TRIS Online Record

Title	A RECEPTION OF IMAGES FROM GMS ON BOARD BY A SIMPLE TRACKING ANTENNA
Accession No	00698396
Authors	Chiba, H; Yasuda, A
Publication Date	19900000
Languages	Japanese
Abstract	A simple, two-axis controlled satellite tracking antenna for vessels, which has been designed by the present authors originally for satellite broadcasting, is applied to the reception of images from the geostationary meteorological satellite (GMS) onboard. Instead of an expensive vertical gyroscope, small and inexpensive pendulum-type inclinometers are used as sensors for rolling and pitching, which require some adjustment of the obtained values. A rather small parabolic antenna of 0.75m in diameter is used to lighten the load due to wind pressure. The allowable angular error increases, though carrier power at the receiver decreases owing to the reduced aperture area. The nominal value of noise figure of the preamplifier is 1.8 dB. The device was tested for receiving images on a ship in the Pacific Ocean. It was proved that the images received by the device were satisfactory in the vast area with elevation angle down to 30 degrees covering Sakhalin in the north and New Zealand in the south.
Supplemental Information	Japan Inst Navigation J, v 82 March 1990, p 129 [9 p, 7 ref, 4 tab, 7 fig]
TRT Terms	Navigational satellites
Other Terms	Maritime satellites; Satellite meteorology
Document Source	British Maritime Technology Source Data: 90092178
TRIS Files	MRIS
Database	TRIS Online

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