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Publisher DOI: 10.3390/electronics7090191
Title: Possibilities of increasing the low altitude measurement precision of airborne radio altimeters
Language: English
Authors: Labun, Ján 
Krchňák, Martin 
Kurdel, Pavol 
Češkovič, Marek 
Nekrasov, Alexey 
Gamcová, Mária 
Keywords: airborne radio altimeter;methodological error;increase of measurement accuracy;height pulses;dual-channel method
Issue Date: 11-Sep-2018
Publisher: MDPI
Source: Electronics (Switzerland) 9 (7): 191- (2018-09-11)
Journal or Series Name: Electronics 
Abstract (english): The paper focuses on the new trend of increasing the accuracy of low altitudes measurement by frequency-modulated continuous-wave (FMCW) radio altimeters. The method of increasing the altitude measurement accuracy has been realized in a form of a frequency deviation increase with the help of the carrier frequency increase. In this way, the height measurement precision has been established at the value of ±0.75 m. Modern digital processing of a differential frequency cannot increase the accuracy limitation considerably. It can be seen that further increase of the height measurement precision is possible through the method of innovatory processing of so-called height pulses. This paper thoroughly analyzes the laws of height pulse shaping from the differential frequency presented by the number that represents the information about the measured altitude for this purpose. This paper presents the results of the laboratory experimental altitude measurement with the use of a so-called double-channel method. The application of obtained results could contribute to the increase of air traffic safety, mainly in the phase of the aircraft approaching for landing and landing itself.
DOI: 10.15480/882.2349
ISSN: 2079-9292
Institute: Hochfrequenztechnik E-3 
Type: (wissenschaftlicher) Artikel
Appears in Collections:Publications (tub.dok)

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