KR101181990B1 - Raw measurement correcting reference station apparatus for multiplex satellite navigation - Google Patents

Abstract

PURPOSE: A multiple satellite navigation raw data compensating and integrating base station apparatus is provided to improve error correction through integrity monitoring and to reinforce error accuracy. CONSTITUTION: A weather information collecting unit(110) receives weather information including ion zone state and convection zone state from a weather sensor. A satellite navigation receiving unit(120) receives a satellite signal through a satellite navigation integration antenna and distributes the satellite signal to a plurality of satellite receivers according to satellite navigation modes. A signal quality inspecting unit(130) monitors signal quality of the satellite signal transferred from the satellite navigation receiving unit and collects correlated data. The signal quality inspecting unit measures distortion of the satellite signal by using multiple correlation data. An integrity processing unit(140) inspects the integrity of the satellite signal according to propagation environment change and monitors processed integrity information and signal quality inspecting information. A satellite compensation message generating unit(150) monitors channel state of the received information corresponding to the satellite signal by reflecting the weather information and creates satellite correction information according to a monitoring result.

Description

Multi-Satellite CORRECTING REFERENCE STATION APPARATUS FOR MULTIPLEX SATELLITE NAVIGATION}

The present invention relates to a multiple satellite navigation primitive correction integrated reference station apparatus applied to an integrated monitoring reinforcement system for monitoring multiple satellite navigation conditions.

Global Navigation Satellite System (GNSS) is a radionavigation system that calculates the receiver's position from radio signals received from satellites. It is the ideal navigation system that can be used throughout the earth regardless of time and weather conditions.

Early satellite navigation systems centered on global positioning systems (GPS) have been accepted as secondary navigation means, but they have become major navigational means along with improved economics, availability and positioning performance, intelligent transport systems (ITS) and geographic information (GIS). It is closely linked to the establishment of national infrastructure such as information systems and location-based services, and its applications are rapidly expanding in the fields of land, sea and aviation, geodetic and surveying, attitude measurement, visual synchronization and military. It is becoming.

In order to promote GPS as an international standard satellite navigation system, the US suspended S / A in May 2000, greatly improving the performance of GPS, and L2CS, a new civilian signal, and L5, a signal for special purposes such as aviation. Promoting a GPS modernization plan that includes.

The European Union is working on the Galileo plan, the next-generation civil satellite navigation system, focusing on the European Space Agency (ESA), in preparation for the exclusive operation of GPS by the US Department of Defense and the possibility of monetization, and improved accuracy, reliability and availability. Russia has also been launching satellite launches since 2003 after it announced the GLONASS-M and GLONASS-K plans, which have a longer lifespan than existing GLONASS (GLObal'naya NAvigatsionnaya Sputnikovaya Sistema) satellites and include new civilian signals.

In addition, for the sake of national security and economic benefits, Japan has introduced new independent regional satellite navigation systems such as the quasi-zenith satellite system (QZSS), China for COMPASS (North and Beidou), and India for the GPS and Geo Augmented Navigation system (GAGAN). Based on GNSS, a navigation system that improves positioning accuracy, integrity, and availability, such as the Wide Area Augmentation System (WASS) in the United States and the European Geostationary Navigation Overlay Service (EGNOS) in Europe. ), Japan-based Multi-functional Satellite Augmentation System (MASA) and The Quasi-Zenith Satellite System (QZSS), Satellite Based Augmentation System (SBAS) using geostationary orbit satellites, and Ground Based Augmentation (GBAS) using ground reference stations Construction / operation and research on various types of calibrated navigation systems such as System) are being actively conducted.

In the integrated surveillance reinforcement system for monitoring the multi-satellite navigation state as described above, the satellite navigation position error is corrected by using the measured satellite information by receiving real-time satellite information at fixed coordinates. Error, environmental error of the receiver, environmental error of the atmosphere, etc., and an integrated device for removing all error factors has been researched and developed to generate correction information through detailed analysis for each error factor.

In addition, the main causes of satellite navigation errors, such as electromagnetic noise or multipath propagation in the receiver, appear as the final position error along with the geometrical factors according to the satellite arrangement. This research should be developed.

