KR20180130901A - The method to construct a Ground Test System (EGSE) for the precision navigation performance of a satellite navigation receiver for low-earth orbit satellite - Google Patents

The method to construct a Ground Test System (EGSE) for the precision navigation performance of a satellite navigation receiver for low-earth orbit satellite Download PDF

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KR20180130901A
KR20180130901A KR1020170067097A KR20170067097A KR20180130901A KR 20180130901 A KR20180130901 A KR 20180130901A KR 1020170067097 A KR1020170067097 A KR 1020170067097A KR 20170067097 A KR20170067097 A KR 20170067097A KR 20180130901 A KR20180130901 A KR 20180130901A
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navigation receiver
navigation
performance
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egse
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KR102026653B1 (en
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박진모
정진호
박성현
하준
권기호
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주식회사 두시텍
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements

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Abstract

The present invention relates to a method for configuring electrical ground support equipment (EGSE) for verifying precision navigation performance of a satellite navigation receiver for a low orbit satellite, which comprises the steps of: simultaneously connecting received RF signals to a reference navigation receiver, a target navigation receiver, and an RF data collection device by using an RF splitter in configuring an EGSE system for verifying performance of a navigation receiver for a low orbit satellite; configuring an RF collection device to receive a satellite RF signal and to store source data when being connected to the RF data collection device; storing a time synchronization signal of the RF collection device in an RF data collection server using time synchronization information of the reference navigation receiver in the previous step; and verifying and evaluating, by an ESGE software, the performance of the navigation receiver by comparing collected RF source data with a navigation data processing result of the reference navigation receiver and the target navigation receiver after the previous step. When a navigation receiver for a satellite used as a navigation device of a low orbit satellite is developed, the performance of the navigation receiver is required to be verified on the ground. Herein, when a navigation receiver which can be a reference is used, a comparing method with a signal actually received by navigation receivers is necessary in order to verify the performance of a reference navigation receiver and to test more advanced performance. According to the present invention, the performance of the navigation receivers can be compared with RF source data, thereby having higher reliability and more accurate verification result than a conventional EGSE test and verification method.

Description

저궤도 위성용 위성항법수신기의 정밀 항법성능 검증용 지상시험 장치(EGSE) 구성 방법{The method to construct a Ground Test System (EGSE) for the precision navigation performance of a satellite navigation receiver for low-earth orbit satellite}BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a method for constructing a ground test apparatus (EGSE) for verifying a precision navigation performance of a low-altitude satellite navigation receiver,

본 발명은 저궤도 위성에 탑재되는 위성항법 수신기(이하, 항법 수신기)의 정밀한 항법성능검증 시험을 위한 지상시험 장치에 구현/구성 방법에 관한 것이다. 위성체 시험에서 실제 우주환경에서 직접 시험을 할 수 없기 때문에 GNSS시뮬레이터로 우주용 위성항법 신호를 생성해서, 항법수신기와 RF 원천 데이터 수집기에 동시에 입력해서, SDR(Software Defined Receiver) 후처리로 항법 성능을 검증하는 방법에 관한 것이다.The present invention relates to a method for implementing and configuring a ground test apparatus for precise navigation performance verification test of a satellite navigation receiver (hereinafter referred to as a navigation receiver) mounted on a low orbit orbit satellite. Since it is not possible to directly test in the space environment in the satellite test, it is possible to generate the space satellite navigation signal with the GNSS simulator and simultaneously input it into the navigation receiver and the RF source data collector, and the navigation performance with Software Defined Receiver (SDR) And a method of verifying the same.

위성용 항법수신기를 개발하는 과정에서 수신기의 성능을 시험하고 검증하기 위해서는 지상에서 위성이 우주에서 수신하는 신호를 모사하고 그 결과를 분석하는 EGSE(Electrical Ground Support Equipment)가 필요하다. 위성을 우주로 보내지기 전에는 우주에서 수신되는 실 신호를 수신할 수 없기 때문이다. 지상에서 우주에서 수신하게 될 위성 신호를 임의로 생성하고 이를 항법수신기에 입력하여, 위성을 우주로 보내기 전에 그 성능을 검증해야 한다.In order to test and verify the performance of a receiver in the process of developing a satellite navigation receiver, EGSE (Electrical Ground Support Equipment) is needed to simulate the signals received from space on the ground and analyze the results. Because it can not receive real signals from space before it is sent to space. We must arbitrarily generate a satellite signal that will be received from space on earth and input it into the navigation receiver to verify its performance before sending it to space.

