In connection with this, representatives of the Galileo project attended the recent 21st annual Joint Committee Meeting of COSPAS-SARSAT, the international programme for satellite-aided search and rescue.
The partners in Galileo are committed to developing the Galileo search and rescue component as an integral part of MEOSAR, the future worldwide search and rescue satellite system.
Galileo joined the meeting in a formal capacity as a major contributor to the MEOSAR programme, following the signature of the 'Declaration of Intent to Cooperate on the Development and Evaluation of MEOSAR'. MEOSAR, which stands for Medium Earth Orbit Search And Rescue, is a programme to equip satellites that operate in medium-Earth orbits with payloads that receive signals from distress beacons on Earth. These signals are then relayed to rescue organisations, giving them the location of the emergency.
COSPAS-SARSAT already has systems operating in low-Earth orbit and geostationary orbit. The low-Earth orbit satellites can determine the location of emergency beacons using the Doppler effect as they pass overhead. However, there is a delay in relaying the distress signal because the satellites can only 'see' a part of the Earth's surface at any given time and a beacon is only detected when the satellite passes nearly overhead. Also, the satellites have to store the location of the emergency and transmit it to a ground station once one comes into in range, causing a further delay.
Search and rescue transponders on geostationary satellites can constantly view a large, fixed area of the Earth, thereby eliminating the time delay in detecting distress signals. However, they are not able to automatically determine the location of the distress beacon as the low-Earth orbit system does. They have to rely on the beacon to use a navigation system to find its position and include it in the distress call.
Emergency beacons need to have a direct line-of-sight to the geostationary satellites. There are some situations where this is impossible, such as near the Earth's poles, where the satellites are too low in the sky to be usable, or when an accident happens on the 'wrong' side of a mountain or in a deep valley, and the surrounding terrain obscures the satellite.
To further improve the performance of the overall COSPAS-SARSAT system, plans are now being made to fly search and rescue payloads on future navigation satellites. The various navigation satellite constellations will each have about 20 to 30 satellites in medium-Earth orbit, providing global coverage, including at the Earth's poles, and with multiple viewing angles to the satellites, eliminating terrain blocking.
The Galileo search and rescue component will provide two services. The Forward Link Alert Service, fully backward compatible with the current operational COSPAS-SARSAT components and interoperable with all other planned MEOSAR elements, detects activated distress beacons and notifies the appropriate rescue body. A novel service, known as the Return Link Service, will send a return message to the emergency beacon, notifying the emergency victims that their distress signal has been received and help is on its way.
The Galileo In-Orbit Validation Programme, which will have four satellites fitted with search and rescue transponders, will demonstrate the Galileo MEOSAR services.
Galileo is a joint initiative between ESA and the European Commission. When fully deployed in the early years of the next decade, it will be the first civilian positioning system to offer global coverage.
Dominique Detain | alfa
Ultra-precise chip-scale sensor detects unprecedentedly small changes at the nanoscale
18.01.2017 | The Hebrew University of Jerusalem
Data analysis optimizes cyber-physical systems in telecommunications and building automation
18.01.2017 | Fraunhofer-Institut für Algorithmen und Wissenschaftliches Rechnen SCAI
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences