Romische Geschichte (4) - 2 Angebote vergleichen

Von Händler/Antiquariat, BuySomeBooks [52360437], Las Vegas, NV, U.S.A.
This item is printed on demand. Paperback. 48 pages. OCLC Number: 316886023 Excerpt: . . . Power for the system is provided by a Honda EU1000I generator that is mounted at the front of the ATV. The generator is connected in series to an APC Back-UPS 650 uninterruptible power supply and a GFCI ( ground-fault circuit interrupter ). Since the completion of this work the GPS has been upgraded to a Javad Legacy, and the ATV was replaced by a small tractor. GPS-positioning The positioning of the data was accomplished using an Ashtech G12E-RTK ( real-time kinematic ) system and an incremental optical encoder. The G12E-RTK GPS ( GPS only ) system is capable of producing sub-meter accuracy typically on the order of 20 cm, with accuracy to 1 cm in good conditions ( Magellan, 1998 ). Good conditions means an open sky, with an unrestricted view of seven or more GPS satellites. The RTK system uses a carrier signal in addition to the code signal from the satellites. The carrier signal is transmitted from a GPS base station through a radio link and is received at the rover ( remote GPS receiver ). The rover GPS antenna is mounted on a mast at the front of the fiberglass VETEM cart and is linked to the GPS receiver by a coaxial cable. The GPS antenna is not mounted in the center of the Tx and Rx array because the coaxial cable would cause coupling interference with the Rx. Recorded positions are numerically shifted to the center of the Tx and Rx antennas during data processing. The GPS rover receiver is controlled by the computer and is set up to provide information on an as-needed basis ( queried by the computer ). The GPS base station is set up over a known control point and the known coordinates are entered. At the beginning of each day the GPS base station is started and is left to operate unattended for the duration of data collection. The GPS provides a message containing time, position, and system information ( number of satellites, precision, error ). The message is used to monitor the type of GPS position that is b. . . This item ships from La Vergne,TN.

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Jared D. Abraham David Vong Smith, Titus Livius, Paperback, English-language edition, Pub by General Books LLC.