위성에게 우주 환경에서 수신하게 될 위성 신호는 GNSS 시뮬레이터로 생성하고, 항법수신기는 이 신호를 수신하여 항법 데이터를 생성한다. 이때 항법수신기의 성능을 시험하기 위해서는 기준이 되는 항법수신기와 목표 항법 수신기에게 동시에 신호를 입력하고 그 결과를 비교하여 그 성능을 평가한다.The satellite signal to be received by the satellite in the space environment is generated by the GNSS simulator, and the navigation receiver receives the signal to generate the navigation data. In order to test the performance of the navigation receiver at this time, the signals are inputted to the reference navigation receiver and the target navigation receiver at the same time, and the results are compared to evaluate the performance.

[문헌1] US 5635683 A (MCDERMOTT, R. M.) 1997.06.03.[Patent Document 1] US 5635683 A (MCDERMOTT, R. M.) 1997.06.03. [문헌2] JP 10-105775 A 1998.04.24, 5쪽, 3-15줄, 도면1[Document 2] JP 10-105775 A 1998.04.24, page 5, line 3-15, drawing 1

[문헌1] WALTON, Herrmann. 초고주파 양자 이론. 런던: Sweet와 Maxwell, 1973, Vol.2, ISBN 5-1234-5678-9, 138-192쪽[Document 1] WALTON, Herrmann. Very High Frequency Quantum Theory. London: Sweet and Maxwell, 1973, Vol.2, ISBN 5-1234-5678-9, pp. 138-192 [문헌2] 고성능 컴퓨터 아키텍처에 대한 제3차 국제심포지움 [on-line], 1997.2.(검색일 : 1998.05.20.) [Literature 2] Third International Symposium on High Performance Computer Architecture [On-line], 1997.2. (Search date: May 20, 1998)

본 발명은 저궤도 위성용 항법수신기가 우주에 보내지기 전에 지상에서 목표 항법수신기 성능을 검증하기 위한 EGSE 시스템을 구성할 때 기준 항법수신기의 자체의 성능을 검증하기 위한 방법과 기준 항법수신기보다 진보된 목표 수신기의 성능을 검증하기 위해서 RF 원천 데이터를 획득하는 저궤도 위성용 위성항법수신기의 정밀 항법성능 검증용 지상시험 장치(EGSE) 구성 방법을 발명하고자 한다.The present invention relates to a method for verifying the performance of a reference navigation receiver itself when constructing an EGSE system for verifying performance of a target navigation receiver on the ground before a low-orbit orbit navigation receiver is sent to space, (EGSE) for low - orbit satellite satellite navigation receivers to acquire RF source data to verify the performance of the EGSE.

본 발명은 저궤도 위성용 항법수신기의 성능을 검증하기 위해서 EGSE 시스템을 구현하고자 할 때 기준 항법수신기와 목표 항법 수신기를 동시에 GNSS 시뮬레이터에 연결하여 그 결과를 비교하면서, 동시에 RF 데이터 수집 장치를 연결하여 RF 원천 데이터를 RF 데이터 수집 서버에 저장한다. 이때 기준 항법수신기의 시각 동기화 신호를 이용하여 RF 원천 데이터와 항법수신기들이 전송한 결과를 비교하기 위해 시각 정보를 저장하고, EGSE 소프트웨어에서 기준 항법수신기, 목표 항법수신기, RF 원천 데이터를 모두 비교하여 목표 항법 수신기의 성능을 검증하는 방법을 발명한다.When the EGSE system is implemented to verify the performance of a low-orbit satellite navigation receiver, the reference navigation receiver and the target navigation receiver are simultaneously connected to the GNSS simulator, and the results are compared. Simultaneously, And stores the data in an RF data acquisition server. In this case, the time information is stored to compare the RF source data and the results transmitted by the navigation receivers using the time synchronization signal of the reference navigation receiver, and the reference navigation receiver, the target navigation receiver, and the RF source data are compared in the EGSE software We invent a method for verifying the performance of a navigation receiver.

