نتایج جستجو برای: variometer
تعداد نتایج: 247 فیلتر نتایج به سال:
Using several lines of evidence we show that the scale values of the geomagnetic variometers operating in Helsinki in the 19th century were not constant throughout the years of operation 1844–1897. Specifically, the adopted scale value of the horizontal force variometer appears to be too low by ∼ 30 % during the years 1866–1874.5 and the adopted scale value of the declination variometer appears...
Variometer is a device that informs user about his/her vertical velocity. It is particularly useful in paragliding, hang gliding and other air sports. The device has to inform user about vertical velocity by sound. Ground position of user is important too, because of complex functions (e.g., computing flying range, altitude above ground) and after-flight evaluation. This paper deals with the ha...
Abstract Geomagnetism, similar to other areas of geophysics, is an observation-based science. Data agreement between comparative geomagnetic vector observations one the most important evaluation criteria for high-quality data. The main influencing factors affecting observational data are attitude angle, scale factor, long-term time drift, and temperature. In this paper, we propose a method base...
No other area of the German economy has developed so emphatically in the past ten years as that of business{related services. Regardless their growing importance, business{related services still play only a minor role in o cial statistics. Above all, o cial statistics do not provide up{to{date information on the state of the business cycle of this sector. In a situation where such quantitative ...
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