Menetelmä ja laitteisto vaaka- ja pystykanavan kalibroimiseksi kaksoispolarisoidussa säätutkassa

The present invention relates to a method and apparatus for calibration of horizontal (H) and vertical (V) channels in a dual polarized weather radar. The goal of the invention is accomplished by placing an secondary feed (10) in center of the antenna dish (8) opposite to the primary feed (9) of the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ANDERSSON,HENRY, SALMIVAARA,JUHA, KARHUNEN,PENTTI
Format:	Patent
Sprache:	fin ; swe
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	The present invention relates to a method and apparatus for calibration of horizontal (H) and vertical (V) channels in a dual polarized weather radar. The goal of the invention is accomplished by placing an secondary feed (10) in center of the antenna dish (8) opposite to the primary feed (9) of the radar antenna. A low power signal on the radar's operating frequency is fed to the secondary feed (10) and transmitted towards the primary feed. The calibration signal is received normally by H- and V-channels (4), (5) of the radar receiver and differences observed between the channels are used as calibration information for actual weather echoes. The secondary antenna can also be used for reception of the high power signal of the radar to calibrate the transmission channels of the radar.