作者: 認(rèn)識(shí) 時(shí)間: 2025-3-21 22:03
Radioaktive Elemente: Actinoidey. The 3-D orbit overlap accuracy of IGSO and MEO satellites has been improved by using the estimated PCO parameters, achieving an improvement of 17.7% and 20.0%, respectively. In addition, with the estimated PCO parameters, the precision of station coordinates PPP reaches 7.44?mm and 14.01?mm in th作者: perpetual 時(shí)間: 2025-3-22 01:52 作者: enterprise 時(shí)間: 2025-3-22 05:35 作者: Exposition 時(shí)間: 2025-3-22 11:45
Statistik und Okonomie der Leuchtfarben, and the orbit accuracy of broadcast ephemeris of different satellites is improved by 20%–80%. ABC-BP NN has higher accuracy than BP NN, and the results of 3 and 5?days of different orbit types show that it has better ability to control error accumulation, and has better error compensation results f作者: 粘土 時(shí)間: 2025-3-22 15:25
https://doi.org/10.1007/978-3-663-07570-7and about 1.4?cm in U direction. The convergence time is about 15 min. The BDS-2/BDS-3 ISB is within?±?10 ns, and the long- and short-term changes are stable, depending on the receiver type. Considering the ISB between BDS-2/BDS-3 systems can help improve positioning accuracy and convergence speed.作者: 粘土 時(shí)間: 2025-3-22 20:48
https://doi.org/10.1007/978-3-663-07570-7tellation has become a direction that could not be ignored in various fields in recent years. Based on GNSS technology, this paper studied the theoretical method and achievable accuracy of precise orbit determination and time synchronization of LEO constellation. On this basis, the degraded backup e作者: 輪流 時(shí)間: 2025-3-22 23:35
https://doi.org/10.1007/978-3-663-07570-7 stations, and the polar coordinate accuracy is better than the case of introducing BDS-3 ISL. Based on 10 Chinese stations, the RMS of polar X, Y coordinate and LOD with BDS-3 ISL are 16.3 μas, 39.8 μas, 7.9 μs, respectively. The contribution of BDS-3 ISL is more pronounced than that of 72 LEO sate作者: 反叛者 時(shí)間: 2025-3-23 04:32 作者: Insul島 時(shí)間: 2025-3-23 07:42
https://doi.org/10.1007/978-3-663-07570-7orbit precision. Two weeks of onboard BDS-3 observation were used to assess the BDS-based POD performance. For HY-2D satellite based on BDS-3 instruments, the capability of continuous tracking is at the global level, and almost all the epochs can have 5–7 usable BDS satellites. The mean root-mean-sq作者: 赦免 時(shí)間: 2025-3-23 10:09 作者: delta-waves 時(shí)間: 2025-3-23 17:38
,Prüfung und Messung der Leuchtfarben,urement data for testing and analysis. The simulation results show that the adopted technical method has the ability to detect data anomalies and ensures that the relative positioning ambiguity of Beidou is fixed. Compared with the reference baseline value, the relative positioning accuracy of Beido作者: antiquated 時(shí)間: 2025-3-23 20:12 作者: 修正案 時(shí)間: 2025-3-23 23:48 作者: 并置 時(shí)間: 2025-3-24 04:03 作者: paltry 時(shí)間: 2025-3-24 06:44
The Application of Global Ionospheric Map in Deep Space Orbit Determinationsets show an obvious similarity and the correlation coefficients are within (0.943?–?0.977). Last, the BAC GIM products’ application in the “Tianwen-1” Mars Exploring Mission is also performed. The ionospheric delays in range and rate measurements collected at Jiamusi, Kashi and Argentina DSN statio作者: 友好關(guān)系 時(shí)間: 2025-3-24 12:48 作者: finale 時(shí)間: 2025-3-24 18:13 作者: 制定法律 時(shí)間: 2025-3-24 22:22 作者: 有組織 時(shí)間: 2025-3-25 02:52
BDS-2 Broadcast Ephemeris Orbit Error Compensation Based on ABC-BP Neural Network and the orbit accuracy of broadcast ephemeris of different satellites is improved by 20%–80%. ABC-BP NN has higher accuracy than BP NN, and the results of 3 and 5?days of different orbit types show that it has better ability to control error accumulation, and has better error compensation results f作者: thrombosis 時(shí)間: 2025-3-25 04:52 作者: Bricklayer 時(shí)間: 2025-3-25 10:32 作者: 主動(dòng)脈 時(shí)間: 2025-3-25 12:37 作者: 幸福愉悅感 時(shí)間: 2025-3-25 19:09 作者: 寬宏大量 時(shí)間: 2025-3-25 20:08
