- Industry: Earth science
- Number of terms: 93452
- Number of blossaries: 0
- Company Profile:
Founded in 1941, the American Congress on Surveying and Mapping (ACSM) is an international association representing the interests of professionals in surveying, mapping and communicating spatial data relating to the Earth's surface. Today, ACSM's members include more than 7,000 surveyors, ...
The calculation of returns in a logical and consistent manner.
Industry:Earth science
Phototriangulation using a stereoscopic plotter or other analog-type device.
Industry:Earth science
That elevation of an assumed, horizontal surface, in the region shown on a set of aerial photographs, which would be projected at the best distance in a stereographic plotter.
Industry:Earth science
The angle, at the center of a partially illuminated body, between the source of light and the observer.
Industry:Earth science
The principal value of a swap transaction, which is not exchanged but is used as a scale factor to translate interest rate differentials into cash settlement payments.
Industry:Earth science
The angular coordinates of a celestial body in a heliocentric coordinate system, referred to the true equinox and true equator at a standard epoch (e.g., of date). True place is calculated from apparent place by removing the effects of nutation. It is calculated from measurements in a topocentric coordinate system by (a) removing the effects of refraction, diurnal aberration and geocentric parallax; (b) removing the effects of annual aberration and annual parallax (distance of the center of the Earth from the center of the Sun); and (c) removing the effects of precession and nutation.
Industry:Earth science
A function U(x,dx/dt,t) having a force f as its gradient, according to the formula f = *Δ <sub>1</sub> U - (d/dt) (*Δ <sub>2</sub> U), in which *Δ <sub>1</sub> denotes the gradient with respect to x and *Δ <sub>2</sub> denotes the gradient with respect to dx/dt.
Industry:Earth science
A technique for determining the direction of an object by comparing the radio signal received, either by scattering from the object or from a transmitter in it, at two different antennas simultaneously.
Industry:Earth science
(1) The number of independent coordinates needed to uniquely determine the location of every particle in a dynamic system. (2) The number of independent coordinates, in a mechanical system, which suffice to describe the motion of the system. If the motion is described by more than this number, relations must exist among the number of coordinates in excess. (3) The number of mutually perpendicular axes about which the rotational axis of a gyroscope is free to rotate. This is a particular case of the definition given above. (4) The number of random variables being considered, minus the number of conditions imposed on these variables. (5) The number of independent variables (unknowns) in a set of equations, minus the number of conditions linking these variables.
Industry:Earth science
