ARGOS satellite system status & improvements

Transcription

1 PAGE 1 ARGOS satellite system status & improvements Yann Bernard CLS, Oceanography AST 14 th meeting, Wellington, New-Zealand

2 METOP-B & SARAL satellites 2 new Argos satellites recently successfully launched!!! PAGE 2 METOP-B on September 17, 2012 SARAL on February 25, 2013

3 Argos system status 8 Argos operational satellites: - 4 x Argos-2-4 x Argos-3 (only 2 with downlink ON) PAGE 3 Argos-4 instruments under preparation at CNES

4 Argos system status PAGE 4 Argos uplink frequency band Argos satellites launch years High data rate platforms Dedicated bandwith for low ouput power applications Argos- 1 Argos Argos Argos MHz Initial Argos frequency band and uplink modulation are preserved Sustainability of the Argos satellite system is compatible with long lifetime program (like Argo with floats lifetime ~10 years)

5 A new operations center in Toulouse, France PAGE 5 Operational 24/7 ISO 9001 certified platforms tracked 3M of msg processed per day 500 Tb of data stored every month 99.68% of system availability For the reception, processing, validation, distribution and archiving of data collected by Argos

6 Coming soon PAGE 6 More data online on ARGOS Web (20 days of positions) Possibility to download 1 year of archived data through ArgosWeb A new web interface with improved cartography An Android application available to consult Argos positions tracks from Smart phones or Pads

7 SHARC project SHARC = Satellite High-performance ARGOS-3/-4 Receive/transmit Communication PAGE 7 30-month ESA project of 2 Millions To implement ARGOS-3 and ARGOS-4 capabilities onboard an Integrated Circuit Such component will be provided at very low cost to all Argos manufacturers/integrators This miniaturized ARGOS transceiver will work at very low power consumption allowing deployments of ARGOS-3/4 technology in most applications.

8 SHARC project SHARC = Satellite High-performance ARGOS-3/-4 Receive/transmit Communication PAGE 8 It will be used either as: a regular PTT (transmitter), a single downlink receiver, a half duplex transceiver or two separate modules that can be directly managed by the application controller. We expect this module to deliver a signal output power of 250 mwatt (TBC) without having to implement an external amplification. First prototype application will be a pop-up tag produced at very low cost (~1000 ) Expected to be available 2015.

9 How to use Argos? PAGE 9 UNTIL 2016: For a volume of data per profile < 0.5 Kbytes Argos-2 (reliable, easy to implement) For a volume of data per profile from 0.5 Kbytes to 2.5 Kbytes Argos-3 low data rate mode (reliable, low cost, short time on surface, low power consumption, secured data transmission, no restriction of areas) For a volume of data per profile > 2.5 Kbytes Argos-3 high data rate mode (reliable, low cost, short time on surface, low power consumption, secured data transmission, areas restricted to open seas)

10 How to use Argos? AFTER 2016: PAGE 10 ARGOS-2 mode still available (ascending compatibility) ARGOS-3 mode still available with a 3-satellite constellation (Metop- B, Saral, Metop-C) ARGOS-4 available with new improved performances (especially for high volume of data to be transmitted). Operational until ARGOS-5 already under studying

11 Argos Location with KF method PAGE 11 One Argos location can be computed with: at least one received Doppler frequency integration of platform dynamics (previous set of positions if exist) the use of a KF to calculate positions. New method applied on all Argo floats since the 13th of June 2011 GPS free positioning system Position accuracy up to 250 m Error estimates provided

12 Advantages of Argos Location with KF method PAGE 12 Main benefits for the Argo program: More positions = +8% in average of new Argos positions computed with the new method Better accuracy = more class 3 locations (accuracy <250m) % in average Elimination of all unrealistic positions OLD Error estimations provided as error ellipses for all location classes NEW

13 Proposed improvements for Argo ADMT action item 25 & 56 trajectory data CLS & JCOMMOPS cooperative project PAGE 13 Improve the existing Argo trajectory dataset from January 2008 with: the reprocessing of all Argos locations with the Kalman filtering method providing diagnostic data with error ellipses Provide easier access to Argos error ellipses data to all DACs for future profiles Project is composed by 3 work packages

14 Proposed improvements for Argo trajectory data PAGE 14 WP1 : Reprocessing of all Argos locations with the Kalman filtering method and providing error ellipses for the Argo array from January 2008 to June Argo floats active on this period Argo profiles transmitted via Argos system More than 7.6 millions of Argos locations to reprocess Work package duration: 28.5 days

15 Proposed improvements for Argo trajectory data PAGE 15 WP2: Provide all Argos error ellipses information to DACS from June 2011 until the setup of a routine service & a dedicated distribution environment on the JCOMMOPS information system. Work package duration: 15.5 days WP 3: Setup of a routine service to provide and archive all trajectory data, including error ellipses, for official Argo floats using the Argos system on a monthly basis in the JCOMMOPS information system. Work package duration: 17.5 days

16 Proposed improvements for Argo trajectory data PAGE 16 Total project duration estimation is 63.5 days A proposal will be sent to the AST for decision

17 Thanks for your attention PAGE 17 Questions?