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Method for real-time direction finding of base station antenna ultrashort baseline GNSS double antenna

An ultra-short baseline, base station antenna technology, applied in the field of heading measurement, can solve the problem of high equipment price

Inactive Publication Date: 2019-04-12
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the high price of the equipment used in this type of direction finding method, it is difficult to obtain a direction finding value with better accuracy if the low-cost navigation and positioning module and antenna use the above method

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  • Method for real-time direction finding of base station antenna ultrashort baseline GNSS double antenna

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Embodiment Construction

[0071] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0072] see Figure 1-Figure 3 , the invention discloses a method for real-time direction finding of base station antenna ultra-short baseline GNSS dual antennas, which specifically includes the following contents:

[0073] 1) Construct a double difference equation model

[0074] To calculate the observation requirements of the carrier heading in real time in a single epoch, the present invention adopts the double difference method, that is, the second difference is made between different satellites and different receivers by using the carrier phase observation data. When the antennas of two GNSS receivers are not far apart (within 1m), the propagation path of the signal of the same satellite to the receiving end is almost...

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Abstract

The invention discloses a method for real-time direction finding of a base station antenna ultrashort baseline GNSS double antenna. The two-dimensional pose of a carrier can be determined by measuringa vector fixed on the carrier. The vector that reflects the two-dimensional pose of the carrier can be formed when the antennas of two receivers are mounted on a rigid carrier. And the heading angleof the carrier can be calculated by accurately determining the direction and distance of the two ends of the vector in space. According to the method for the real-time direction finding of the base station antenna ultrashort baseline GNSS double antenna, the common errors of the satellite and the receiver are eliminated by constructing a double difference model to perform a global solution on thebaseline vector. The problem of the frequent replacement of a reference star is avoided by firstly solving the single-difference ambiguity between fixed stations. The reliability of the baseline vector is ensured by using the EKF solution. The single epoch can be guaranteed to be solved, the real-time performance is effectively ensured, and in particular, various errors in the observation of the low-cost positioning module and the antenna in the absolute positioning are prevented from affecting the receiver antenna and making the high-precision position difficult to obtain.

Description

technical field [0001] The invention relates to the field of heading measurement, in particular to a method for real-time direction measurement of base station antenna ultra-short baseline GNSS dual antennas. Background technique [0002] Heading measurement is a kind of attitude measurement technology, which can provide the attitude measurement data of the measured carrier in the two directions of azimuth and pitch. Traditional attitude measurement systems are mainly based on photoelectric attitude sensors (sun sensors, star sensors, infrared earth sensors, etc.), magnetometers, accelerometers, and gyroscopes. autonomy, but its shortcomings are also more obvious. The photoelectric attitude sensor is greatly affected by the external environment and is easily disturbed during the measurement process. The inertial navigation system based on magnetometers, accelerometers and gyroscopes has good autonomy characteristics, is less affected by external interference, and can measu...

Claims

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Application Information

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IPC IPC(8): G01S19/55
CPCG01S19/55
Inventor 肖厦沈朋礼成芳卢晓春
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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