The present invention generates a correction message for a satellite signal through integrated operations for tectonic shift monitoring, dedicated integrity control and integrity-based raw correction, thereby improving error correction and enhancing error precision through integrity monitoring. To provide a navigation primitive correction integrated reference station apparatus.

In addition, the present invention generates a combination of satellite error correction information based on the composite satellite status information, generates the correction information and network correction information of the Ministry of Land, Transport and Maritime Affairs, integrated monitoring of the distributed navigation satellite and correction broadcasting function positioning change state Accordingly, the present invention is to provide a multi-satellite navigation raw correction integrated reference station apparatus that can effectively detect errors in navigation satellites and provide accurate correction information, thereby preventing disasters caused by errors in advance.

The objects of the embodiments of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description .

According to an embodiment of the present invention, when a satellite signal is received through a weather information collecting unit 110 and a satellite navigation integrated antenna for receiving and providing weather information including a convective state from a weather sensor, according to a satellite navigation method. The satellite signals are respectively distributed to a plurality of satellite receivers, and the satellite navigation receiver 120 for transmitting the distributed satellite signals and the signal quality of the satellite signals transmitted from the satellite navigation receiver 120 are correlated and monitored. The signal quality inspection unit 130 collects the signal, measures the distortion of the signal due to external interference using the multi-correlation data, and transmits corresponding signal quality inspection information, and the navigation satellite and the navigation satellite using the signal quality inspection information. Detects a failure of the satellite navigation receiver, checks the integrity of the satellite signal according to changes in the radio wave environment, When the satellite signal is transmitted from the integrity processing unit 140 and the satellite navigation receiver 120 to monitor the signal quality inspection information, the channel state of the received information corresponding to the satellite signal is monitored by reflecting the weather information. And generating correction information for each satellite according to the monitoring result, using the integrity flag provided from the integrity processing unit 140 to inform abnormal satellite channel signals of the satellite correction information, and generating and transmitting a correction message according to the message format. A multi-satellite navigation raw correction integrated reference station apparatus may be provided that includes a satellite correction message generation unit 150 and a network service unit 160 which transmits the correction message for each network type.

In the present invention, by generating the correction message for the satellite signal through the integrated operation for the perceptual fluctuation monitoring, dedicated integrity control and integrity-based raw correction, it is possible to improve error correction and enhance error precision through integrity monitoring.

In addition, the present invention generates a combination of satellite error correction information based on the composite satellite status information, generates the correction information and network correction information of the Ministry of Land, Transport and Maritime Affairs, integrated monitoring of the distributed navigation satellite and correction broadcasting function positioning change state By doing so, the error of the navigation satellite can be effectively detected and precise correction information can be serviced, so that a disaster caused by the error can be prevented in advance.

1 is a block diagram of a multiple satellite navigation raw correction integrated reference station apparatus according to an embodiment of the present invention.

Advantages and features of the embodiments of the present invention, and methods of achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a multiple satellite navigation raw correction integrated reference station apparatus according to an embodiment of the present invention.

1, the multi-satellite navigation raw correction integrated reference station apparatus according to an embodiment of the present invention is a weather information receiver 110, satellite navigation receiver 120, signal quality checker 130, integrity processor 140, The satellite correction message generator 150 and the network service unit 160 may be included.

The weather information receiver 110 receives weather information through a weather sensor. The weather information receiver 110 may receive weather information including an ion layer state, a convection layer state, and the like from the weather sensor and provide the weather information to the satellite correction message generator 150.

The satellite navigation receiver 120 receives a plurality of satellite signals through a satellite navigation integrated antenna, including a signal distributor, a plurality of satellite receivers for each satellite navigation method, and when the satellite signals are received through the satellite navigation integrated antenna, The satellite signals may be distributed to a plurality of satellite receivers, respectively, and the divided satellite signals may be transmitted.

That is, the satellite navigation receiver 120 receives a satellite signal through the integrated satellite navigation antenna, the satellite navigation system (for example, including GPS, GLONASS, Galileo, QZSS, COMPASS, GAGAN, etc.) through a signal distributor According to the distribution, the satellite signal is input to the satellite receiver of the satellite navigation method, and then the satellite signal input to the satellite receiver, weather information receiver 110, signal quality checker 130, integrity processor 140, satellite The correction message may be transmitted to the generation unit 150 or the like.

