The report reviews the existing lidar methods and systems for measuring the wind speed vector. Examples of the successful application of Doppler systems are given and the choice of fiber technologies for constructing laser meters for wind speed and direction.
The article describes instruments for measuring the height of the cloud base, which are widely used in meteorology, especially as meteorological support for aerodromes. It is noted that there is no single method by which the height of the lower cloud boundary is determined. The methods of processing signals for determining the height of the lower cloud boundary (applicable for automatic recording mode) are presented.
The article represents the description the problem of calibration meter height of cloud base in registration mode, multiple layers of clouds. The article provides an analysis of points of views of researchers on the possibility of creating a compact device to simulate several layers of clouds in the calibration meter height of the cloud base. The authors propose an original way to use fiber optic technology to simulate several layers of clouds. The paper describes the key benefits and features of this solution, as well as restrictions on the possibilities of its use.
The paper deals with the problem of maintaining job opportunities optoelectronic devices in applications that require heating protective glasses. The author gives a comparison of different methods of heating for their efficiency and complexity in the design and manufacture of space heaters, as well as analyzes the characteristics of the products in the manufacture of both heaters and protective glasses themselves. This review will be of interest to designers and developers in the field of modern optoelectronic devices and systems with a wide range of temperatures during operation.
The paper deals with the problem of obtaining weak signals in terms of background noise and the possibility of reducing the influence of outside lighting probed volume nephelometer. The author offers a variety of ways: the use of the design features of a nephelometer, the restriction of the field of view of the system, the installation of hoods, the installation in the construction of light absorbers, the use of modulation of illumination, circuit solutions in the receiving part (active and passive filters), hardware and software solutions for the subtraction of the background portion of the signal from the received signal based on the previous state of the optoelectronic tract.
The paper summarizes the experience to create the counting of the registration system pulse avalanche photodiode. The authors suggested a technical solution that allows the hardware to carry out registration in both analog and in the photoelectron pulse registration regime. The paper substantiates the idea of how the use of modern microcontroller solutions, provides a flexible registration system with user-defined time parameters (or probe pulses) accumulation start timing cutoff near zone, sensing range, signal range resolution. Such a view would be of interest to specialists in the development of devices for receiving signals in lidar systems.
In this paper we are talking about the possibility of increasing the accuracy of measurements of turbidity meter. The article analyzes the requirements of the light source being probed volume, as well as in calibration mode. Use as a pulsed light source of high power LEDs, collimator requires optimization which is devoted to this work. The main factor limiting the possibilities for creating the desired collimator are the dimensions of both the collimator, the one and only device. Considerable attention is paid to the uniformity of light-probed volume nephelometer.
The article is devoted to the optimization of the parameters of the meter of the height of the cloud base. The authors reveal the problem and possible ways to improve meter of the height of the cloud base. Particular attention is paid to improving the functioning of the device without changing the material base. Based on the analysis is determined by the wishes of the consumers' needs for additional product options.
The article seeks to examine the possibility of calibration of the compact meter of meteorological visibility range, methods other than the method of direct comparison. During the analysis, authors for the first time in the literature show that it is possible to use formazine for this, as a means for calibrating the meter of meteorological visibility IMDV).
In this article were consider problems of calibration and verification of a portable meter of height of the cloud base. We analyzed the characteristics of the operating conditions of calibration kits. Was reveal and provided the possibility of developing methods for the use of a compact calibration device. Based on the study, the authors proposed a technical way of implementation, formulated the basic characteristics, the sources and extent of error.
Developed and tested a simplified version of the definition of the cloud base height of the backscatter signal obtained in the laser meter height of the cloud base with eye-safe level of radiation intensity.