作者: obstinate 時間: 2025-3-21 23:39
Real-Time Kinematic Orbit Determination of GEO Satellite with the Onboard GNSS Receiverault detection algorithm based on residual are used to preprocess the onboard GPS data, they reduce the 3D error of the SPP kinematic orbit to 49.4 m and radial error to 46.4 m, which decreased by 45%. And they reduce the 3D error of the KPP kinematic orbit to 16?m, a reduction of 23%, and the radia作者: Lice692 時間: 2025-3-22 01:15 作者: 欲望小妹 時間: 2025-3-22 05:18 作者: Accolade 時間: 2025-3-22 11:04 作者: 脊椎動物 時間: 2025-3-22 14:49 作者: 脊椎動物 時間: 2025-3-22 18:08 作者: flourish 時間: 2025-3-22 21:36 作者: 箴言 時間: 2025-3-23 04:26 作者: nocturnal 時間: 2025-3-23 06:16 作者: 合法 時間: 2025-3-23 09:44
Assessment of Solar Radiation Pressure Models for BDS-3 MEO Navigation SatellitesM1 with a prior Box-wing model, ECOM2 with a prior Box-wing model, ECOM1 with an empirical force model, ECOM2 with an empirical force model) that commonly used for BDS-3 MEO satellites. The results indicate that compared with ECOM1 model, ECOM2 model can reduce orbit overlap error by 5.02% when sate作者: Aesthete 時間: 2025-3-23 15:26
Combined Processing of Outlier and Multipath in GNSS Precise Point Positioning20.3%, 49.2% and 13.6% in E, N, and U directions, respectively. Hence, the proposed method considering both the outlier and multipath can effectively improve the PPP positioning performance, especially under complex environments.作者: FEAS 時間: 2025-3-23 18:03
Polar Motion Prediction Based on the Combination of Weighted Least Squares and Vector Autoregressiveccurate than those by LS+AR. Furthermore, the medium-term predictions beyond 90?days can be improved by WLS+VAR in comparison with the prediction values provided by the IERS Bulletin A. The improvement in the prediction accuracy can reach up to 20%.作者: ARCH 時間: 2025-3-23 23:08 作者: 可忽略 時間: 2025-3-24 03:44 作者: 圖畫文字 時間: 2025-3-24 10:11
https://doi.org/10.1007/978-3-319-28305-0y of the three recurrent neural network models is equivalent, the average accuracy is more than 90%, and the prediction accuracy from high to low is GRU, RNN, and LSTM. The prediction method based on the cyclic neural network adopted in this paper can be applied to the state prediction of time serie作者: 疏遠天際 時間: 2025-3-24 10:47 作者: 陳舊 時間: 2025-3-24 15:24
Minze Stuiver,Gordon W. Pearsony, benefits of integrating ISL with ground tracking are still visible even with a denser global network. In this case, an average reduction of ~28% in orbit DBD 1D RMS can be observed after integrating ISL measurements, decreasing from 5.12?cm to 3.59?cm. In addition to range measurements, the profi作者: 大溝 時間: 2025-3-24 21:05
https://doi.org/10.1007/978-1-4757-4249-7this paper analyses the stability differences between CNES BIAS phase fractional deviation product systems, between satellites and between frequencies; achieves fast convergence of the BDS-3/GNSS full-frequency PPP-AR by optimising the partial ambiguity fixation algorithm, and analyses the contribut作者: 顛簸地移動 時間: 2025-3-25 02:51
Cosmogenic , Radiocarbon on the Earththermore, it is observed that selecting a suitable parameter estimation method leads to an improvement in both ZTD accuracy and PPP positioning accuracy. According to those results, we recommend the following order of preference for the four parameter estimation methods: RW, PWC:120, PWC:180, and PW作者: Aggrandize 時間: 2025-3-25 03:59 作者: opportune 時間: 2025-3-25 09:55 作者: 烤架 時間: 2025-3-25 14:31
Radiocesium Translocations in Bamboos(2) differences between LEO orbits obtained by RTS products and the broadcast ephemeris are used to generate orbit corrections and broadcasted to users. Results show that LEO near-real-time orbit achieves centimeter-level accuracy, and the fitting errors of broadcast ephemeris are smaller than 10?cm作者: GIDDY 時間: 2025-3-25 17:14 作者: 背心 時間: 2025-3-25 21:22 作者: brother 時間: 2025-3-26 02:10 作者: Commonwealth 時間: 2025-3-26 05:37 作者: glans-penis 時間: 2025-3-26 11:59
https://doi.org/10.1007/978-1-4613-4401-8ccurate than those by LS+AR. Furthermore, the medium-term predictions beyond 90?days can be improved by WLS+VAR in comparison with the prediction values provided by the IERS Bulletin A. The improvement in the prediction accuracy can reach up to 20%.作者: Fortuitous 時間: 2025-3-26 13:18
F. Weigel,K. H. Neeb,H. Philipphe L-band ODTS are basically consistent, and the frequency accuracy and drift rate of the hydrogen clock are better than rubidium clock. For the evaluation of frequency stability, the stabilities of BDS-3 satellite clocks for the averaging time of 1000?s and one day reach 2.5?×?10. and 2.5?×?10., re作者: Meditate 時間: 2025-3-26 17:14 作者: 期滿 時間: 2025-3-27 00:20 作者: Blanch 時間: 2025-3-27 04:42 作者: Congregate 時間: 2025-3-27 08:28