The signal quality checker 130 checks the signal quality of the satellite signal including the multi-correlator, collects correlation data by monitoring the signal quality of the satellite signal transmitted from the satellite navigation receiver 120, and uses the multi-correlation data. Measure the distortion of the signal due to external interference, and transmit the corresponding signal quality check information (for example, multi-correlation data, early prompt late (EPL) signal malformation, signal distortion determination result, etc.) to the integrity processor 140. I can deliver it. The signal quality inspection information detects signal malformations of early prompt late (EPL) by acquiring correlation values according to multiple chip spacing of satellite signals through measuring signal distortion, and approximately 40 correlation values and multiples for each channel are obtained. The ADC of 4 bits (bit) or more may be configured with a channel (for example, four channels or more) to minimize the quantization loss and then transfer the ADC to the integrity processor 140. Here, the multicorrelator can provide high stability and low phase noise through the rubidium (Rb) atomic clock.

In addition, the signal quality inspector 130 may monitor the satellite signal by detecting malformations of a coarse / acquisition (C / A) code, a low C / No ratio, and an irregular variation of a code carrier. . Here, the malformation of the C / A code is detected by using the output of the multi-correlator, and the signal malformation analysis is performed through the EPL power analysis by variably adjusting the EPL interval for the satellite signal transmitted from the satellite navigation receiver 120. Can be done.

In order to detect anomalies of the C / A code, the multi-correlator may be configured to adjust the chip space according to a predetermined unit.In the multi-correlator, a plurality of ELs may be configured in in-phase and quadrature. The power can be calculated and the C / A code can be monitored (monitored) in the form of a pole of the EPL.

The integrity processor 140 detects the failure of the navigation satellite and the satellite navigation receiver through an integrity monitoring function, and checks the integrity of the satellite signal according to the change in the radio wave environment, and the integrity processed by the integrity processor. It may include an integrity monitoring server for monitoring the information and signal quality inspection information.

The integrity processor continuously monitors the navigation data of all satellite signals transmitted from the satellite navigation receiver 120 (DQM: data quality monitoring) and checks the integrity of the raw data corresponding to the satellite signals (IDM: integrity data monitoring). )can do.

In addition, the integrity processor detects signal abnormalities of the satellite receiver, and monitors sudden changes in the ion layer (SQM), and monitors measurement quality (MQM) measured at the satellite receiver of the reference station. Based on the flags generated from the DQM, SQM, and MQM, a common satellite set can be configured to check for channel signal abnormality (EXM: executive monitoring), thereby improving the integrity of the satellite signal.

Meanwhile, the integrity server may monitor the navigation satellite state by using the integrity information and the signal quality check information, and transmit an integrity flag corresponding to the integrity information to the satellite correction message generator 150.

In addition, the integrity server can detect an error by generating a B-Value at any one of a plurality of satellite receivers provided in the reference station, and checks a pseudo distance correction value between the plurality of satellite receivers using the generated B-Value. Multiple reference consistency check (MRCC) can be performed consistently, and the satellite correction information and the rate of change of correction information provided to the satellite navigation users can be examined.

Meanwhile, the integrity processor 140 may further include display means (eg, an LCD monitor, etc.) for displaying the respective test results performed by the integrity processor and the integrity server.

The satellite correction message generating unit 150 includes a correction message generating server, an integrated control server, and the like, and removes an abnormal channel signal using an integrity flag and generates a correction message according to a message format. When the satellite signal (ie, raw data) is transmitted from the navigation receiver 120, the channel state of the received information corresponding to the satellite signal is monitored by reflecting the weather information, and according to the result, the satellite correction information is generated and the integrity flag is generated. By removing the abnormal channel signal from the satellite correction information generated by using, and generates a correction message according to the message format can be transmitted through the network service unit 160 or the wireless transceiver.

