TanDEM-X Blog

The face of the Earth

20.08.2010

For a month now, we have been acquiring altitude models with the TanDEM-X and TerraSAR-X satellite pair. Already, over 1000 products have come out of our operational processing chain. Alongside many test images, some of the data also give an insight into how humankind has shaped the surface of the Earth – and how the highs and lows around them have determined the course of their lives. read more

Processing of first TanDEM-X data received at Inuvik

19.08.2010

Erhard Diedrich, in charge of the building of the Inuvik satellite station, returned from Canada with his colleagues, a happy man. The inauguration on 10 August was not only moving, but also marked the end of a successful first checkout phase. Over 300 passes of data have been acquired since April this year, among them 60 from the TanDEM-X satellite. read more

Inauguration of the DLR ground station in Inuvik

12.08.2010

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. read more

TanDEM-X answers its first call for crisis assistance

06.08.2010

Satellite data is an indispensable tool for quickly assessment of the situation in cases of natural or environmental disasters and for guiding emergency teams on ground. DLR's 'Center for Satellite Based Crisis Information' (Zentrum für satellitengestützte Kriseninformation; ZKI) and many other international organizations have been using the German radar satellite TerraSAR-X for three years to rapidly obtain reliable data in all weather conditions for such crisis situations. Now, our new satellite, TanDEM-X, has also provided assistance for the first time in a crisis – gathering information on the flood catastrophe in Pakistan. We were able to help not only with radar images but we also used TanDEM-X for interferometry in formation with TerraSAR-X for the first time. This has provided a more reliable technique to map floods instantaneously and more accurately, in one pass and without the need for archived data. read more

Höhendatensatz: Vulkan Longonot in Kenia

TanDEM-X ground segment kicks off!

02.08.2010

The successful setup of the 'wide' flight formation between the TerraSAR-X and TanDEM-X satellites marked the beginning of the 'TerraSAR-X Add-On for Digital Elevation Measurements' mission in its literal sense: Now, with both satellites flying as a team – three seconds apart – and seeing the same region of the Earth's surface, tricky instrument commanding is no longer needed to acquire interferometric data sets. Ordering, planning and commanding of the synchronous acquisitions, as well as reception and, in particular, processing of the data sets from both satellites are performed completely automatically. read more

The first 3D experiment

22.07.2010

It was during a sleepless night, with hardly any drop in the midsummer temperatures, when the idea for a radar experiment with both satellites, TerraSAR-X and TanDEM-X occurred: “What if we could prove that interferometry is possible with two satellites even before the final formation is reached?” read more

DLR Bodenstation Neustrelitz

Approach in orbit; busy times in Neustrelitz

16.07.2010

Tirelessly, TanDEM-X is acquiring data while moving ever closer to the TerraSAR-X satellite. As yet, the first flight formation is not set up and thus no interferometric processing is possible. All data received by the TanDEM-X ground station network are transferred to Neustrelitz, where they are processed into SAR images like the operational ones from TerraSAR-X. read more

Stress tests in space and rivers of sand

14.07.2010

As ground teams prepared for the formation flight of TanDEM-X and TerraSAR-X, TanDEM-X was put through its paces in the last week before approach. The instrument team ran a set of hot/cold tests to check the instrument’s performance limits by first allowing the radar system to cool down and then running it at full load. This was followed by tests in which a large number of randomly targeted radar images of the Earth’s surface were used to test the reliability of the reception and processing systems. The images acquired during these tests include a number of very puzzling pictures. read more

Art in space – or, how to set up a formation

12.07.2010 | posted by Ralph Kahle

On its launch date, 21 June 2010, roughly 16,000 kilometres separated TanDEM-X from its twin satellite, TerraSAR-X. Now, that distance has shrunk to just 2000 kilometres. The time has come for the relative movement between the two satellites to be slowed down, and for them to be set up for formation flying. To accomplish this, the Flight Dynamics Group at the German Space Operations Center (GSOC) will carry out a total of 10 orbital manoeuvres over the next eight days. read more

TanDEM-X High Resolution Spotlight Preview

TanDEM-X's first zoom and wide-angle images

30.06.2010

Now that in addition to control and mission planning, the Kiruna and Neustrelitz ground stations have also taken on important elements of the normal operation of the ground segments as part of commissioning, the various radar modes of the TanDEM-X are undergoing instrument and processing tests. This includes the high definition ‘Spotlight’ zoom mode and the ‘ScanSAR’ wide-angle mode. read more

TanDEM-X images under the magnifying glass – first data is perfect

26.06.2010

While TanDEM-X spent mission days four and five catching up to its twin – TerraSAR-X – which is hurrying on, 13 000 kilometres ahead, it continued to acquire numerous test images. These will be analysed by the team and compared with previously processed TerraSAR-X images to tune the processing chain to suit the new instrument. read more

TanDEM-X Blog

Uncanny but true – “Everything is running like clockwork”

24.06.2010

The fourth mission day has dawned, and so far everything is running like clockwork. It sometimes seems almost uncanny to us, and an occasional funny remark about our now being able to slowly turn off the simulator makes the rounds. But in reality, we are obviously very pleased and happy about ‘our’ TanDEM-X. Because everything is running so smoothly, we are able to complete our activities earlier than planned and have even been able to slightly shorten our original timetable, so that we will have less need for a night shift. read more

TanDEM-X Blog

Commissioning of the radar instrument – everything still ‘green’

24.06.2010

The commissioning of the satellite went smoothly. Now, the radar instrument team must start their work. Each of the electronic units that make up the radar must be turned on one by one and tested. The instrument telemetry, received at the ground stations in Weilheim (Germany), O'Higgins (Antarctica), Svalbard (Spitsbergen, Norway), and St. Hubert and Saskatoon (Canada), will be sent to the control room in Oberpfaffenhofen for evaluation. read more