Pitch angle

Pitch angle

Polarimetry

Published in Toru Yoshizawa, Handbook of Optical Metrology, 2015

The toroidal magnetic field is known from the electric current supplied to the toroidal coils. If the magnetic field pitch angle is measured, the poloidal magnetic field and thus the plasma current can be calculated. The plasma current profile can be determined from the magnetic field pitch angles measured at different locations in the plasma. To achieve high stability and confinement in a Tokamak, it is critical to monitor and control the distribution of plasma current.

Deployment optimization for camera network coupling with geographic environment

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Journal Information

Published in Annals of GIS, 2018

Ziran Wang, Meizhen Wang, Xuejun Liu, Yanan Zhang

The camera is a directional sensor, whose coverage is mainly decided by parameters such as location, height, the camera’s inner parameters and its gestures. The camera model described in this paper is shown in Figure 1(a), which is expressed as a tuple ; in this tuple, is the position of the camera’s optical centre in the geographic coordinate system; are, respectively, the azimuth angle and the pitch angle. The azimuth angle is the vertical angle between the north direction line of a particular point and the target direction line in the clockwise direction. The pitch angle is the horizontal angle between the vertical direction line of a particular point and the target direction line in the clockwise direction. are respectively the width, height and focal length of the imaging chip. The quadrilateral in grey in Figure 1(a) is the theoretical coverage of the current camera, which is projected from the pyramid formed by C-D1D2D3D4 to the ground.

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Polarimetry

Deployment optimization for camera network coupling with geographic environment