In addition, the integrated control server is integrated control of each component of the multi-satellite navigation raw correction integrated reference station apparatus, in conjunction with the correction message generation server to generate a correction message, and can independently configure a correction message as needed, Integrity information such as SQM, DQM, IDM, MQM and the like can be serviced through the network service unit 160 or a wireless transceiver, and raw data generation and storage of the integrated satellite navigation signal, correction message transmission and verification can be performed.

The network service unit 160 provides a communication service for each of a plurality of network types by using a correction message including a beacon modulator, a hub, a mobile communication network, a unique wireless network, etc. The hub is responsible for two-way communication with the National Geographic Institute, the mobile communication network is responsible for two-way communication with the mobile communication terminal, and the original wireless network is responsible for two-way communication with the communication terminal connected to another reference station.

Thus, integrated operations for tectonic shift monitoring, dedicated integrity control, and integrity-based raw correction can be used to generate correction messages for satellite signals, thereby improving error correction and enhancing error precision through integrity monitoring.

In addition, the present invention generates a combination of satellite error correction information based on the composite satellite status information, generates the correction information and network correction information of the Ministry of Land, Transport and Maritime Affairs, integrated monitoring of the distributed navigation satellite and correction broadcasting function positioning change state By doing so, the error of the navigation satellite can be effectively detected and precise correction information can be serviced, so that a disaster caused by the error can be prevented in advance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be readily apparent that such substitutions, modifications, and alterations are possible.

110: weather information collection unit 120: satellite navigation receiver
130: signal quality inspection unit 140: integrity processing unit
150: satellite correction message generation unit 160: network service unit

Claims (7)

delete A weather information collection unit 110 for receiving and providing weather information including an ion layer state and a convection layer state from a weather sensor;
When the satellite signal is received through the satellite navigation integrated antenna, the satellite navigation receiver 120 for distributing the satellite signal to a plurality of satellite receivers according to the satellite navigation method, and transmitting the distributed satellite signal, and
The signal quality of the satellite signal transmitted from the satellite navigation receiver 120 is monitored to collect correlation data, the distortion of the signal due to external interference is measured by using the multi-correlation data, and signal quality inspection information corresponding thereto is obtained. Signal quality inspection unit 130 to transmit,
An integrity processor which detects a failure of a navigation satellite and a satellite navigation receiver using the signal quality inspection information, inspects the integrity of the satellite signal according to a change in radio wave environment, and monitors the processed integrity information and the signal quality inspection information ( 140),
When the satellite signal is transmitted from the satellite navigation receiver 120, the channel state of the received information corresponding to the satellite signal is monitored by reflecting the weather information, and the satellite correction information is generated according to the monitoring result. A satellite correction message generator 150 for removing an abnormal channel signal from the satellite correction information using an integrity flag provided from 140 and generating and transmitting a correction message according to a message format;
Network service unit 160 for transmitting the correction message for each network method
Including,

The signal quality inspector 130 detects signal malformations of early prompt late (EPL) by acquiring a correlation value according to multiple chip spacing of the satellite signal by measuring signal distortion, And configuring the ADC with a plurality of channels to minimize quantization loss and transmitting the signal quality check information. The method of claim 2,
The signal quality inspector 130 monitors the satellite signal in a manner of detecting anomaly of a coarse / acquisition (C / A) code, a low C / No ratio, and an irregular variation of a code carrier. A multi-satellite raw correction integrated reference station device. The method of claim 3, wherein
The integrity processor 140 includes an integrity processor to continuously monitor navigation data of the satellite signal (DQM: data quality monitoring), and check the integrity of raw data corresponding to the satellite signal (IDM: integrity data). monitoring, detecting signal abnormality of the satellite receiver, and monitoring a sudden change in the ion layer (SQM: signal quality monitoring), and inspecting observation values measured at the satellite receiver provided at a reference station (MQM: measurement quality) multi-navigation raw correction integrated reference station device, characterized in that for monitoring and (EXM: executive monitoring) based on flags generated from DQM, SQM, MQM. delete The method of claim 2,
The satellite correction message generating unit (150) includes an integrated control server for integrated control of each component, and constructs and transmits a correction message independently. The method of claim 2,
The network service unit (160) includes a beacon network, a hub, a mobile communication network, and a unique wireless network.

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