Direction Angle

Direction Angle

 

an angle that characterizes the direction of an arbitrary straight line with respect to an initial direction, particularly with respect to a coordinate axis. In geodesy, a distinction is made between a direction angle on an ellipsoid and a direction angle in a plane (of a projection or of a topographical map). In a plane (Figure 1), the direction angle α12, which at the point P1 has the direction P1P2 to the point P2, is defined as the angle at P1 (in a clockwise direction) between the straight line parallel to the .Y-axis and the directed line P1P2. The direction angle is a basic concept in geodesy and is also used in artillery, navigation, and other fields.

Figure 1

References in periodicals archive ?
The range of simulations allows consideration of "under-merged" plumes with low plume cone angle and high plume direction angle, or "over-merged" plumes with high plume cone angle and low plume direction angle.
In this paper, a FOPI controller and a well-tuned conventional PI controller are applied to experimental setup of four-wheel skid-steering mobile robot for speed and direction angle control, respectively.
A], [beta], [alpha], and [psi] represent the speed of the UVS, actual wind speed, the actual wind direction angle between [V.
Let a be a point in R2 , and n(8) = ( cos(8), sin(8)) be a unit vector in R2 , where 8 is direction angle.
However, the model requires precise equipment, and some useful propagation parameters cannot be obtained in the measure, such as direction of arrival, distribution of the direction angle of arrival and angular spread.
The average bistatic NRCS results versus scattering angles from linear, CWM and Creamer (2) sea surfaces for indent angles of 0[degrees] and 60[degrees] in wind direction angle of 45[degrees] are shown in Figures 5(a), (b) (wind speed of 3 m/s).
Two six-port networks are used to determine the beam direction angle.
Let us assume that connecting traverse passes via points P and Q that form a baseline (with direction angle [[alpha].
Under the same initial phase of the excitation signal, but with different excitation amplitudes along the x and y directions, the results change both in direction angle of the part motion and in covered distance towards the centre of the steady trajectory.
Arithmetic means ([micro]m) of the surface roughness values according to the test variables Cutting Operation Rake Feed speed Arithmetic direction angle (m/min) Means ([degrees]) Ra ([micro]m) 6 4,58 15 12 5,76 18 6,07 24 6,35 Radial Planing 20 6 3,86 12 5,16 18 5,68 24 6,18 25 6 4,46 12 5,19 18 6,47 24 6,85 Tab.
Step 5: Find the direction angle (Direction cosine) from equation number (7 & 8).

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