Category Archives: Astronomie

Gaia Launch at ESOC

I am very thankful that I have been invited to the European Space Operations Center in Darmstadt to join the official launch event for the ESA Gaia mission. Here are some pictures. All in all it was a very cool event, although it was more press than science oriented.

Main entrance
Main entrance
Ariane model
Ariane model
Some satellite in one of the buildings
Some satellite in one of the buildings
"Our" Gaia satellite as 1:4 model
“Our” Gaia satellite as 1:4 model
ESOC Controll Room, picture of picture
ESOC Control Room, picture of picture
Sunshield deployed ... so we could drive home with a good feeling.
Sunshield deployed … so we could drive home with a good feeling.

Gaia Launch Postponed

Thats bad news:

I heard through the grapevine that the new launch window opens in mid December.


Now ESA officially tells about the reasons:

Yesterday, the decision was taken to postpone the launch of ESA’s Gaia mission after a technical issue was identified in another satellite already in orbit. Gaia shares some of the components involved in this technical issue and prompt notification of this problem has allowed engineers working on the final preparations for Gaia’s launch to take additional precautionary measures. The issue concerns components used in two transponders on Gaia that generate ‘timing signals’ for downlinking the science telemetry. To avoid potential problems, they will be replaced. The transponders will be removed from Gaia at Kourou and returned to Europe, where the potentially faulty components will be replaced and verified. After the replacements have been made, the transponders will be refitted to Gaia and a final verification test made. As a consequence of these precautionary measures, it will not be possible to launch Gaia within the window that includes the previously targeted launch date of 20 November. The next available launch window is 17 December to 5 January 2014. More details will be given as soon as they are available. The new launch date will be announced when the timeline for completing the additional work has been confirmed and the overall launch manifest of Arianespace has been established.

E-Mails I like

The paper of me and Enrico Mai from the IFE in Hannover got accepted today. This marks some kind of final point in the very successful story of my pre-diploma thesis. I’ve cooperated with Enrico and he was a very good supervisos. So thanks again!

Article Title: Numerical Orbit Integration based on Lie Series with Use of  Parallel Computing Techniques
In: Advances in Space Research


I am pleased to tell you that your manuscript has now been accepted for  publication in Advances in Space Research and will shortly be sent to the publisher for processing.

[UPDATE]: The paper is now available online: as usual behind a pay-wall … I have to check if I am allowed to upload the PDF to this page.