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Weighted average temperature calculation method applicable to low latitude regions in China

A technology of weighted average and calculation method, applied in the field of global navigation system and meteorology, can solve problems such as systematic deviation, and achieve the effect of eliminating systematic deviation

Active Publication Date: 2017-09-19
SOUTHEAST UNIV
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Problems solved by technology

However, the Bevis formula was established using radiosonde data in the United States. Since Tm has latitude and seasonal changes, there will be obvious systematic deviations when it is applied to other regions

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  • Weighted average temperature calculation method applicable to low latitude regions in China
  • Weighted average temperature calculation method applicable to low latitude regions in China
  • Weighted average temperature calculation method applicable to low latitude regions in China

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Embodiment Construction

[0022] The technical solution of the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0023] This specific embodiment discloses a weighted average temperature calculation method suitable for low-latitude regions in China, including the following steps:

[0024] S1: Construct a weighted average temperature ITm model suitable for low-latitude regions in China, and the expression form of the ITm model is IT m =a 0 +a 1 T s +a 2 φ+a 3 h, IT m is the weighted average temperature, T s is the surface temperature, φ is the latitude of the station, h is the elevation of the station, a 0 、a 1 、a 2 and a 3 is the coefficient of ITm model;

[0025] S2: Using the air sounding meteorological data at the station to calculate the approximate true value T of the weighted average temperature at the station m ;

[0026]

[0027] In formula (1), e i The average water vapor pressure of the i-th layer of th...

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Abstract

The present invention discloses a weighted average temperature calculation method applicable to the low latitude regions in China. The method comprises the following steps: S1: constructing a weighted average temperature ITm model applicable to the low latitude regions in China; S2: calculating the approximate true value Tm of the weighted average temperature at the observation station by using the adiosonde data at the observation station; S3: using the approximate true value Tm of the weighted average temperature obtained in the step S2 to determine values of the coefficients a0, a1, a2 and a3 of the ITm model by using the least squares method; and S4: according to the established ITm model, calculating the weighted average temperature ITm by using the ground temperature Ts of the observation station, the observation station latitude phi, and the observation station elevation h. According to the method provided by the present invention, the correction items of the latitude and the elevation are added based on the Bevis model, the change regulation of weighted average temperature is more in line with, systematic deviation of the Bevis model in China is eliminated, accuracy for calculating the weighted average temperature in the low latitude regions in China by using the method provided by the present invention is better than the accuracy by using the Bevis model.

Description

technical field [0001] The invention relates to the fields of global navigation system and meteorology, in particular to a weighted average temperature calculation method suitable for low-latitude regions in China. Background technique [0002] Water vapor is the most active, most unstable and most difficult to obtain accurately a meteorological parameter in the atmosphere. Water vapor has an important influence on signal propagation, energy transport, cloud formation and precipitation in the atmosphere. The study of water vapor and its changes has always been an important topic in the research of meteorology and GNSS signal propagation. Ground-based GNSS retrieval of atmospheric precipitable water is a new method to measure atmospheric water vapor content and temperature using GNSS signals. In the process of converting zenith tropospheric wet delay to atmospheric precipitable water, it is very important to determine a quantity, which is the conversion coefficient. The ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 胡伍生夏晓明韩理想
Owner SOUTHEAST UNIV
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