https://doi.org/10.1007/978-3-319-28305-0a growing trend. At the same time, the service is diversified and refined. Due to the huge system, operation and maintenance are increasingly difficult. To adapt to the high-quality and refined operation of the BDS, it is proposed to introduce artificial intelligence-related technologies to assist t作者: constellation 時間: 2025-3-27 10:32 作者: PAN 時間: 2025-3-27 13:48
Minze Stuiver,Gordon W. Pearsonn the whole constellation. A series of Precise Orbit Determination (POD) experiments have been conducted to investigate the contributions of ISL to the orbits of BDS-3 satellites in cases of different ground tracking coverage. Results show that the improvement in orbit precisions is most significant作者: 包租車船 時間: 2025-3-27 19:54 作者: 有幫助 時間: 2025-3-28 01:42 作者: 規(guī)章 時間: 2025-3-28 05:17 作者: 泛濫 時間: 2025-3-28 09:15
Masaaki Koganezawa,Kei Okuda,Emiko Fukui slip. The conventional satellite-by-satellite cycle slip processing method initializes the carrier phase ambiguity with cycle slip, decreases precise point positioning performance, and may lead to re-initialization. To avoid the degradation of positioning performance and even PPP re-initialization 作者: commune 時間: 2025-3-28 11:05 作者: 被告 時間: 2025-3-28 15:31
Uptake of Radiocesium by Plants We propose a single-receiver ambiguity fixing method by taking the carrier phase residual as the index to choose reference in the single-difference ambiguities. The ambiguity fixing performance and Precise Orbit Determination (POD) is verified by using the spaceborne BDS3 observation from Tianhui 0作者: GUISE 時間: 2025-3-28 19:18 作者: 上坡 時間: 2025-3-28 23:35 作者: Folklore 時間: 2025-3-29 03:12
Masaaki Koganezawa,Kei Okuda,Emiko Fukuinder complex environments. Based on the idea of robust estimation and multipath detection, a combined processing method considering the outlier and multipath simultaneously is proposed for GNSS PPP in this study. The GNSS observations in real complex environments were used to conduct the kinematic P作者: Parallel 時間: 2025-3-29 09:36 作者: Increment 時間: 2025-3-29 12:01
Radiochemical Methods in Analysisigh precision orbit and clock offset calculation of LEO satellites is one key to establish the stable and reliable space-time reference. Based on GPS/BDS/GALILEO data measured by LEO navigation satellites, this paper determines the precise LEO orbit and clock offset, and evaluates the precision of L作者: considerable 時間: 2025-3-29 16:10 作者: murmur 時間: 2025-3-29 21:17 作者: 大笑 時間: 2025-3-30 02:58
https://doi.org/10.1007/978-981-99-6944-9CSNC 2024; Satellite Navigation; GNSS; BDS; Beidou作者: 輕率的你 時間: 2025-3-30 04:17
978-981-99-6946-3Aerospace Information Research Institute 2024作者: JECT 時間: 2025-3-30 08:48 作者: VAN 時間: 2025-3-30 13:58 作者: 旋轉一周 時間: 2025-3-30 18:42
Performance Analysis of BDS-3 Klobuchar Models the legacy B1I and B3I signals. With the opening of BDS-3 global service, the service area of the broadcast Klobuchar model (BDSKlob) parameters expanded from China and parts of the Asia-Pacific region to the whole world. In this study, the differences between the GPS Klobuchar model (GPSKlob) and作者: cancellous-bone 時間: 2025-3-30 21:47 作者: Accede 時間: 2025-3-31 03:46 作者: 處理 時間: 2025-3-31 05:41
Real-Time Kinematic Orbit Determination of GEO Satellite with the Onboard GNSS Receiverhronization. For high earth orbit spacecraft, the space environment is very challenging for GNSS receivers to work. Taking the No. 2 Telecommunication Technology Test satellite (TTS-2) as an example, under both preprocessing strategies of the carrier phase smoothing pseudorange algorithm and single 作者: 使閉塞 時間: 2025-3-31 11:22 作者: 誰在削木頭 時間: 2025-3-31 13:24 作者: 打包 時間: 2025-3-31 18:54
Effect of Troposphere Parameter Estimation on BDS PPPX stations are selected over 24?days for static PPP using four parameter estimation methods: Random walk (RW), Piecewise Constant estimation (PWC: 120/180/360, estimated every 120/180/360 min). The results of the tropospheric zenith delay (ZTD) and PPP positioning are evaluated using the ZTD product作者: 幸福愉悅感 時間: 2025-4-1 01:44
Comprehensive Analysis of the Cycle Slip Detection Threshold in Kinematic PPP During Geomagnetic Sto paper analyzes the BDS/GPS kinematic Precise Point Positioning (PPP) accuracy during the November 2021 geomagnetic storm to investigate the impact of the cycle slip (CS) detection on positioning accuracy under an active ionosphere. The results show that when using the conventional constant threshol作者: 連詞 時間: 2025-4-1 05:06
Analysis of Rapid Re-initialization Performance of Precise Point Positioning for Low-Cost Receiver slip. The conventional satellite-by-satellite cycle slip processing method initializes the carrier phase ambiguity with cycle slip, decreases precise point positioning performance, and may lead to re-initialization. To avoid the degradation of positioning performance and even PPP re-initialization 作者: 雇傭兵 時間: 2025-4-1 07:43 作者: Cpr951 時間: 2025-4-1 10:25
