Articles for ""

to homepage
Space | 26. April 2017 | posted by Heinz-Theo Hammes

Double anniversary for SOFIA

SOFIA Take-off
Credit: NASA
SOFIA during take-off for the Functional Check Flight on 26 April 2007

The coming week will bring two occasions to celebrate with SOFIA. Just yesterday was the 40th anniversary of the virgin flight by SOFIA's 'flying base' on 25 April 1977: operating under the registration N536PA, the Boeing 747 SP flew for the former airline PAN AM, mainly on long-haul routes to Asia or South America. There are images of the aircraft in its original livery and a detailed history of the 21441-306 airframe.

And it was 10 years ago today, on 26 April 2007, that the Boeing took off for the first time with the SOFIA observatory on board, following extensive modification of the aircraft and the installation of a telescope and door system. read more

Space | 15. February 2017 | posted by Manuela Braun

Video: The flying observatory SOFIA

Credit: DLR (CC-BY 3.0)
The flying observatory SOFIA is rolled into the NASA hangar in Palmdale.

How does the flying observatory SOFIA work? What is infrared astronomy? What sets SOFIA apart from other space observatories, and what happens on a typical day in the air?

read more

Space | 24. January 2017 | posted by Fabian Walker | 1 Comment

Video: The flying observatory SOFIA

Credit: DLR (CC-BY 3.0)
SOFIA on the runway, being prepared for its night flight over the United States in Palmdale, California.

In Palmdale, USA, approximately 60 kilometres north of Los Angeles, is the home of the flying infrared observatory SOFIA. SOFIA takes off from here, expansively gazing into space as it flies across the night sky four days a week. read more

Space | 19. October 2016 | posted by Bernadette Jung

How researchers use the latest Earth observation data – Part two

Credit: DLR/NASA GSFC/Lee
Elevation model of the mangrove forest region in the Sundarbans

In the second part of the series on the TerraSAR-X and TanDEM-X Science Meeting in Oberpfaffenhofen, we present further applications for satellite data. This time, for example, biomass is determined with the help of 'Earth observers from space'. Up until Thursday, 20 October 2016, international scientists will use the congress to show their research results on satellite-based Earth observation and to exchange ideas.

High above the swamp

Wet, warm and salty – the perfect habitat for mangroves. These tropical trees only feel at home in seawater or the brackish water of rivers. Together with other water-loving plants and shrubs, they can spread across entire forests or swamps. They offer protection against land loss through coastal erosion along seaboards and act as buffers to block storm surges and tsunamis. Around the world, mangrove forests account for an expanse of roughly 150,000 square kilometres. This equates to an enormous quantity of biomass – plant constituents that act as natural carbon reservoirs and that influence the climate. But exactly how much biomass is stored in these forests? And what about the inaccessible areas? read more

Space | 19. October 2016 | posted by Bernadette Jung | 2 Comments

How researchers use the latest Earth observation data - Part one

KIOST inertial DEM
Quelle: DLR/KIOST/NASA GSFC
Elevation model of coastal area

Researchers from across the globe are in Oberpfaffenhofen for the TerraSAR-X and TanDEM-X Science Meeting. For four days, from 17 to 20 October 2016, they have the opportunity to present their results from the data acquired by the two Earth observation satellite missions and exchange information. Here, approximately 200 presentations give an overview of the latest research in satellite-based Earth observation. The radar data are used in various scientific fields, from climate research to geosciences to forestry, infrastructure planning and remote sensing methodology.

Covering the Science Meeting, the Space Blog presents some of the work presented. The short examples provided outline how the data of the German radar satellites support researchers worldwide. read more

Space | 28. September 2016 | posted by Fabian Walker | 1 Comment

#GoodbyePhilae: mosaic poster and goodbye video

Credit: DLR (CC-BY 3.0)
#GoodbyePhilae: mosaic poster generated from the 'postcards' sent to Philae

A few weeks ago we invited the public to say goodbye to the lander Philae on Comet 67P/Churyumov-Gerasimenko – the response was overwhelming! For some weeks, under the cross-platform hashtag #GoodbyePhilae, we collected the goodbyes you sent to Philae on Comet 67P. On Twitter and Instagram alone, the hashtag reached 47 million users – almost 7000 people around the world took part in the campaign to say farewell to the first man-made object to land on a comet. read more

