aviso website. 

Proposed future missions or missions awaiting approval

  • HY2 Missions and Doris on board  are pending approval:  HY-2C 2015, HY-2D 2019: DORIS + GPS + LRA. Further information on HY-2A.
  • Sentinel 3, C, D with DORIS+GPS+LRA from 2021: to be confirmed.  Further information on Esa website

Further information:

  • A. Auriol (2012), Doris system developments and Future Missions (pdf), presentation IDS workshop 2012, Venice

 

 

EnglishFrançaisEspañol
Rss feedsContactSitemapPartnersFAQGlossaryLexicon
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

The new 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!