A short character string (approximately 10characters, but preferably 6 characters - more only if absolutely requiredfor clarity) which can be used to label a y-axis for a plot or to provide aheading f
or a data listing.
The angular distance from the North point eastward to the intersection of the horizon with the vertical circle passing through the object. Azimuth is 0° for an object due north, 90° due east, 180° due
south, and 270° due west. Altitude and azimuth constitute the horizon coordinate system.
The angle between the projection into the i-jplane of a position or measured vector and the i-axis of the coordinatesystem. Mathematically defined as arctan(j/i). This term could be alsoapplied to ang
les measured in different planes, for example the IMF clockangle defined as arctan(|By|/Bz).