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 ?
While the LCD displays numerical sensor information such as compass direction angle value, altitude, atmospheric pressure, and temperature, the PRG550-1A1's full auto LED light activates with just a flick of the wrist and operates by Casio's Tough Solar Power technology, allowing readings to be accomplished with ease.
With a growing azimuth direction angle of the polar coordinates it converges to the origin of the coordinate system without ever reaching it.
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).
If a row partly curves, a direction angle between the transplanter and the entire row can't be detected correctly.
XY]: horizontal displacement, S: whole displacement, [alpha]: angle between construction coordinate X and earth coordinate X, F: direction angle of horizontal displacement, N: middle variable, [F.
s] - the mean square error (MSE) of distance measurement ([+ or -]2,0 mm); [alpha] - medium direction angle in the site grid system (45[degrees]); s - average distance to the position point (130/2 = 65 m); [m.
The metallic reinforcement elements of the working crown plies are parallel to each other within each working crown ply and are crossed from one working crown ply to the next, forming with the circumferential direction angles [[alpha].
Another issue is generating the correct vector direction angles for a DCC CMM.

Full browser ?