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Method for confirming one-way distance in satellite laser ranging (SLR)

A technology of satellite laser ranging and laser ranging, which is applied in measuring devices, re-radiation of electromagnetic waves, radio wave measurement systems, etc., can solve problems such as distance values ​​not meeting requirements

Active Publication Date: 2010-12-15
YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

Obviously, the distance values ​​mentioned in the previous two ranging models do not meet the requirements

Method used

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  • Method for confirming one-way distance in satellite laser ranging (SLR)
  • Method for confirming one-way distance in satellite laser ranging (SLR)
  • Method for confirming one-way distance in satellite laser ranging (SLR)

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Embodiment Construction

[0067] 1. Use the satellite laser ranging telescope to obtain artificial satellite SLR data, that is, a series of (t 3 , t 1 )Observations.

[0068] 2. For the observed value (t 3 , t 1 ) for data preprocessing, the data preprocessing method is as follows:

[0069] let t i The observed and calculated values ​​of the satellite distance at each moment are ρ O (t i ), ρ C (t i ), the residual is

[0070] Δρ i = ρ O (t i )-ρ C (t i )

[0071] First, a polynomial with time as the independent variable is fitted to Δρ i (t), namely

[0072] Δ ρ i ( t ) = a 0 + a 1 t i + a 2 t i 2 + . . .

[0073] The undetermined coefficient a can be obtained by the least sq...

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Abstract

The invention relates to a method for confirming one-way distance in satellite laser ranging (SLR), which comprises the following steps of: acquiring SLR data by utilizing an SLR telescope; and calculating relatively accurate uplink or downlink distance in laser ranging by utilizing a measurement value. Particularly, when a track is confirmed by using single-station ranging and angle measurement, a complete vector having accurate length (ranging value) and accurate direction value in space is needed, and the calculating method of the invention is quite applicable. In short, the method for calculating the one-way distance is more explicit in physical significance and clearer in space geometry.

Description

technical field [0001] The invention relates to a method for determining one-way distance in satellite laser ranging. Background technique [0002] Satellite Laser Ranging (SLR) work has been carried out for more than 40 years. SLR technology measures the distance between the laser and the satellite by measuring the round-trip time between the ground and the satellite. SLR can calculate the absolute distance with only a single measurement. It has technical characteristics such as measurement accuracy and the measured distance. With the continuous accumulation of SLR observation data, SLR technology has been widely used in the fields of geodynamics and geodesy. Regarding how to use the measured value to establish the analytical expression of the measurement geometry between the station and the satellite, in some works that describe the use of laser ranging data to determine the satellite orbit, two laser ranging models are listed, namely, the instantaneous laser ranging mode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08
Inventor 李语强李荣旺冯和生熊耀恒
Owner YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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