Results 21 to 30 of about 63,794 (294)
Range-only underwater target localization : error characterization [PDF]
, 2016 Locating a target from range measurements using only one mobile transducer has been increased over the last years. This method allows us to reduce the high costs of deployment and maintenance of traditional fixed systems on the seafloor such as Long
Gomáriz Castro, Spartacus +5 more
core +2 more sources
Precise Position Estimation Using Smartphone Raw GNSS Data Based on Two-Step Optimization
Sensors, 2023 This paper presents a high-precision positioning method using raw global navigation satellite system (GNSS) observations from smartphones in the Google smartphone decimeter challenge (GSDC).
Taro Suzuki
doaj +1 more source
Journal of Computer Networks and Communications, 2023 With the continuous development of mobile communication and satellite navigation technologies, the positioning requirements of 5G smart communication base stations are becoming higher and higher. With the opening of GNSS raw observation data, research on
Jianmin Wang, Yan Wang
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A Graphical Approach to GPS Software-Defined Receiver Implementation [PDF]
, 2013 Global positioning system (GPS) software-defined receivers (SDRs) offer many advantages over their hardwarebased counterparts, such as flexibility, modularity, and upgradability.
Bhatti, Jahshan A. +2 more
core +1 more source
Single camera 3D planar Doppler velocity measurements, using two frequency planar Doppler velocimetry (2v-PDV) and imaging fibre bundles [PDF]
, 2006 A modified Planar Doppler Velocimetry (PDV) technique, two frequency PDV (2v-PDV), is described that allows measurements of the velocity field over a plane defined by a laser light sheet using sequential illumination of the flow with two closely ...
Charrett, Thomas O. H. +2 more
core +1 more source
False-positive diagnosis of pulmonary hypertension by Doppler echocardiography [PDF]
European Respiratory Journal, 1998 A 37-yr-old female presented with a history of several months of exertional dyspnoea. A diagnosis of primary pulmonary hypertension was suspected on the basis of a negative extensive cardiorespiratory work-up with a systolic pulmonary artery pressure of 41-46 mmHg calculated from repeated measurement of the maximum velocity of tricuspid regurgitation ...
Vachiery, Jean-Luc +3 more
openaire +2 more sources
Development of a low profile laser Doppler probe for monitoring perfusion at the patient – mattress interface [PDF]
, 1988 The clinical importance of pressure ulcers is reviewed confirming the need for continuous monitoring of skin blood perfusion at the patient – mattress interface.
A. CALZOLARI +9 more
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New method for airborne SAR image positioning
The Journal of Engineering, 2019 Synthetic aperture radar (SAR) geometric positioning obtains the geodetic coordinates of each pixel in a SAR image. However, due to the changes in geometry, position and attitude angle of the sensor and the influence factors such as topography ...
Ding Wang, Aifang Liu, Xue Xia
doaj +1 more source
Accuracy of Doppler Determinations of Station Positions [PDF]
Symposium - International Astronomical Union, 1972 Locations of Doppler satellite observing stations have been revised to obtain a set which is more self-consistent and more consistent with the CIO pole. Residuals of satellite observations for 1970 have been analyzed using the new coordinates to determine mean and standard errors for five days of observations of latitude versus station, time of day ...
openaire +1 more source
Analysis of Ionospheric Scintillations using Wideband GPS L1 C/A Signal Data [PDF]
, 2004 A non-real-time GPS receiver has been developed and tested for use in scintillation analysis. The receiver consists of a digital storage receiver and non-real-time software acquisition and tracking algorithms.
Humphreys, Todd E. +3 more
core +1 more source