It would appear that there are radars, land-based services and so on – why is it that aircraft and helicopters continue to crash, especially during take off and landing at aerodromes in mountainous regions?
There are several reasons. One is the insufficiencies of existing air traffic control systems: they do not always allow flight control at low altitudes or in regions that are hard to access for observation, that is airstrips that do not appear on a radar field. Furthermore, faults are also possible on boundaries of interacting systems. It is namely this, in conditions of an ever growing intensity of air travel, that leads to the number of dangerous near misses of aircraft and helicopters with mountain slopes constantly increasing, even in conditions of good visibility.
In this situation it is quite clear that people, that is, pilots and dispatchers, need the help of machines. There must be devices that, in any weather, and this is most important, would detect that the flight is in a direct course for a mountain and which would either send a signal to the pilot or send the appropriate command to the autopilot. Alas, no individual or major corporation has to date been able to make such devices. However, a breakthrough has been noted: scientists from the Samara State Technical University and their neighbours from Ekran have recently proposed a solution to the problem. And a very realistic solution it is, too. They have already patented and are now researching a system to prevent accidental collisions of aircraft and helicopters with mountainous terrain. Experts from the International Science and Technology Centre have placed information on this development on their website, in the Promising Research section.
The essence of this solution is that the scientists were able to overcome the so-called “paradox of mountainous terrain”, where a Doppler shift of the frequency of the total signal (dependence of the frequency of the radio signal on the speed of its source) at the output of the radar is identical both in flight over a mountain slope and in flight over a flat terrain. Leaving to one side the technical and theoretical explanations of this phenomenon, we shall note only that the authors from Samara have devised a way to overcome this paradox and they have been able in one device to use two methods to determine the spatial-temporal parameters of the aircraft – the impulse radar parameter and the Doppler parameter. A special computer with specially developed software enables the analysis of these data, the detection of the mountain slope accordant to the course of the aircraft, evaluation of the steepness of the slope and the distance remaining to it. In other words – this is the recognition, to a high degree of probability, of a natural obstacle and the instantaneous warning of the pilot of the fact or the issuing of a command to alter the aircraft’s course.
“It should be said that our team, specialists from the Samara State Technical University and Ekran previously fulfilled a similar project, and successfully, too,” explains a project participant and Head of the Research and Experimental Department of Research Institute Ekran, Yuri Golubev. “We developed a system to prevent the collision of automobiles, travelling in a string, in conditions of very poor visibility, including at night in blackout conditions. We also developed radar for automobiles that informs the driver of the critical distance to the car travelling in front, with account of the absolute speed of travel, speed of convergence and the condition of the road. Of course, with aircraft the speeds are different, but we know how to make this declared system. And we already have the required experience, and the technical and theoretical run of work. The matter is now down to financing.
Andrew Vakhliaev | alfa
21.08.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau
AI implications: Engineer's model lays groundwork for machine-learning device
18.08.2017 | Washington University in St. Louis
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
23.08.2017 | Life Sciences
23.08.2017 | Life Sciences
23.08.2017 | Physics and Astronomy