The German ROSAT research satellite was launched on 1 June 1990 on a Delta II launcher and successfully scanned space for X-ray sources for nine years. Its record of achievements extends from discovering countless X-ray sources to analysing galactic clusters, X-ray binary stars and black holes to discovering the reflection of the Sun's X-ray radiation by the Moon. The findings by the scientists involved in the mission have appeared in over 7000 publications. After orbiting Earth for 21 years, ROSAT re-entered the atmosphere over the Bay of Bengal. It is not known whether any parts reached the Earth's surface.

A great deal has happened since DLR’s participation in the Aerospace trade show at Le Bourget in June, and it can all be followed on the recently revamped DLR homepage. Last week’s events mainly focused on the MAKS Aviation and Space Salon in Moscow, the third trade fair for the international aerospace industry, where DLR has been showcasing its work, following its appearances at Le Bourget (Paris) and ILA in Berlin. Just as at the Le Bourget trade fair, at MAKS we were once again able to engage in many interesting and important talks.

In my last blog entry, I focussed on a farewell to the shuttle fleet and some observations on the paradigm shift occurring in the space sector. Space Shuttle Endeavour has now landed safely and Atlantis is being prepared for launch. Images of the International Space Station (ISS) with Space Shuttle Endeavour and docked with the European space transporter ATV 'Johannes Kepler', taken from a Soyuz capsule as it was departing, already have historical value. This time, I would like to focus on my reappointment as Chairman of the DLR Executive Board and on the aspects that will be of central importance in my ongoing work.

On 16 May, the Space Shuttle Endeavour was launched en route to the International Space Station (ISS). On board was the large science experiment, AMS, designed to look for evidence of dark matter and antimatter. The flight is Endeavour's last, and it heralds the end of the shuttle era. In parallel with this somewhat technical farewell, we have also had to say goodbye to Thomas Reiter, who has been Director of Human Spaceflight and Operations for the European Space Agency (ESA)since mid-April. Two departures in the area of space exploration were sufficient reason for me to start reflecting on fundamental issues in spaceflight.

An important meeting of the ESA Council took place on 16 and 17 March in Paris. Among other matters, it dealt with the International Space Station (ISS), ensuring European access to space, and the appointment of ESA Directors. On the first evening of the Council meeting, I was invited by the Ambassador of the Federal Republic of Germany in Paris, Reinhard Schäfers, to visit his official residence. It was a good opportunity to speak, not only about German space strategy in general, but also about the coordination of space activities at a time when we are all concerned regarding the news about the events in Japan.

The topic of 'national activities versus international cooperation' has been discussed quite a bit recently. The 'either … or' question has become a fundamental issue for everyday politics. Our activities in the first two months of 2011 prove that we are not treating this as an 'either … or' issue; instead, we see the combination of national and European efforts and the activities arising from these efforts as a promising arrangement.

The release of secret US documents has caused excitement in recent weeks, both in the news media and among the general public. The latest 'revelations' by Wikileaks concern DLR activities in the space field. Two things must happen now: the 'information' must be considered critically and the repercussions have to be thought about in detail.

Shortly before Christmas, the DLR office in Washington DC invites our partners to attend a Holiday reception. This way, various DLR's various US aerospace sector partners are invited to take a look back at the past year in a convivial atmosphere, and also to make plans for the future. This year, the reception occurred at the end of what proved to be a fascinating business trip, one which took me right across the US and gave me the opportunity to meet many of our partners there.

On 17 November 2011, the Heads of the world's Space Agencies met in Washington, D.C. on the 50th anniversary of the International Academy of Astronautics (IAA) to agree on a joint declaration, 'Space for Humanity', discuss related activities and possible future partnerships. The main meeting was chaired by Professor Walter Kröll, Former Chairman of the DLR Board for several years.

DLR has long been using its special expertise and facilities to provide data and data products during crisis situations, which help humanitarian assistance, in particular, to be guaranteed. In a previous blog post, I described a discussion I had with the German Federal Minister of the Interior, Thomas de Maizière. Since then, a few weeks have gone by. We have, in that time, intensively continued the activities we discussed and have taken the first steps towards a creating a permanent institutional framework for them.

The German Economics Minister, Rainer Brüderle, travelled across Asia for a week, presenting German economic policy in China and Japan, and promoting cooperation between these countries and Germany. The delegation included journalists and a number of experts on the economy who either had special relationships in the region or were interested in acquiring them. As the representative of DLR, I had a special role within the group, and this became increasingly apparent over the course of the trip.

