Occultation exploration system and method suitable for aerostat

A detection system and aerostat technology, applied in the field of space exploration, can solve the problems of low utilization rate of space resources, limited aerostats, and limited occultation events, etc., to improve the utilization rate of space resources, standardize low cost, and reduce system cost. effect of error

Pending Publication Date: 2018-12-21
CMA METEOROLOGICAL OBSERVATION CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing occultation detection system is limited by its own structure and can only receive the signal emitted by a single GNSS

Method used

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  • Occultation exploration system and method suitable for aerostat
  • Occultation exploration system and method suitable for aerostat
  • Occultation exploration system and method suitable for aerostat

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Embodiment 1

[0027] In order to solve the technical problem that the existing occultation detection system is limited to aerostats, a GNSS radio occultation detection system suitable for aerostats and used for atmospheric profile detection is proposed. figure 1 It is a schematic structural diagram of an occultation detection system provided in Embodiment 1 of the present invention. combine figure 1 , The occultation detection system includes: a positioning antenna 10 , an occultation receiving antenna, a radio frequency processing device 20 and an occultation processing device 30 .

[0028] Wherein, the positioning antenna 10 is used to detect and receive the GNSS signal from the zenith transmitted by the GNSS satellite. The occultation receiving antenna comprises a forward occultation receiving antenna 11 and a backward occultation receiving antenna 12, the forward occultation receiving antenna 11 comprises a forward atmospheric occultation antenna, and the backward occultation receiving...

Embodiment 2

[0035] figure 2It is a schematic structural diagram of a board provided in Embodiment 2 of the present invention. The occultation processing device 30 and the radio frequency processing device 20 are arranged on the board, and the total size of the occultation processing device 30 and the radio frequency processing device 20 does not exceed the size of the board; meanwhile, the board is arranged on the carried aerostat. Aerostats generally refer to aircraft that are lighter than air and rely on atmospheric buoyancy to lift into the air, including but not limited to tethered balloons and airships. Airships include general airships, stratospheric airships, near-space airships, and space airships.

[0036] The difference between the size of the board and the cross-sectional size of the aerostat is within a preset range. Optionally, the cross-sectional dimension of the carried aerostat is 10 cm×10 cm. Since the thickness of the board is negligible, the size of the board refers ...

Embodiment 3

[0039] Figure 3a It is a schematic structural diagram of an SOC provided in Embodiment 3 of the present invention. The digital intermediate frequency signal includes multiple signals with different frequencies. Optionally, different frequencies include: GPS satellite signal 1575.42±10.23MHz (L1) frequency point signal, GPS satellite signal 1227.6±10.23MHz (L2) frequency point, Beidou BD 1561.098±2.046MHz (B1) frequency point and BD1207. 14±10.23MHz (B2) frequency point.

[0040] The FPGA3011 includes a digital correlator 3013 connected to the ARM3012. The digital correlator 3013 is used to perform frequency mixing and digital correlation operations on the digital intermediate frequency signal to obtain the original measurement data, and input the original measurement data to the ARM3012. ARM3012 is used to obtain occultation detection results based on original measurement data.

[0041] In addition, the digital correlator 3013 is also used to capture and track the digital ...

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Abstract

The embodiment of the invention discloses an occultation exploration system and method suitable for an aerostat. The occultation exploration system comprises a positioning antenna, an occultation receiving antenna, a radio frequency processing device and an occultation processing device; the radio frequency processing device is used for acquiring GNSS (global navigation satellite system) signals received by the positioning antenna and the occultation receiving antenna, and performing intermediate frequency processing on the GNSS signals, thereby obtaining a digital intermediate frequency signal; the occultation processing device comprises a SOC (system on chip); a FPGA (field programmable gate array) is used for obtaining original measurement data according to the digital intermediate frequency signal, and inputting the original measurement data into an ARM; the ARM is used for obtaining an occultation exploration result according to the original measurement data. By adopting the high-performance SOC chip and FPGA+ARM architecture loaded thereon, the exploration system miniaturization, high integration, standardization and low-cost design are realized, and the system is suitable for the aerostats in multiple volumes, and the space resource utilization rate is improved.

Description

technical field [0001] Embodiments of the present invention relate to space detection technology, and in particular to an occultation detection system and method suitable for aerostats. Background technique [0002] With the improvement of the Global Navigation Satellite System (GNSS), GNSS remote sensing technology has emerged as the times require and has been greatly developed. GNSS remote sensing technology uses radio waves to propagate in the earth's atmosphere, and changes in physical quantities such as signal amplitude and phase after reflection are used to invert meteorological elements such as the earth's atmosphere. During the GNSS occultation event, the propagation characteristics of the GNSS navigation signal passing through the Earth’s atmospheric profile change due to the influence of atmospheric water vapor density, etc., by processing the amplitude and phase delay information of the GNSS occultation observation data, the inversion The temperature and humidity...

Claims

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Application Information

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IPC IPC(8): G01S19/14G01V3/17G01W1/08
CPCG01S19/14G01V3/17G01W1/08
Inventor 李昌兴郭启云杨荣康黄满义王鹏程张春泽
Owner CMA METEOROLOGICAL OBSERVATION CENT
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