In the last few years, the Fraunhofer Institute for Laser Technology ILT has been developing satellite-based laser beam sources for climate research. The project »ALISE« (Diode-pumped Alexandrite Laser Instrument for next generation Satellite-based Earth observation) started in August 2016 and will run until July 2018. In cooperation with the Leibniz Institute for Atmospheric Physics (IAP) and Airbus Defence & Space, the Fraunhofer ILT will be investigating the technical feasibility and the possible applications of a novel laser system for satellite-based observation of the world's climate.
The fight against global climate change poses one of the greatest challenges of the coming decades. To develop effective measures against global warming, scientists need climate models that reliably represent interrelationships in the atmosphere. Currently, there is insufficient data about such relationships at high altitude (mesosphere), where crucial processes for global air circulation occur.
For the measurement of temperature and wind speed at this altitude, climate researchers rely on the modern resonance-lidar process. However, due to the complexity and the weight, these laser measuring systems are being used almost exclusively on the ground.
The work in ALISE constitutes the first step in developing a satellite-based observation system that enables wind and temperature conditions to be measured temporally and spatially in high-resolution in the mesosphere.
To accomplish this, the efficiency of the laser beam source, an alexandrite laser, needs to be increased by using laser diodes as a pump source. Furthermore, complexity and component weight will be reduced so that the requirements for space-based missions can be met.
In order to take advantage of laser measurement technology in satellite-based Earth observation, the scientists from Aachen have applied their many years of experience and expertise to developing laser beam sources and optical components for atmospheric measurements.
They were already able to demonstrate this, among others, in the Franco-German climate mission »MERLIN« and the »CHARM-F« project. The CHARM-F system recently successfully completed its first flight on the German research aircraft HALO (High Altitude and Long Range Research Aircraft) of the German Aerospace Center (DLR).
ALISE is supervised by the DLR, while the project budget is entirely provided by the Federal Ministry of Economic Affairs and Energy (FKZ: 50RP1605).
Please visit the DLR-website for additional information about the ALISE project: www.dlr-innospace.de/startseite/gefoerderte-projekte/alise/
Dr. rer. nat. Michael Strotkamp
Nonlinear Optics and Tunable Lasers Group
Phone +49 241 8906-132
Dipl.-Ing. Hans-Dieter Hoffmann
Head of the Competence Area Lasers and Laser Optics
Phone +49 241 8906-206
Petra Nolis | Fraunhofer-Institut für Lasertechnik ILT
A sensor system learns to "hear": Reliable detection of failures in machines and systems
05.12.2018 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
Thick metal sheets? Laser welding!
30.11.2018 | Laser Zentrum Hannover e.V.
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.
Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...
Scientists at the University of Stuttgart and the Karlsruhe Institute of Technology (KIT) succeed in important further development on the way to quantum Computers.
Quantum computers one day should be able to solve certain computing problems much faster than a classical computer. One of the most promising approaches is...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
12.12.2018 | Health and Medicine
12.12.2018 | Physics and Astronomy
12.12.2018 | Health and Medicine