Results 21 to 30 of about 44,738 (261)

A Novel Framework for Anomaly Detection for Satellite Momentum Wheel Based on Optimized SVM and Huffman-Multi-Scale Entropy

Entropy, 2021
The health status of the momentum wheel is vital for a satellite. Recently, research on anomaly detection for satellites has become more and more extensive. Previous research mostly required simulation models for key components.
Yuqing Li, Mingjia Lei, Pengpeng Liu, Rixin Wang, Minqiang Xu   +4 more
doaj   +1 more source

Influence of topography and canopy cover on argos satellite telemetry performance

Wildlife Society Bulletin, 2012
Environmental variables can affect performance of global positioning system (GPS) telemetry; however, similar assessments have not been reported for Argos satellite telemetry. We used a stratified random design and linear mixed‐effects models to evaluate
Joel D. Sauder, Janet L. Rachlow, Michelle M. Wiest   +2 more
doaj   +1 more source

Model‐based clustering reveals patterns in central place use of a marine top predator

Ecosphere, 2020
Satellite telemetry data are commonly used to quantify habitat selection, examine animal movements, and delineate home ranges. These data also contain valuable information concerning dens, nests, roosts, and other central places that are often associated
Brian M. Brost, Mevin B. Hooten, Robert J. Small   +2 more
doaj   +1 more source

Research on fault detection and principal component analysis for spacecraft feature extraction based on kernel methods

Open Astronomy, 2022
Satellite anomaly is a process of evolution. Detecting this evolution and the underlying feature changes is critical to satellite health prediction, fault early warning, and response.
Fu Na, Zhang Guanghua, Xia Keqiang, Qu Kun, Wu Guan, Han Minzhang, Duan Junru   +6 more
doaj   +1 more source

Validation and Evaluation of Ocean Calibration Accuracy of FY-3G Precipitation Measurement Radar

应用气象学报
FY-3G precipitation satellite launched in April 2023 is the first dedicated precipitation measurement satellite in China. The dual-frequency precipitation measurement radar (PMR) is the core instrument on the satellite.
Yuan Mei, Yin Honggang, Shang Jian, Jiang Baisen, Yang Runfeng, Gu Songyan, Zhang Peng   +6 more
doaj   +1 more source

Station-Keeping Maneuvers for a Geostationary Satellite Using Linear Quadratic Regulator [PDF]

Journal of Astronomy and Space Sciences, 1997
This paper applied one of the well-known optimal control theory, namely, linear quadratic regulator(LQR), to the station-keeping maneuvers(SKM) for a geostationary satellite.
Sunik Lee, Kyu-Hong Choi, Sanguk Lee
doaj  

A Deep Learning Anomaly Detection Framework for Satellite Telemetry with Fake Anomalies

International Journal of Aerospace Engineering, 2022
Reducing satellite failures and keeping satellites healthy in orbit are important issues. Current satellite systems have developed modules to detect anomalies on board.
Yakun Wang, Jianglei Gong, Jie Zhang, Xiaodong Han   +3 more
doaj   +1 more source

Accurate Satellite Operation Predictions Using Attention-BiLSTM Model with Telemetry Correlation

Aerospace
In satellite health management, anomalies are mostly resolved after an event and are rarely predicted in advance. Thus, trend prediction is critical for avoiding satellite faults, which may affect the accuracy and quality of satellite data and even ...
Yi Peng, Shuze Jia, Lizi Xie, Jian Shang
doaj   +1 more source

Quality Analysis of Telemetry Tracking and Command at Ground Stations using the Association Rule Mining Approach

Journal of ICT Research and Applications, 2023
LAPAN built several remote ground stations to support the telemetry tracking and command (TTC) system for the LAPAN-A2 and LAPAN-A3 satellites. These remote ground stations are located in Kototabang/KT (West Sumatra), Biak/BK (Papua), Parepare/PR (South
Rizki Permala, Nurrochman Ferdiansyah, Nurul Muhtadin   +2 more
doaj   +1 more source

Nimbus Telemetry [PDF]

, 1962
Nimbus satellite - pulse-code-modulated telemetry ...
Adkins, F. L., Griffin, C. E.
core   +1 more source