Abstract: A device designed for the three-dimensional geometrical detection of an environment includes at least one inertial measurement system for provisionally calculating a trajectory of the detection device. The device is calibrated by steps of: (a) positioning and/or orienting the detection device in a position and/or orientation with respect to at least one reference point characterized by at least one predefined relative coordinate, or determining at least one relative coordinate which characterizes the position and/or the orientation of the detection device relative to at least one reference point; (b) determining at least one error variable which characterizes the deviation of the relative coordinate in accordance with step (a) from the relative coordinate(s) provisionally calculated by the inertial measurement system; and (c) if the error variable fulfills a predefined correction criterion, correcting the provisional trajectory.

Abstract: A device designed for the three-dimensional geometrical detection of an environment includes at least one inertial measurement system for provisionally calculating a trajectory of the detection device. The device is calibrated by steps of: (a) positioning and/or orienting the detection device in a position and/or orientation with respect to at least one reference point characterized by at least one predefined relative coordinate, or determining at least one relative coordinate which characterizes the position and/or the orientation of the detection device relative to at least one reference point; (b) determining at least one error variable which characterizes the deviation of the relative coordinate in accordance with step (a) from the relative coordinate(s) provisionally calculated by the inertial measurement system; and (c) if the error variable fulfills a predefined correction criterion, correcting the provisional trajectory.

Abstract: The method of precise position determination, in particular for geodetic positioning by means of carrier-frequency phase-difference measurement on GPS satellites, uses a double difference (.DELTA..phi..sub.12.sup.nm (k)) of a measured phase values, forms an initial solution for a position vector (x.sub.jc) by means of a compensation calculation, and actual phase ambiguities (x.sub.jN) and then integer alternative phase ambiguities (x.sub.jA).A rapid reduction in the number of alternative phase ambiguities (x.sub.jA) to be processed and automatic statistical protection of the results is achieved by means of special statistical selection tests, using a corresponding cofactor matrix (Q.sub.xxj) and an a posteriori rms error (m.sub.0s) of the initial solution.In this way, the required number of satellites (4 to 5) observed and the observation duration (a few minutes) can be reduced considerably, likewise the computer cost. Operator decisions are eliminated.

Abstract: A terrestrial surveying system comprising an electro-optic total station (1) for combined measurement of angle and distance and a connection to data storage (11) or data processing devices (20), the total station (1) and at least one portable position-measuring unit, which is separated spatially from the total station and equipped with a receiver (3) for a satellite position-measuring system, are connected to one another through a wireless data transfer device (12, 13). The data processing device is preferably set up for determining coordinates, for coordinate transformation from the satellite position-measuring system to the terrestrial coordinate system of the total station and for consistency checking of the data determined.