作者: Offensive 時間: 2025-3-21 23:24 作者: 別炫耀 時間: 2025-3-22 03:22
Research on the Method of Precisely Removing Open Water in the Retrieval of Soil Moisture by Spacebo data were screened, the open water area was removed, and the GNSS-R land surface reflectivity results after excluding open water are also obtained. Finally, by using SMAP (Soil Moisture Active Passiive) level 3 global soil moisture product as standard data from July 1 to 6, 2020, the reflectivity b作者: 凈禮 時間: 2025-3-22 07:45
Model Establishment of Atmospheric Weighted Mean Temperature in Chongming Eco-Island and Its Applicasult indicates that the mean bias (.) and the root-mean-square error (.) of CMTM are 1.97?k and 2.59?k, respectively, both of them are superior to the Bevis model. Based on the consecutive observation data of 4 GNSS stations in Chongming Eco-Island from 2019/8/7 to 2019/8/13 (UTC time) and CMTM, we 作者: 食草 時間: 2025-3-22 10:57 作者: Platelet 時間: 2025-3-22 15:21
Soil Moisture Retrieval Based on Satellite-Borne GNSS-R Technologysoil moisture retrieval. African soil moisture status was obtained using CYGNSS data from July to December 2018. Finally, the soil moisture retrieval method proposed in this paper was evaluated by comparing with the soil moisture data provided by SMAP. The results show that the soil moisture retriev作者: Platelet 時間: 2025-3-22 17:14 作者: 人造 時間: 2025-3-23 00:10 作者: 導師 時間: 2025-3-23 03:49
Application of a Fusion Communication System Based on Beidou Short Message Technology short messages. Compared with satellite phone, this method has the advantages of low price, low cost, easily to sending and receiving the short messages, no need to borrow mobile phone application software, and can be realized to send short messages each other between the Beidou short message termi作者: 上釉彩 時間: 2025-3-23 05:44
GNSS-IR Soil Moisture Inversion Method Based on Random Forestinversion result is improved by 5.76% and 6.21% compared with the inversion results of amplitude and band single parameter, and the RMSE is reduced by 29.55% and 37.10% respectively. The results show that the random forest algorithm used in frequency inversion is more effective than the amplitude an作者: 數(shù)量 時間: 2025-3-23 13:12
Tropospheric Delay Modeling Based on Multi-source Data Fusion and Machine Learning Algorithmserified by month, as well as the stability and efficiency. The results show that the effect of RBF is best when modeling ZTD with small-size training samples. Among them, the average RMSE of the ZTD models with RBF is 20.8?mm and 20.1?mm for two data-fusion strategies, respectively. The accuracy of 作者: 音樂等 時間: 2025-3-23 14:41
Research on Nonlinear Inversion of Vegetation Water Content Based on Multiple Ground-Based GPS-IRst, various elements are acquired through Google Earth Engine, and the resolution is unified through ArcGIS; Then, the relationship model between the multiple ground-based GPS-IR and related elements is established through the least square support vector machine (LS-SVM), and the modeling effects of作者: fatty-acids 時間: 2025-3-23 19:55
Investigation of the Characteristics of Tropopause Height Over China Using Recent RO Measurementsring the period 2015–2016, and the algorithm was the temperature lapse rate tropopause (LRT). Results showed that the distribution of the TPH is latitude-dependent. The TPH mainly concentrated in the 15.5–18?km altitude range in the southern part of China (latitude range: 0°N–33°N), whilst the TPH m作者: 木質(zhì) 時間: 2025-3-23 22:16 作者: 階層 時間: 2025-3-24 05:04 作者: 跟隨 時間: 2025-3-24 08:34 作者: 鍵琴 時間: 2025-3-24 10:47
https://doi.org/10.1007/978-3-642-50768-7segment with the FSO model library. This paper collected data from field experiments at Beijing Sanjiadian station to verify the algorithm. The scenario identification results showed that the scenario identification method based on DTW can effectively identify the railway scenarios.作者: 外觀 時間: 2025-3-24 17:34 作者: 痛苦一生 時間: 2025-3-24 23:00 作者: FID 時間: 2025-3-25 02:06
https://doi.org/10.1007/978-3-0348-7340-6s COSMIC, are employed for evaluating the ABLH estimation accuracy of COSMIC-2. In the comparison, we can know that the good performance of radio occultation load in COSMIC-2 constellation provides richer and high-quality raw data for atmospheric boundary layer detection. More effective detection qu作者: 引導 時間: 2025-3-25 06:59
Nuclear Medicine — Tool or Specialty?soil moisture retrieval. African soil moisture status was obtained using CYGNSS data from July to December 2018. Finally, the soil moisture retrieval method proposed in this paper was evaluated by comparing with the soil moisture data provided by SMAP. The results show that the soil moisture retriev作者: 權(quán)宜之計 時間: 2025-3-25 09:29
