A CDMA-Based Polar Observation System Using Quasi-Zenith Satellite Systems

2004 ◽  
Author(s):  
Tadashi Minowa ◽  
Shin-ichi Yamamoto ◽  
Masato Tanaka
Keyword(s):  
Observation System ◽  
Satellite Systems

scholarly journals Mapping South Baltic Near-Shore Bathymetry Using Sentinel-2 Observations

2017 ◽  
Vol 24 (3) ◽  
pp. 15-25 ◽  
Author(s):  
Andrzej Chybicki
Keyword(s):  
European Space Agency ◽  
Satellite Observation ◽  
Optical Observations ◽  
Observation System ◽  
The South ◽  
Single Beam ◽  
Satellite Systems ◽  
In Situ Data ◽  
Near Shore ◽  
Sentinel 2

Abstract One of the most promising new applications of remote observation satellite systems (RO) is the near-shore bathymetry estimation based on spaceborn multispectral imageries. In recent years, many experiments aiming to estimate bathymetry in optically shallow water with the use of remote optical observations have been presented. In this paper, optimal models of satellite derived bathymetry (SDB) for relatively turbid waters of the South Baltic Sea were presented. The obtained results were analysed in terms of depth error estimation, spatial distribution, and overall quality. The models were calibrated based on sounding (in-situ) data obtained by a single-beam echo sounder, which was retrieved from the Maritime Office in Gdynia, Poland. The remote observations for this study were delivered by the recently deployed European Space Agency Sentinel-2 satellite observation system. A detailed analysis of the obtained results has shown that the tested methods can be successfully applied for the South Baltic region at depths of 12-18 meters. However, significant limitations were observed. The performed experiments have revealed that the error of model calibration, expressed in meters (RMSE), equals up to 10-20% of the real depth and is, generally, case dependent. To overcome this drawback, a novel indicator of determining the maximal SDB depth was proposed. What is important, the proposed SDB quality indicator is derived only on the basis of remotely registered data and therefore can be applied operationally.

Development system of metrological maintenance for radio-navigation fields of satellite systems

2001 ◽  
Vol 7 (4) ◽  
pp. 122-125
Author(s):  
V.N. Roman'ko ◽  
◽  
E.N. Khomyakov ◽  
S.T. Cherepkov ◽  
◽  
...  
Keyword(s):  
Development System ◽  
Satellite Systems ◽  
Radio Navigation

Network and Protocol Architectures for Future Satellite Systems

2017 ◽  
Author(s):  
Tomaso de Cola ◽  
Alberto Ginesi ◽  
Giovanni Giambene ◽  
George C. Polyzos ◽  
Vasilios A. Siris ◽  
...  
Keyword(s):  
Satellite Systems

Motion Estimation byUsing Stereo Vision Analysis For Underwater Observation System

2019 ◽  
Author(s):  
Masyhuri Husna Binti Mazlan ◽  
Morisawa Daisuke ◽  
Koike Yoshikazu ◽  
Shimizu Junji ◽  
Enomoto Eriko ◽  
...  
Keyword(s):  
Motion Estimation ◽  
Stereo Vision ◽  
Observation System ◽  
Underwater Observation

Analysis of the horizontal structure of a measurement and control geodetic network based on entropy

2013 ◽  
Vol 62 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Maria Mrówczyńska
Keyword(s):  
Geodetic Network ◽  
The State ◽  
Observation System ◽  
Optimum Number ◽  
Optimum Structure ◽  
Horizontal Structure ◽  
The Difference ◽  
And Control ◽  
Measurement And Control ◽  
Horizontal Displacements

Abstract The paper attempts to determine an optimum structure of a directional measurement and control network intended for investigating horizontal displacements. For this purpose it uses the notion of entropy as a logarithmical measure of probability of the state of a particular observation system. An optimum number of observations results from the difference of the entropy of the vector of parameters ΔHX̂ (x)corresponding to one extra observation. An increment of entropy interpreted as an increment of the amount of information about the state of the system determines the adoption or rejection of another extra observation to be carried out.

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