Assessment of GPS/BDS Precise Point Positioning Performance with BDS-3 New Signals

Liu, Zan; Li, Zengke; Wang, Yuming; Yang, Zhehua; Yang, Xiangsheng

doi:10.1007/978-981-16-3138-2_43

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…To obtain the high-precision coordinates, there are two main modes. One is Precise Point Positioning (PPP), which uses station observations to obtain the centimeter-level coordinates of the station with global precise orbit and clock corrections [ 8 , 9 , 10 ]. The other mode is Real Time Kinematic (RTK), or network RTK, which uses a reference station or reference network stations to eliminate common errors between a solution station and the reference stations so that real-time centimeter-level coordinates can be determined [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Data and Service Security of GNSS Sensors Integrated with Cryptographic Module

Zhang

et al. 2023

Micromachines

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Navigation and positioning are of increasing importance because they are becoming a new form of infrastructure. To ensure both development and security, this study designed a technical innovation structure to upgrade the GNSS (Global Navigation Satellite System) data transmission and real-time differential correction service system and proposed a new multiple cryptographic fusion algorithm to achieve the encryption and decryption of GNSS data and services. First, a GNSS station encrypts GNSS data with an encryption key and obtains a public key from a GNSS data center to encrypt the GNSS data encryption key. After that, identity authentication of a GNSS station is carried out, and an SSL VPN is established between the GNSS station and a GNSS data center before GNSS data are transmitted to the GNSS data center. Then, the GNSS data center decrypts the received GNSS data. The process of an intelligent terminal for real-time differential corrections is similar to that of the GNSS station and the GNSS data center. A GNSS sensor integrated with a cryptographic module was developed to validate the structure in an open environment. The results showed that the developed GNSS sensor was successful in encrypting the data, and the GNSS data center was able to decrypt the data correctly. For the performance test, a cryptography server was able support the requirements of GNSS applications. However, a cryptography server was optimal in supporting 40~50 GNSS stations simultaneously, whereas a cluster was suggested to be configured if the number of GNSS stations was more than 60. In conclusion, the method was able to ensure the validity, confidentiality, integrity, and non-repudiation of GNSS data and services. The proposed upgrading technology was suitable for coordinating GNSS development and security.

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Section: Introductionmentioning

confidence: 99%

Data and Service Security of GNSS Sensors Integrated with Cryptographic Module

Zhang

et al. 2023

Micromachines

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“…evaluated the B1C/B2a global regional dual-frequency PPP precision and compared it with GPS system, B1C/B2a was found to be worse than GPS L1L2 in terms of positioning precision in elevation direction, and comparable to GPS in terms of convergence [26]. Liu et al (2021) compared BDS-3 B1C/B2a with BDS B1IB3I and found the convergence time of B1C/B2a similar to that of B1IB3I; nonetheless, its positioning precision was better than that of B1IB3I [27]. Shi et al (2021) conducted single-frequency PPP experiments on B1I and B1C frequencies of BDS-2, BDS-3, and BDS-2/3, respectively, and the results showed that BDS-3 and BDS-2/3 PPP precision improved by about 60% compared to BDS-2 [28].…”

Section: Introductionmentioning

confidence: 99%

Algorithms Research and Precision Comparison of Different Frequency Combinations of BDS-3\GPS\Galileo for Precise Point Positioning in Asia-Pacific Region

Gao

Cao

Meng

et al. 2023

Sensors

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With the continuous construction and development of the BeiDou navigation satellite system (BDS), its positioning performance is constantly being improved. In this study, the positioning performance of different frequency combinations of BDS-3/GPS/Galileo in the Asia-Pacific region was investigated. The precision products of Wuhan University and the observation data of nine MGEX stations were selected to compare and analyze the B1I\B1C\B2a\B3I and L1\E1 pseudo-range Standard Point Positioning (SPP) and B1IB2a\B1IB3I\B1CB2a\B1CB3I\B2aB3I\L1L2\E1E5a precise point positioning (PPP) performance, while B1I\B3I\L1 SPP and B1IB3I PPP were investigated using BDS-2 with QZSS supplemented with BDS-3 and GPS. The experimental results showed that the positioning precision of BDS-3/GPS/Galileo SPP was in the order of B1C > E1 > L1 > B1I > B3I > B2a, and it was not significantly improved after BDS-2 and QZSS were added. Moreover, for the PPP of different frequency combinations, the convergence speed was in the order of L1L2 > B1IB3I > E1E5a > B1CB3I > B1CB2a > B1IB2a > B2aB3I. After adding BDS-2, B1IB3I improved by about 11% in static mode and 27% in kinematic mode, which was similar to the L1L2 frequency combination. The positioning precision of different frequency combinations of BDS-3/GPS/Galileo was B1IB3I > B1CB3I > L1L2 > E1E5a > B1B2a > B1CB2a > B2aB3I. In static mode, after adding BDS-2, B1IB3I did not show significant improvement in the plane direction, and showed ~61% improvement in the elevation direction, and ~67% in the three-dimensional (3D) direction. In kinematic mode, after adding BDS-2, B1IB3I was improved by about 16% in the E direction, the N direction did not show significant change, it improved by ~38% in the U direction and by ~70% in the 3D direction. In general, the positioning performance of BDS-3 was slightly better than those of GPS and Galileo in the Asia-Pacific region, and it is believed that with the continuous development of BDS, its positioning performance will surely be improved further.

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Assessment of GPS/BDS Precise Point Positioning Performance with BDS-3 New Signals

Cited by 2 publications

References 11 publications

Data and Service Security of GNSS Sensors Integrated with Cryptographic Module

Data and Service Security of GNSS Sensors Integrated with Cryptographic Module

Algorithms Research and Precision Comparison of Different Frequency Combinations of BDS-3\GPS\Galileo for Precise Point Positioning in Asia-Pacific Region

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