Helmar Bergmann,Helmut Sinzingernde data in 2017 as reference values in comparison with the canonical GPT2w model in spatial interpolation for GGOS (Global Geodetic Observing System) gridded ZHD. The results show that CZHD-H model maintains better performance in spatial interpolation for GGOS gridded ZHD. CZHD-H model has improved作者: AND 時間: 2025-3-25 12:36 作者: Meager 時間: 2025-3-25 17:20 作者: 不舒服 時間: 2025-3-25 23:01
H. Bergmann,A. Kroiss,H. Sinzingerinversion result is improved by 5.76% and 6.21% compared with the inversion results of amplitude and band single parameter, and the RMSE is reduced by 29.55% and 37.10% respectively. The results show that the random forest algorithm used in frequency inversion is more effective than the amplitude an作者: Ambiguous 時間: 2025-3-26 01:29
Advances in Pharmacological Scienceserified by month, as well as the stability and efficiency. The results show that the effect of RBF is best when modeling ZTD with small-size training samples. Among them, the average RMSE of the ZTD models with RBF is 20.8?mm and 20.1?mm for two data-fusion strategies, respectively. The accuracy of 作者: 較早 時間: 2025-3-26 04:23
Ageliki Manetou,Georgios S. Limourisst, various elements are acquired through Google Earth Engine, and the resolution is unified through ArcGIS; Then, the relationship model between the multiple ground-based GPS-IR and related elements is established through the least square support vector machine (LS-SVM), and the modeling effects of作者: Critical 時間: 2025-3-26 11:10 作者: 聯(lián)想記憶 時間: 2025-3-26 12:56
Advances in Pharmacological Sciencese limited satellite signals scenes. Therefore, this paper proposes a train integrity monitoring method based on multi-constellation moving-baseline solution. The first step is to unify the time and space systems, then make full use of the multi constellation carrier phase measurements, and finally e作者: FLAT 時間: 2025-3-26 17:23
China Satellite Navigation Conference (CSNC 2021) Proceedings978-981-16-3138-2Series ISSN 1876-1100 Series E-ISSN 1876-1119 作者: Intruder 時間: 2025-3-26 23:01 作者: esoteric 時間: 2025-3-27 04:50 作者: 鞭子 時間: 2025-3-27 05:48 作者: Gyrate 時間: 2025-3-27 12:52 作者: 潰爛 時間: 2025-3-27 16:31
https://doi.org/10.1007/978-3-0348-7340-6been a difficult point in the field of satellite navigation research. Moreover, atmospheric boundary layer is a key parameter when studying climatology. With the Constellation Observing System for Meteorology, Ionosphere, and Climate (COMSIC)-2 occultation launching in June 2019, it enhances the abi作者: molest 時間: 2025-3-27 19:34
Nuclear Medicine — Tool or Specialty?t significance to study the theory and method of soil moisture detection. Currently, soil moisture detection methods are very rich. As an emerging remote sensing technology, satellite-borne GNSS-R has the advantages of abundant signal sources, low cost and Global coverage, etc. It has attracted peop作者: 媽媽不開心 時間: 2025-3-28 00:40
Helmar Bergmann,Helmut Sinzingerical direction is much greater than that in the horizontal direction. Some shortages still exist in current zenith hydrostatic delay (ZHD) vertical stratification models for China, such as only single gridded data is used for modeling. To address those of drawbacks, a new approach, the sliding windo作者: hemorrhage 時間: 2025-3-28 05:59 作者: Myosin 時間: 2025-3-28 08:56
Advances in Pharmacological Sciencesncy identification based on 50-Hz GNSS displacements of the Sanchaji bridge at Changsha. In the experiment, the Chebyshev filter is used to remove the long-period static component caused by the static displacement and multipath effect, and the ensemble empirical mode decomposition method is used to 作者: 輕浮思想 時間: 2025-3-28 13:55 作者: FORGO 時間: 2025-3-28 18:32
https://doi.org/10.1007/978-3-0348-7772-5 Fourier transform and BP neural network is proposed to solve the problem of periodic fluctuation of monitoring results. Firstly, Fourier transform is used to analyze the spectrum of monitoring results and extract the period and frequency of periodic signals. Then BP neural network is used to model 作者: 傳授知識 時間: 2025-3-28 19:39 作者: FEMUR 時間: 2025-3-29 00:34
H. Bergmann,A. Kroiss,H. Sinzingerabnormal fault models and parameters to join ICAO. The article establishes an equivalent ICAO model with BDS. According to the actual faults that may occur during the navigation signal generation process, the methods are respectively proposed to simulate the digital circuit failure (TMA) caused by t作者: 無法取消 時間: 2025-3-29 06:49
H. Bergmann,A. Kroiss,H. Sinzingercost remote sensing technology, using the interference of GNSS direct and reflected signals to obtain environmental parameters, which can realize non-contact, large-scale, real-time and continuous soil moisture monitoring. In this paper, a random forest algorithm is proposed to conduct soil moisture作者: Exclaim 時間: 2025-3-29 10:07
Advances in Pharmacological Sciencese System (GNSS) signal. In this paper, back-propagation neural network (BPNN), radial basis function (RBF) neural network, and least square support vector machine (LSSVM) algorithm are applied to develop the regional zenith troposphere delay (ZTD) models by merging International GNSS Service ZTD pro作者: Dna262 時間: 2025-3-29 12:28
