- 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, ...
An unsuccessful version of Loran-A, in which both envelope and phase of the pulses were matched.
Industry:Earth science
That part of a computer's memory into which numbers or numerically-coded information has been placed and from which they can be later retrieved, but into which no further information can be placed. Usually referred to as ROM.
Industry:Earth science
Trilateration in which the courses are from a few meters to a few hundreds of meters long
Industry:Earth science
(1) The direction in which an antenna is pointed when transmitting to or receiving from a particular element of area. (2) The direction in which an observer must look or an instrument be pointed in order to see something. The term is frequently used in special ephemerides to denote the direction in which an artificial satellite will be observable from a particular spot.
Industry:Earth science
Any instrumental support whose orientation is held fixed with respect to a non-rotating coordinate system. The support should in theory be one which is not rotating with respect to the totality of mass in the universe or with respect to the very distant galaxies. In practice, the requirement is usually weakened to mean fixed with respect to bodies known to be rotating. The usual way
Industry:Earth science
(1) That meridian on which mean solar time is the same as the standard time throughout a particular zone. Throughout most of the world, the standard meridians are those whose longitudes are exactly divisible by 15.
Industry:Earth science
A map printed in two complementary colors (such as red and blue green) in such a way that, when viewed through spectacles fitted with filters of corresponding colors, the map appears to have depth, i.e., show the relief in three dimensions.
Industry:Earth science
A map representing the surface of the land or the floor of the oceans. In addition to representing relief, physical maps show some natural phenomena such as oceanic currents, swamps, sands and deserts. Man made structures or vegetation are not shown.
Industry:Earth science
A short, vertical shaft allowing access to an underground passage such as a sewer or tunnel carrying telephone or power lines. The opening at ground level is usually covered by a cast iron or steel plate.
Industry:Earth science
A land measure of various sizes, used now or formerly in various Germanic countries, and meaning originally the amount of land one team or man could plow or mow in one morning. The old Dutch morgen was equal to about 8 500 square meters.
Industry:Earth science