Precise Orbit Determination of LEO Satellite Using Onboard BDS-3 B1C/B2a Observationsorbit precision. Two weeks of onboard BDS-3 observation were used to assess the BDS-based POD performance. For HY-2D satellite based on BDS-3 instruments, the capability of continuous tracking is at the global level, and almost all the epochs can have 5–7 usable BDS satellites. The mean root-mean-sq作者: oncologist 時(shí)間: 2025-3-26 01:38
Preliminary Results of iGMAS BDS/GNSS Absolute Antenna Phase Center Field Calibratione model characteristics with similar frequencies are relatively close. The internal conformity accuracy between the calibration results of multiple time periods is better than 1 mm, and the short baseline positioning verification consistency accuracy can reach 1.5–3 mm.作者: Champion 時(shí)間: 2025-3-26 08:08 作者: Paraplegia 時(shí)間: 2025-3-26 11:06 作者: 愉快么 時(shí)間: 2025-3-26 14:38 作者: 油氈 時(shí)間: 2025-3-26 17:02 作者: 描繪 時(shí)間: 2025-3-26 22:18
Aufarbeitung, Trennung und Herstellung,ons by international GNSS Monitoring and Assessment System BAC Analysis Center (BAC), is analyzed in this paper. First, during the “Tianwen-1” Mars Exploring Mission Mars-docking-orbit phase, the comparison among the GIM products of BAC, Center for Orbit Determination in Europe (CODE) and Jet Propul作者: 專橫 時(shí)間: 2025-3-27 02:02
Radioaktive Elemente: Actinoideing stations. The variation tendency and contributing factors of PCO daily estimation sequences are analyzed. The estimated PCO values for BDS-3 IGSO and MEO satellites are carried out and compared with the official published values calibrated by satellite manufacturers on the ground.On this basis, 作者: engagement 時(shí)間: 2025-3-27 07:51 作者: flammable 時(shí)間: 2025-3-27 13:01
https://doi.org/10.1007/978-3-642-53050-0ed on the BDS-3 penta-frequency ionospheric-reduced (IR) combinations is proposed. First, the low-noise and weak-ionospheric delay characteristics of the multi-frequency combinations of BDS-3 is analyzed. Second, the multi-frequency extra-wide-lane (EWL)/ wide-lane (WL) combinations with long-wavele作者: 描述 時(shí)間: 2025-3-27 14:31
L. G. Erwall,H. G. Forsberg,K. Ljunggren improved method is proposed for GPS IFCB short-term prediction, which fits linear and sinusoidal terms of the harmonic model adopting epoch-differenced (ED) IFCB and corrects constant term using the precision IFCB with the nearest epoch to the initial prediction epoch. The jumps in adjacent predict作者: 清楚說話 時(shí)間: 2025-3-27 18:51 作者: Ancillary 時(shí)間: 2025-3-28 01:34
Statistik und Okonomie der Leuchtfarben, become the focus. Broadcast ephemeris is a prerequisite for normal navigation in real time navigation and positioning. The real-time performance of broadcast ephemeris results in bad orbit accuracy, and its error variation cannot be accurately described by mathematical model, which has a unignorabl作者: GLOSS 時(shí)間: 2025-3-28 05:17 作者: 使迷醉 時(shí)間: 2025-3-28 08:50
https://doi.org/10.1007/978-3-663-07570-7 United States, GLONASS of Russia, BDS of China and Galileo of Europe. The development of the four satellite navigation systems not only changes the trajectory of human activities on the earth’s surface, but also provides a cheap and efficient way for the accurate positioning and timing of other air作者: Cleave 時(shí)間: 2025-3-28 12:10 作者: inscribe 時(shí)間: 2025-3-28 18:10
,Prüfung und Messung der Leuchtfarben,n receiver side, the traditional BDS precise clock estimation (PCE) and precise point positioning (PPP) models for the BDS-2 and BDS-3 combined processing will reduce the accuracy and stability of solutions. To improve the BDS service performance, the ISB between BDS-2 and BDS-3 for both old (B1I/B3作者: 不愛防注射 時(shí)間: 2025-3-28 21:18
https://doi.org/10.1007/978-3-663-07570-7 field determination, satellite altimetry, and remote sensing measurement depend crucially on the precise orbits of the spacecraft. BeiDou global navigation satellite system (BDS-3) is officially completed in 2020 and offers positioning, navigation, and timing (PNT) service for global users. The onb作者: 蹣跚 時(shí)間: 2025-3-29 00:32 作者: Interregnum 時(shí)間: 2025-3-29 05:58 作者: 通便 時(shí)間: 2025-3-29 08:29
