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Calibration method for pure rotational Roman laser radar system constants

A laser radar and Raman laser technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as inconvenience of operation, errors, and difficulties, and achieve the effect of improving convenience, avoiding differences in time domain changes, and improving application popularity.

Inactive Publication Date: 2015-07-29
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

At present, the calibration scheme adopted by the atmospheric temperature lidar system constants is to use radiosondes for vertical calibration regularly, but due to the high cost of balloon sounding and the inconvenience of operation, it is difficult for lidar to frequently use radiosondes for calibration correction
At the same time, the air traffic control department has strict time domain and air domain regulations for the release of sounding balloons, and it is difficult to implement this test.
The lateral drift of the sounding balloon in the air is relatively serious. At this time, the temperature profile obtained by the radiosonde is no longer a vertical profile in the strict sense. There is also a certain error in the calibration of the lidar temperature system constants, which will affect the accuracy of the lidar. application
The limitations of the calibration method greatly limit the practical application of atmospheric temperature lidar

Method used

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  • Calibration method for pure rotational Roman laser radar system constants
  • Calibration method for pure rotational Roman laser radar system constants
  • Calibration method for pure rotational Roman laser radar system constants

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Embodiment Construction

[0020] Such as figure 1 As shown, a calibration method of pure rotational Raman lidar system constants, the steps are as follows:

[0021] Step 1: On a clear and cloudless night when the temperature difference exceeds 5 degrees Celsius, use the laser radar 1 to perform horizontal detection through the scanning system 2 to ensure that there are no obstacles in the transmitting and receiving beams 3;

[0022] Step 2: placing a temperature measuring instrument 4 on the horizontal detection path of the laser radar 1;

[0023] Step 3: After debugging the laser radar 1 signal, measure the laser radar 1 and the temperature measuring instrument 4 at the same time to obtain a series of time series data: P low (t i ), and T Tmeter (t i ), where P low (t i ),, P high (t i ) and T Tmeter (t i ) respectively represent at t i Place the laser radar 1 low-order channel signal, high-order channel signal and temperature data measured by the temperature measuring instrument at the p...

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Abstract

The invention discloses a calibration method for pure rotational Roman laser radar system constants. The method includes that a laser radar performs horizontal detection through a scanning system, a temperature measuring meter is placed nearby a laser radar level detection path, and the laser radar and the temperature measuring meter performs detection simultaneously. Signals detected by the laser radar and the temperature measured through the temperature measuring meter are matched. When number i of times of horizontal data measurement is greater than number k of the system constants, full system constants of the pure rotational temperature measuring laser radar can be calculated. The laser radar system constants can be calibrated by acquiring horizontal Roman scattering signals and temperature measuring meter data close to the ground by the aid of the pure rotational Roman laser radar, time-domain variations calibrated by a conventional air observation balloon are avoided, convenience in the calibration method is improved, application population of the laser radar is greatly improved, inversion accuracy is high, application range is wide, and applicability of the pure rotational Roman laser radar is improved.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a calibration method of pure rotational Raman laser radar system constants. Background technique [0002] Atmospheric temperature is an important meteorological parameter in atmospheric physics, weather forecast and atmospheric environment research. At present, the more commonly used methods are balloon sounding, satellite inversion and lidar detection. The advantages of lidar in detection accuracy and spatial resolution, as well as the characteristics of continuous measurement and directional measurement, have attracted more and more attention from scientific and technical personnel. At present, the calibration scheme adopted for the atmospheric temperature lidar system constants is to regularly use radiosondes for vertical calibration. However, due to the high cost and inconvenient operation of balloon sounding, it is difficult for lidar to frequently use radiosondes for c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497
CPCG01S7/497
Inventor 曹开法胡顺星时东锋苑克娥黄见
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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