본 발명으로 저 궤도 위성의 항법 장치로 사용되는 위성용 항법수신기를 개발할 때 지상에서 그 항법 수신기의 성능을 검증하는 것이 필요하며, 이때 기준이 되는 항법수신기를 사용함에 있어서 기준 항법수신기 자체의 성능을 검증하고 더 진보된 성능을 시험하기 위해서는 실제로 항법 수신기들이 수신하는 신호와 비교하는 방법이 필요하다. 본 발명으로 항법 수신기들의 성능을 RF 원천 데이터와 비교할 수 있게 되므로 기존의 EGSE 시험 및 검증 방법보다 더 신뢰도가 높으며 정밀한 검증 결과를 얻을 수 있다.In the present invention, it is necessary to verify the performance of the navigation receiver on the ground when developing a satellite navigation receiver used as a low-orbit satellite navigation device. In this case, when the reference navigation receiver is used, In order to test more advanced performance, it is necessary to actually compare the signals received by the navigation receivers. The present invention makes it possible to compare the performance of the navigation receivers with the RF source data, thereby providing more reliable and accurate verification results than the existing EGSE test and verification methods.

도 1은 본 발명에 따른 EGSE 시험 시스템 구성도
도 2는 본 발명에 따른 EGSE 시험 시스템의 검증 결과 출력1 is a block diagram of an EGSE test system according to the present invention;
FIG. 2 is a graph showing the results of the verification of the EGSE test system according to the present invention.

본 발명을 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.The present invention will now be described in detail with reference to the accompanying drawings.

도 1에서 저궤도 위성이 우주에서 수신하게 되는 RF 신호를 시뮬레이션 하기 위한 신호를 생성하는 GNSS 시뮬레이터를 RF 스플리터에 연결하고, RF 스플리터의 출력을 기준 항법수신기, 목표 항법수신기, RF 데이터 수집 장치(1)에 동시에 연결한다.1, a GNSS simulator for generating a signal for simulating an RF signal to be received by a low orbit satellite in space is connected to an RF splitter, and the output of the RF splitter is connected to a reference navigation receiver, a target navigation receiver, .

도 1에서 기준 항법 수신기(2)는 미리 제작되어 사용되고 있는 위성용 항법 수신기로 RF 스플리터(1)에서 수신된 위성 신호를 항법 데이터로 처리하고 그 결과를 EGSE 소프트웨어에게 전송한다. 이 때 기준 항법수신기(2)의 시각 정보를 RF 데이터 수집 서버(5)에게 전송하여 시각 동기화 정보를 생성한다.In FIG. 1, the reference navigation receiver 2 is a satellite navigation receiver manufactured and used in advance, and processes the satellite signal received by the RF splitter 1 as navigation data and transmits the result to the EGSE software. At this time, time information of the reference navigation receiver 2 is transmitted to the RF data collection server 5 to generate time synchronization information.

도 1에서 목표 항법 수신기(3)은 시험 및 검증하고자 하는 저궤도 위성용 항법수신기로 RF 스플리터(1)에서 수신된 위성 신호를 항법데이터로 처리하고 그 결과를 EGSE 소프트웨어에게 전송한다.In FIG. 1, the target navigation receiver 3 is a low-orbit satellite navigation receiver to be tested and verified, processes the satellite signal received by the RF splitter 1 as navigation data, and transmits the result to the EGSE software.

도 1에서 RF 데이터 수집장치(4)는 RF 스플리터(1)에서 수신된 위성 신호를 처리나 가공하지 않고 그대로 RF 데이터 수집 서버(5)에게 전송한다. RF 데이터 수집 서버(5)는 수신된 원천 RF 데이터를 수신된 시각 동기화 정보와 같이 RF 데이터 베이스에 저장한다.1, the RF data collecting apparatus 4 transmits the satellite signals received by the RF splitter 1 to the RF data collecting server 5 without processing or processing. The RF data collection server 5 stores the received source RF data in the RF database together with the received time synchronization information.

도 1에서 EGSE 소프트웨어(6)는 기준 항법수신기, 목표 항법수신기가 전송하는 정보를 처리하여 항법 데이터를 생성하고, RF 데이터 수집 서버에 같은 시각에 수신된 RF 원천 데이터를 요청하여 기준 항법수신기 및 목표 항법수신기의 결과와 비교한다.In FIG. 1, the EGSE software 6 processes the information transmitted from the reference navigation receiver and the target navigation receiver to generate navigation data, and requests RF source data received at the same time to the RF data acquisition server, Compare with the results of the navigation receiver.