Aeronautics | 01. September 2016 | posted by Fabian Locher

A day in the tropical sky

Flugplatz Togo
Credit: DLR (CC-BY 3.0)
The apron of the hangar – the Falcon is ready for more measurements

It is the middle of the night on the coast of West Africa. A team of sleepy aircraft technicians and atmospheric researchers exit the hotel lobby. The humidity hits them like a brick wall – it is already 25 degrees Celsius outside. Their departure for Gnassingbé Eyadéma Airport is scheduled at four AM sharp. The first motorcycles of the day thunder past the walls of the hotel complex. Today’s take-off is set for 09:30. But the chauffeurs are late – again.

At 04:30, two cars drive up along the beach promenade through the still quiet streets of Lomé, the capital city of Togo.

Credit: DLR (CC-BY 3.0)
En route to the hangar via Boulevard Du Mono.

Twenty minutes later, the group reaches their destination – a small hangar next to the international airport. Waiting for them, ready for use, is the Falcon 20E , a very reliable member of DLR’s fleet of research aircraft. read more

Other | 31. August 2016 | posted by Manuela Braun

Back in saturated air at sea level

Source: DLR (CC-BY 3.0)
Into the tube: after the descent, all test subjects in the study were given an MRI scan to examine their brains.

The altitude sickness study conducted in the Valais Alps has delivered a sizeable yield: almost 1500 vials containing blood samples from the test subjects, frozen in dry ice at minus 80 degrees Celsius, were transported from the Margherita Hut at an altitude of 4554 metres back down to the DLR Institute of Aerospace Medicine in Cologne. There are also just under 200 urine samples, 44 saliva samples and 66 blood counts. The test subjects themselves are also contributing 11 carefully kept 'journals', in which they noted the extent to which they felt symptoms of altitude sickness. Twenty-two measurements of the test subjects' blood pressure and another 22 revealing oxygen saturation levels in their blood are also included in the dataset. For investigator Ulrich Limper this means a detailed evaluation that will take over six months to complete.

Departure from the top station

The test subjects completed their morning ritual for the last time on Monday, 22 August: upon waking, they measured their blood pressure in a supine position and then hopped onto the scales. The investigator in the study drew blood one final time. And then, at 07:00, the first group set off across the glacier accompanied by a mountain guide, and headed for the cable car station in Punta Indren to travel from the vantage point at 1600 metres to the base of the valley. Meanwhile, the second group was busy packing the equipment left at the Margherita Hut: the ultrasound device, crates of samples tucked away in dry ice and luggage. Altogether, 600 kilograms had to be prepared for return transport by helicopter. read more

Space | 26. August 2016 | posted by Manuela Braun

Study routines with ice axe and crampon training

Credit: DLR (CC-BY 3.0)
Storing samples in the ice: first the test subjects use ice axes to create a shelf.

It is 04:00, and outside Margherita Hut the world is pitch black. The clocks of the test subjects in the altitude sickness study sound their alarms. As the first group of mountaineers leave their lodgings for climbing tours in the Valais Alps, the study participants are already busy delivering the first set of data: headaches, quality of sleep, nausea, dizziness. All of these are noted in a daily journal, graded on a scale according to severity. Then they reach for the blood pressure monitor and attach the clip that measures oxygen saturation in the blood to a fingertip. “We’ve all gotten used to it by now,” says DLR investigator Ulrich Limper. The same applies to the subsequent hop onto the scales. Each morning, test subjects record their bodyweight.

The first samples are collected at 04:30. The participants are asked to give blood, saliva and urine. When the samples are analysed at the DLR laboratory in Cologne, it will be important to determine whether protein molecules from the lungs have entered the bloodstream, and whether other protein molecules are present in the urine. These factors would indicate that the hypothesis of the study is accurate: when the body is exposed to reduced atmospheric pressure and a lack of oxygen, inflammation will form in the body that causes the blood vessels to become permeable, hence allowing fluid and proteins to seep from the vessels and into the surrounding tissue. read more