A Novel Geometry-free and Geometry-based Combined TCAR Method: Preliminary Performance Analysis for BeiDou System

2017 ◽  
Author(s):  
Chun Jia ◽  
Liang Li ◽  
Lin Zhao ◽  
Zeyu Xin
Keyword(s):  
Performance Analysis ◽  
Beidou System

scholarly journals Performance Analysis of Ionosphere Monitoring with BeiDou CORS Observational Data

2014 ◽  
Vol 67 (3) ◽  
pp. 511-522 ◽  
Author(s):  
Weiming Tang ◽  
Lei Jin ◽  
Kun Xu
Keyword(s):  
Performance Analysis ◽  
Global Positioning System ◽  
Lower Latitude ◽  
Electron Content ◽  
Positioning System ◽  
Total Electron ◽  
Latitude Station ◽  
Global Positioning ◽  
Ionosphere Monitoring ◽  
Beidou System

This paper focuses on the performance analysis of ionosphere monitoring using the measurements from a BeiDou Continuously Operating Reference Stations (CORS) network. Combined pseudo-range and carrier phase observations are used to estimate total electron content (TEC) and the hardware delay deviation is also computed. Using the observations from five BeiDou CORS in China, the TEC monitoring results were obtained from each station and compared with GPS monitoring results and also those from the Global Ionosphere Maps (GIM) model. Numerical computation shows that the BeiDou system has the ability to precisely detect the TEC diurnal variation trend on each station. The Residual Mean Square (RMS) difference between the BeiDou and the GIM model at a higher latitude station is about four TEC Units (TECU), while the RMS difference between the GPS and the GIM is about three TECU; at a lower latitude station this difference increases to six TECU for BeiDou and four TECU for the Global Positioning System (GPS); at the lowest latitude station in this study, the differences for both systems are about six TECU.

Performance Analysis of Application Layer FEC to Disaster Warning Distribution Based on COMPASS/Beidou

2011 ◽  
Vol 130-134 ◽  
pp. 3855-3858
Author(s):  
Rui Xue ◽  
Rui Xue Cui ◽  
Xiao Ru Li ◽  
Tong Zhou
Keyword(s):  
Performance Analysis ◽  
Navigation System ◽  
Distribution System ◽  
Satellite Navigation ◽  
Transmission Capacity ◽  
Application Layer ◽  
Satellite Navigation System ◽  
Blind Zone ◽  
Beidou System ◽  
Simulation Results

The COMPASS/Beidou Satellite Navigation System is no-blind zone for China and limited transmission capacity. It is critical for increasing the performance of disaster warning distribution by the COMPASS/Beidou system. By further analyzing the characteristics of transmission of COMPASS/Beidou, we find the method of solving that problem and also introduce some optimizations into the algorithm. The algorithm is based on application layer FEC to achieve the warning transmission probabilities. Simulation results show that the new scheme can efficiently be used disaster warning distribution system.

Analisis Sikap dan Kepuasan Petani dalam Menggunakan Benih Kelapa Sawit (Elaeis guineensis) Bersertifikat di Kabupaten Labuhan Batu Utara

AGRIMOR ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 40-44
Author(s):  
Myrna Pratiwi Nasution ◽  
Laura Juita Pinem
Keyword(s):  
Performance Analysis ◽  
Elaeis Guineensis

Produktivitas tanaman kelapa sawit sangat dipengaruhi oleh kualitas benih yang digunakan. Pemakaian benih kelapa sawit bersertifikat dipercayai oleh petani yang kritis dalam memberikan produktivitas tanaman kelapa sawit yang bermutu dan kontinyu. Sikap dan kepuasan petani dalam menggunakan benih kelapa sawit bersertifikat merupakan hal yang perlu dicermati untuk memahami keinginan petani. Penelitian ini dirancang untuk mengamati hal tersebut. Sikap petani dianalisis dengan menggunakan pendekatan multiatribut fishbean sedangkan kepuasan dianalisis dengan menggunakan Important Performance Analysis (IPA) dan Customer Satisfied Index (CSI). Berdasarkan penelitian diketahui bahwa atribut-atribut yang menentukan sikap dan kepuasan petani adalah hasil panen, ketahan terhadap hama dan penyakit, umur tanaman, daya tumbuhbenih, efisiensi penggunaan pupuk, jenis varietas, ukuran benih, sertifikasi benih, harga benih, harga Tandan Buah Segar (TBS), kemudahan dalam akses benih, stok benih, kemudahan dalam menjual TBS, dan promosi toko.Analisis multiatribut Fishbeinmenunjukkan sikap netral terhadap benih kelapa sawit bersertifikat (76 persen). Sementara hasil CSI menunjukkan bahwa 70.04 persen petani merasa puas atas atribut-atribut pada benih kelapa sawit bersertifikat.

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