DLR’s new satellite data receiving station in Inuvik, northwestern Canada, was officially inaugurated on 10 August 2010. Representatives of several Canadian space and political organisations travelled to Inuvik for the event, as did we from DLR. The beautiful weather seemed tailor-made for celebrating the cooperation between Canada and Germany, and the event closed with an enjoyable reception.

The now 100-year-old Berlin Air Show (ILA) was a great success overall for DLR. Agreements were signed, contacts were maintained and re-established, and DLR showed off its achievements in the exhibition hall and on the showground. The long hoped-for summer weather guaranteed the success of ILA but was, at the same time, something of a physical burden for the staff. For me, as DLR Chairman, it was simply great to present DLR's achievements to a broad audience.

On 6 June 2010, the President of the University of Alabama in Huntsville, David Williams, and the previous NASA administrator, Mike Griffin, visited Rostock. They came to discuss possible forms of collaboration with the University of Rostock and DLR, and also to visit Peenemünde. In the company of Henry Tesch, the Science Minister of the German state of Mecklenburg-Vorpommern (Mecklenburg-Western Pomerania) and the Rector of the University of Rostock, Wolfgang Schareck, we visited Peenemünde and the Historical-Technical Museum located there.

The period of office for the current ESA Director General, Jean-Jacques Dordain, ends in 2011. Because so far only one German, Reimar Lüst, has been director general of the European Space Agency since its inception, it seems fairly obvious for a German candidate to be in the running for the forthcoming election of a successor. Preliminary discussions with all ESA member states confirmed that a German candidate would have very good prospects.

Two days after the successful flight of DLR's Falcon research aircraft, the airspace over Germany has been re-opened. Admittedly, the Eyjafjallajökull volcano is still ejecting lava and ash, but the German weather service (DWD), the German air traffic control organisation (DFS) and the German Federal Ministry of Transport (BMVBS) have authorised flights again on the basis of current weather data. DLR has carried out two more flights after requests from the authorities, and the dust has settled, or – to be more precise – has moved on.

After air traffic over Europe largely came to a standstill on Friday, and the public is increasingly discussing the question of how to judge the situation. At the same time, responsibility, expertise and effective actions in a problematic situation are confused.

As of today, nearly all Europeans know that Iceland has active volcanos, and some are even familiar with the name Eyjafjallajökull. The consequences of the eruption have paralysed air traffic over a wide area. DLR was able – as were its partner organizations, NASA and ESA – to use its expertise and access to appropriate satellite data to inform the public about the extent of the problem.

This entry doesn’t deal with the usual bustle in and around DLR; it is quite simply about a few days of vacation on an East Frisian island and the special opportunity it provided to harmonise relaxation and work.

On 24 March 2010, Alan Bean, the fourth man to walk on the Moon as part of the Apollo programme, visited the Gasometer in Oberhausen. Apart from the personal encounter (it was my third meeting with an Apollo astronaut, and they have always impressed me), I had the chance to be in the presence of an enthusiastic and motivating witness to an incredible pioneering feat, someone whose lecture revealed far more than a just report of an extraordinary mission.

On 1 March 2007, I assumed the post of Chairman of the Management Board of the German Aerospace Center, DLR, and in doing so, embarked upon a personal change in career of unimagined and unexpected magnitude. The first three of five years in this post are now behind me and it is time to do something akin to drawing up a personal balance sheet, to prepare myself for the decisions and developments required in the future.

At the Science and Technology Day at the Berlin-Brandenburg Science Academy (Berlin-Brandenburgischen Akademie der Wissenschaften; BBAW), lectures were given on the subject of development in nature and technology. I was invited to present a paper dealing with evolution and revolution in aerospace technologies. This was, as my preparation showed me, a very exciting challenge indeed …

I had planned to use the launch of the shuttle Endeavour with the European elements Node 3 and Cupola to intensify personal contacts with various participants in the space sector. The focus of our talks was on the current mission, of course, but they also addressed issues such as the procurement of Meteosat Third Generation and the Obama administration’s plan for space in the coming years, published a week ago.

Because of NASA's achievements, the United States continues to be regarded as the most important and strongest nation with regard to space. Until now, the relationship with other countries, including Germany, has been characterised by the fundamental view that all American missions should be realised using American expertise on the critical path. The future role of partners was a central subject during the visit by Charles Bolden.

A very special experience: I had the opportunity to observe at first hand the work of DLR's staff on Solar Impulse, Bertrand Piccard and André Borschberg's project to circumnavigate the world in a solar-powered plane.

My blog as Chairman of DLR has been set up to communicate internally and externally, focusing not only on general topics but also giving more personal insights. With this in mind, here, at the turn of the year, is the first article.