5. September 2016

DLR fire de­tec­tion satel­lite BIROS suc­cess­ful­ly re­leas­es BEESAT-4 pi­cosatel­lite in­to space

In­stalling the BEESAT-4 pi­co-satel­lite in BIROS
Image 1/3, Credit: DLR.

Installing the BEESAT-4 pico-satellite in BIROS

The BEESAT-4 pi­co-satel­lite is in­stalled in the BIROS fire de­tec­tion satel­lite by a staff mem­ber of TU Berlin be­fore BIROS was launched in­to space on June 22 2016. The pi­co-satel­lite is ex­pect­ed to gath­er pre­cise po­si­tion and or­bital de­ter­mi­na­tion in­for­ma­tion as well as use a cam­era to take se­ries of pho­tos and in­di­vid­u­al im­ages of the Earth’s sur­face dur­ing its one-year mis­sion. The teleme­try val­ues and im­age da­ta col­lect­ed are then sent to BIROS that then for­wards it to the TU Berlin ground sta­tion for anal­y­sis.
BEESAT-4 flight mod­el
Image 2/3, Credit: Technical University of Berlin.

BEESAT-4 flight model

The il­lus­tra­tion shows a BEESAT-4flight mod­el. Fol­low­ing its ejec­tion from the larg­er BIROS satel­lite, the cu­bic pi­co-satel­lite (Cube­Sat) with sides ten cen­time­tres long is ex­pect­ed to sup­port the AVAN­Ti ex­per­i­ment on board BIROS with GPS da­ta, among oth­er things. This da­ta is sent to the BIROS fire de­tec­tion satel­lite via an in­ter-satel­lite link.
Com­po­nents of the BEESAT-4 pi­cosatel­lite
Image 3/3, Credit: Technical University of Berlin.

Components of the BEESAT-4 picosatellite

The BEESAT-4 pi­cosatel­lite con­tains a re­dun­dant on-board com­put­er, bat­ter­ies and a com­mu­ni­ca­tion sys­tem, as well as sen­sors need­ed for de­ter­min­ing the po­si­tion. In ad­di­tion, the DLR Phoenix GPS re­ceiv­er is used for pre­cise po­si­tion and or­bital de­ter­mi­na­tion. An in­stalled cam­era is used to take var­i­ous im­ages of the sur­face of the Earth to de­ter­mine the po­si­tion of the satel­lite.

On 9 September 2016 at 13:00 CEST, the BIROS (Bi-Spectral Infrared Optical System) fire detection satellite developed and built by the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) released BEESAT-4 (Berlin Educational and Experimental Picosatellite) into space 515 kilometres above the Norwegian Svalbard archipelago. The cubic satellite with sides 10 centimetres long was developed and built by staff and students at the Technical University of Berlin (TU Berlin) and was supported by the DLR Space Administration with funds from the German Federal Ministry for Economic Affairs and Energy (Bundesministerium für Wirtschaft und Energie; BMWi).

BEESAT-4 should now be able to use the on-board Phoenix GPS receiver to gather precise position and orbit determination information, as well as take series of photographs and individual images of Earth's surface with a special camera to confirm the position of the satellite. The telemetry and image data will then be sent to the BIROS 'mother ship' that then forwards it to the TU Berlin ground station for analysis. BIROS was successfully launched from the Satish Dhawan Space Centre in India on 22 June 2016.

"Precise knowledge of the position of the picosatellite (CubeSat) is a prerequisite for formation flights for multiple satellites. With the picosatellite class in particular, formation flights offer the advantage that tasks and functions can be allocated to different satellites. Furthermore, multiple satellites enable longer overflight times over ground stations for the transmission of telemetry and payload data. In addition, regions of interest can be flown over multiple times," explains Sascha Weiss, the BEESAT-4 project leader at TU Berlin, adding: "We are continuing our sequence of picosatellites with BEESAT-4. We specifically want to determine the position of the satellite over the next 12 months using the Phoenix GPS receiver so we can predict the orbit of BEESAT-4."

The BEESAT-4 mission builds on the knowledge and experience of previous BEESAT missions, so the majority of the work is not spent on the construction of the satellite but on developing the complex software. "Two science staff and two students have been on our team since 2013. With the development and operation of BEESAT-4, we have been able to reinforce the practical aspects of student training at TU Berlin’s Institute of Aerospace. Numerous undergraduates have completed their theses within the scope of the mission," explains Weiss.

  • Lisa Eidam
    Ger­man Aerospace Cen­ter (DLR)
    Ger­man Space Agen­cy at DLR
    Space Ad­min­is­tra­tion, Com­mu­nika­tion
    Telephone: +49 228 447-552
    Fax: +49 228 447-386
    Königswinterer Straße 522-524
    53227 Bonn
  • Christian Nitzschke
    Ger­man Aerospace Cen­ter (DLR)

    DLR Space Ad­min­is­tra­tion, Gen­er­al Tech­nolo­gies and Robotics
    Telephone: +49 228 447-366
    Fax: +49 228 447-718
    Königswinterer Straße 522-524
    53227 Bonn-Oberkassel
  • Sascha Weiß
    Tech­ni­cal Uni­ver­si­ty of Berlin

    De­part­ment of Aero­nau­tics and As­tro­nau­tics (ILR)
    Telephone: +49 30 314-79464
    Fax: +49 30 314-21306

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