搜索结果: 1-15 共查到“工学 Ionospheric”相关记录39条 . 查询时间(0.046 秒)
MONITORING IONOSPHERIC VARIATION FOR A DEFINITE PERIOD TIME IN TURKEY
Ionosphere Total Electron Content GNSS
2016/1/15
Ionosphere has been studied by a number of scientists in recent years. Since GPS observations cannot provide TEC value directly, it can be estimated from combination of observations. In this study TEC...
Investigation into the problem of characterization of the HF ionospheric fluctuating channel of propagation: construction of a physically based HF channel simulator
ionosphere Hf channel simulator
2015/9/14
A wideband HF simulator has been constructed that is based on a detailed physical model. It can generate an output giving a time realization of the HF wideband channel for any HF carrier frequency and...
Ionospheric error analysis in gps measurements
Differential GPS error sources ionospheric errors carrier-phase positioning Geometry-Free Linear Combination RTK GPS
2015/9/1
The results of an experiment aimed at evaluating the effects of the ionosphere on GPS positioning applications are presented in this paper. Specifically, the study, based upon a differential approach,...
Ionospheric turbulence from ground-based and satellite VLF/LF transmitter signal observations for the Simushir earthquake (November 15, 2006)
VLF/LF signal propagation Eartquake precursors
2015/8/24
Signals from very low frequency (VLF)/ low frequency (LF) transmitters recorded on the ground station at Petropavlovsk-Kamchatsky and on board the French DEMETER satellite were analyzed for the Simush...
Application of empirical mode decomposition to very low frequency signals for identification of seismic-ionospheric precursor phenomena
Earthquake Precursor Phenomena Empirical Mode Decomposition
2015/8/24
This study investigates the application of empirical mode decomposition to signals from very low frequency transmitters in Europe that were received in Thessaloniki, Greece, to provide a method for de...
The most demanding application of wide area di erential corrections to GPS is vertical positioning of aircraft on precision approach. Here the Wide Area Augmentation System (WAAS) combines accuracy re...
Ionospheric Estimation and Integrity Threat Detection
Ionospheric Estimation Integrity Threat Detection
2015/6/29
A full realization of the Wide Area Augmentation System (WAAS) is intended to provide aircraft guidance throughout the en route, terminal, non-precision and precision approach phases of ight.
A Proposed Signal Design for GNSS2:The Use of Faster and Longer Codes to Provide Real-Time Single Frequency Ionospheric Measurements
Signal Design GNSS Longer Codes Real-Time Single Frequency Ionospheric Measurements
2015/6/29
The design of GNSS2 presents the international navigation community a unique opportunity to design a signal for more precise positioning than is currently available with GPS and GLONASS. Faster and lo...
Analytical and Experimental Observations of Ionospheric and Tropospheric Decorrelation Effects for Differential Satellite Navigation during Precision Approach
Ionospheric Tropospheric Decorrelation Effects Differential Satellite Navigation Precision
2015/6/29
The introduction of the Global Positioning System(GPS) ushered in a new era of affordable precise navigation.Differential GPS (DGPS) corrections have reduced positioning errors from about 100 meters t...
The Effects of Local Ionospheric Decorrelation on LAAS:Theory and Experimental Results
Local Ionospheric Decorrelation LAAS Theory Experimental Results
2015/6/29
Solar cycle 23 is expected to reach a maximum in the year 2000. This has produced a recent flurry of research about the possible adverse effects of the ionosphere on the millions of GPS users. The int...
Robust Detection of Ionospheric Irregularities
Robust Detection Ionospheric Irregularities
2015/6/29
The Wide Area Augmentation System (WAAS) will provide real-time differential GPS corrections and integrity information for aircraft navigation use. The most stringent application of this system will b...
The ionosphere is the largest remaining error source affecting GPS. It also has some of the least predictable spatial and temporal variations. As such the ionosphere becomes the determining factor in ...
Assessment of Ionospheric Impact on LAAS Using WAAS Supertruth Data
Ionospheric Impact LAAS WAAS Supertruth Data
2015/6/26
In order to reflect the impact of spatial ionospheric gradients on Local Area Augmentation System (LAAS) users, the LAAS Ground Facility (LGF) broadcasts a conservative standard deviation (σvert_iono_...
Using WAAS Ionospheric Data to Estimate LAAS Short Baseline Gradients
WAAS Ionospheric Data Estimate LAAS Short Baseline Gradients
2015/6/26
The Local Area Augmentation System (LAAS) is intended to provide real-time differential GPS corrections with the high accuracy, availability, and integrity required for Category II/III landings. In or...
Ionospheric Scintillation Effects on Single and Dual Frequency GPS Positioning
Ionospheric Scintillation Effects Dual Frequency GPS Positioning
2015/6/26
The low latitude ionosphere poses a challenge to both GPS users and Satellite-Based Augmentation System(SBAS) providers. Single and dual frequency GPS receivers used in low-latitude regions can suffer...