,Prüfung und Messung der Leuchtfarben, on Beidou can provide highly reliable and high-precision relative position results for the rendezvous and docking of the space station. However, the GNSS receiver is in a high-speed motion state, and the complexity of the space environment, especially the change of the ionosphere, is prone to vario作者: OVERT 時(shí)間: 2025-3-29 14:35
,Prüfung und Messung der Leuchtfarben,ome the problems of large-scale construction of ground stations as well as difficulties in building stations at sea, a global PPP-RTK method based on GRO (GNSS Radio Occultation) and LRO (LEO Radio Occultation) is proposed. Firstly, the mathematical model of occultation events is studied, and then t作者: paleolithic 時(shí)間: 2025-3-29 18:12
https://doi.org/10.1007/978-3-663-07570-7elay caused by the ionosphere is one of the most problematic error sources in its data processing. With the completion of the BeiDou Global Navigation Satellite System (BDS), the users can access BDS positioning, navigation, and timing (PNT) service around the world. It is crucial to generate high-p作者: synovial-joint 時(shí)間: 2025-3-29 20:18
Erratum to: Die radioaktiven Substanzen,ith a larger size and vertically upwards to absorb more energy. In order to solve the problem of obstructing the observation field of the GNSS positioning antenna, the GNOS positioning antenna on the FY3E is designed as a dual-antenna combination cooperative observation method. Therefore, the precis作者: 間諜活動(dòng) 時(shí)間: 2025-3-30 01:20
https://doi.org/10.1007/978-981-19-2576-4CSNC 2022; Satellite Navigation; GNSS; BDS; beidou作者: Figate 時(shí)間: 2025-3-30 04:31 作者: Schlemms-Canal 時(shí)間: 2025-3-30 11:02
Changfeng Yang,Jun XieCollects selected CSNC 2022 papers.Presents the latest studies of Global Navigation Satellite System in China.Covers hot topics in Global Navigation Satellite System作者: 柳樹；枯黃 時(shí)間: 2025-3-30 14:04 作者: 反對(duì) 時(shí)間: 2025-3-30 19:45
The Application of Global Ionospheric Map in Deep Space Orbit Determinationons by international GNSS Monitoring and Assessment System BAC Analysis Center (BAC), is analyzed in this paper. First, during the “Tianwen-1” Mars Exploring Mission Mars-docking-orbit phase, the comparison among the GIM products of BAC, Center for Orbit Determination in Europe (CODE) and Jet Propul作者: Sputum 時(shí)間: 2025-3-31 00:25
Estimation and Validation of BDS-3 IGSO/MEO Satellites Antenna Phase Center Offsetsing stations. The variation tendency and contributing factors of PCO daily estimation sequences are analyzed. The estimated PCO values for BDS-3 IGSO and MEO satellites are carried out and compared with the official published values calibrated by satellite manufacturers on the ground.On this basis, 作者: 輕快來事 時(shí)間: 2025-3-31 01:16 作者: 桉樹 時(shí)間: 2025-3-31 07:16
Long-Baseline Single-Epoch RTK Positioning Method Based on BDS-3 Penta-Frequency Ionosphere-Reduced ed on the BDS-3 penta-frequency ionospheric-reduced (IR) combinations is proposed. First, the low-noise and weak-ionospheric delay characteristics of the multi-frequency combinations of BDS-3 is analyzed. Second, the multi-frequency extra-wide-lane (EWL)/ wide-lane (WL) combinations with long-wavele作者: Facilities 時(shí)間: 2025-3-31 11:35 作者: 騷擾 時(shí)間: 2025-3-31 15:26 作者: 施魔法 時(shí)間: 2025-3-31 21:01 作者: Hla461 時(shí)間: 2025-3-31 23:46
Analysis of Inter-system Bias Characteristics Between GPS/BDS and Influence on PPPfor the prediction and modeling of the inter-system basic, improving the precision and convergence speed of precise point positioning. This paper constructes GPS/BDS ionospheric-free combined PPP observation equation by considering ISB parameters. On this basis, the difference between BDS-2/GPS ISB 作者: Hypopnea 時(shí)間: 2025-4-1 05:05
Research on Precise Orbit Determination Time Synchronization and Extended Application of LEO Constel United States, GLONASS of Russia, BDS of China and Galileo of Europe. The development of the four satellite navigation systems not only changes the trajectory of human activities on the earth’s surface, but also provides a cheap and efficient way for the accurate positioning and timing of other air作者: Exclaim 時(shí)間: 2025-4-1 08:15