Ageliki Manetou,Georgios S. Limourisnt, and fire risk forecasting. Global Positioning System Interferometric Reflectometry (GPS-IR) is a new type of remote sensing technology. The signal-to-noise ratio recorded by the measurement receiver can be used to retrieve VWC effectively. Although studies have fully proved that the change of VW作者: Carcinogen 時間: 2025-3-29 19:35
Ageliki Manetou,Georgios S. Limourisutinely used in operational numerical weather prediction models run by major world forecasting centers. The key advantages of using RO data include global coverage, high precision, high vertical resolution, long-term stability and all-weather operation capability and capacity. The latest development作者: 星星 時間: 2025-3-29 20:57 作者: occurrence 時間: 2025-3-30 02:07 作者: 遭受 時間: 2025-3-30 05:02
978-981-16-3140-5Aerospace Information Research Institute 2021作者: euphoria 時間: 2025-3-30 11:51 作者: 粘 時間: 2025-3-30 16:09 作者: V切開 時間: 2025-3-30 17:22
Train Localization Environmental Scenario Identification Using Features Extracted from Historical Daonment is complex and changes with the train movement, buildings, trees, railroad cuts and mountains will block and reflect the GNSS signals, which will bring errors to the GNSS-based train position estimation. This paper proposes a railway scenario identification method based on historical GNSS rec作者: 勤勞 時間: 2025-3-30 23:58
Research on the Method of Precisely Removing Open Water in the Retrieval of Soil Moisture by Spacebot impact on the results of soil moisture retrieval. In order to solve this problem, this paper proposes a method to accurately remove open water based on the geographic coordinates of the mask data, and verifies it using the measured spaceborne data. Firstly, we obtained CYGNSS level 1 data for a pe作者: 使迷惑 時間: 2025-3-31 03:58
Model Establishment of Atmospheric Weighted Mean Temperature in Chongming Eco-Island and Its Applicaelt. Due to the special geographical location of Chongming, it is affected by typhoons almost every year, which have caused serious damage to the ecological environment and economic development. A typhoon often brings a large amount of water vapor. Thus, studying characteristics of water vaper durin作者: committed 時間: 2025-3-31 07:17
Analysis of COSMIC-2 Atmospheric Boundary Layer Detection Abilitybeen a difficult point in the field of satellite navigation research. Moreover, atmospheric boundary layer is a key parameter when studying climatology. With the Constellation Observing System for Meteorology, Ionosphere, and Climate (COMSIC)-2 occultation launching in June 2019, it enhances the abi作者: Decimate 時間: 2025-3-31 10:56
Soil Moisture Retrieval Based on Satellite-Borne GNSS-R Technologyt significance to study the theory and method of soil moisture detection. Currently, soil moisture detection methods are very rich. As an emerging remote sensing technology, satellite-borne GNSS-R has the advantages of abundant signal sources, low cost and Global coverage, etc. It has attracted peop作者: insincerity 時間: 2025-3-31 13:46
A New Grid Model for the Vertical Correction of Zenith Hydrostatic Delay for Chinaical direction is much greater than that in the horizontal direction. Some shortages still exist in current zenith hydrostatic delay (ZHD) vertical stratification models for China, such as only single gridded data is used for modeling. To address those of drawbacks, a new approach, the sliding windo作者: 賠償 時間: 2025-3-31 19:41 作者: Tractable 時間: 2025-4-1 00:24 作者: Indicative 時間: 2025-4-1 05:34
Deformation Measurement Based on the Phase of Reflected Signals of Beidou GEO Satellitesesearchers have begun to work on the phase applications of GNSS reflected signals for deformation measurement. Compared with the pseudorange measurement, the phase measurement can obtain the precision of less than one wavelength, and the phase is more sensitive to the motion of the target. This stud作者: d-limonene 時間: 2025-4-1 07:41
Multi-path Error Correction Method for Slope Monitoring Based on BP Neural Network Fourier transform and BP neural network is proposed to solve the problem of periodic fluctuation of monitoring results. Firstly, Fourier transform is used to analyze the spectrum of monitoring results and extract the period and frequency of periodic signals. Then BP neural network is used to model 作者: 粗鄙的人 時間: 2025-4-1 11:29 作者: auxiliary 時間: 2025-4-1 16:19
Simulation Research on ICAO Model Parameters Based on BDSabnormal fault models and parameters to join ICAO. The article establishes an equivalent ICAO model with BDS. According to the actual faults that may occur during the navigation signal generation process, the methods are respectively proposed to simulate the digital circuit failure (TMA) caused by t