기준 항법 수신기보다 더욱 성능이 좋은 기능을 시험하거나, 기준 항법 수신기의 성능을 검증하고자 할 때에는 수신기들의 처리 결과 전에 각 수신기에 입력된 RF 신호와 비교하는 방법이 필요하다. 수신기들의 처리 결과와 이 처리 결과와 시각 동기화된 RF 신호의 원천 데이터와 비교함으로 보다 정밀하고 신뢰성 있는 시험 결과를 얻을 수 있다.In order to test the performance of the reference navigation receiver or to verify the performance of the reference navigation receiver, a method of comparing with the RF signal inputted to each receiver before the processing result of the receivers is required. More precise and reliable test results can be obtained by comparing the processing results of the receivers with the source data of the RF signal synchronized with the processing result.

RF 신호의 원천 데이터를 수집하기 위해서는 GNSS 시뮬레이터와 기준 항법 수신기, 목표 항법 수신기, RF 데이터 수집 장치를 동시에 RF 스플리터에 연결하고, 각각의 처리 결과를 EGSE 서버와 RF 데이터 수집 서버에 저장한다. RF 데이터는 기준 항법수신기의 시각 동기화 신호와 동기화된 시각을 저장하여 기준 항법수신기 및 목표 항법수신기의 처리 결과 중 동일한 시각을 가진 데이터와 비교하여 그 결과를 평가하여 목표 위성용 항법 수신기의 성능을 검증한다.In order to collect the source data of the RF signal, the GNSS simulator, the reference navigation receiver, the target navigation receiver, and the RF data acquisition device are concurrently connected to the RF splitter and the respective processing results are stored in the EGSE server and the RF data acquisition server. The RF data stores the time synchronized with the time synchronization signal of the reference navigation receiver and compares it with data having the same time among the processing results of the reference navigation receiver and the target navigation receiver and evaluates the result to verify the performance of the target satellite navigation receiver .

도 2에서 EGSE 소프트웨어가 비교 및 분석한 결과는 실시간 결과(1)을 출력하고, RF 원천 데이터의 결과와 비교한 분셕 결과(2)를 출력하여 목표 항법수신기의 성능을 검증한다. In FIG. 2, the EGSE software compares and analyzes the real-time result (1) and outputs the result (2) of the comparison with the RF source data to verify the performance of the target navigation receiver.

1: RF 스플리터 2: 기준 항법수신기
3: 목표 항법 수신기 4: RF 데이터 수집장치
5: RF 데이터 수집 서버 6: EGSE 소프트웨어1: RF splitter 2: reference navigation receiver
3: Target navigation receiver 4: RF data acquisition device
5: RF data acquisition server 6: EGSE software

Claims (1)

저궤도 위성용 항법수신기의 성능을 검증하기 위한 EGSE 시스템을 구성하는데 있어서 수신된 RF 신호들을 RF 스플리터를 이용하여 기준 항법 수신기, 목표 항법 수신기, RF 데이터 수집장치에 동시에 연결하는 단계,
상기 RF 데이터 수집장치에 연결하는데 있어서 위성 RF 신호를 수신하고 원천 데이터를 저장하기 위해 RF 수집 장치를 구성하는 단계,
상기 단계에 있어서 기준 항법 수신기의 시각 동기화 정보를 이용하여 RF 수집 장치의 시각 동기화 신호를 RF 데이터 수집 서버에 저장하는 단계, 및
상기 단계 후 EGSE 소프트웨어가 기준 항법 수신기, 목표 항법 수신기의 항법 데이터 처리 결과와 수집한 RF 원천 데이터를 비교하여 항법수신기의 성능을 검증하고 평가하는 단계를 포함하는 저궤도 위성용 위성항법수신기의 정밀 항법성능 검증용 지상시험 장치(EGSE) 구성 방법. In order to construct the EGSE system for verifying the performance of the low-orbit satellite navigation receiver, it is necessary to simultaneously connect the received RF signals to the reference navigation receiver, the target navigation receiver and the RF data acquisition device using an RF splitter,
Configuring an RF acquisition device to receive satellite RF signals and store source data in connection to the RF data acquisition device,
Storing the time synchronization signal of the RF collection device in the RF data collection server using the time synchronization information of the reference navigation receiver,
The EGSE software verifies the performance of the navigation receiver by comparing the result of processing the navigation data of the reference navigation receiver and the target navigation receiver with the collected RF source data and then evaluating the performance of the navigation receiver to verify the precision navigation performance of the low- Method for constructing EGSE.
KR1020170067097A 2017-05-30 2017-05-30 Performance Verification of Navigation Receiver Using Ground Test System (EGSE) for Verification of Precision Navigation Performance of Satellite Navigation Receiver for Low Earth Orbit Satellite KR102026653B1 (en)

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