GPS World - February 2008 - (Page 23)

TRIUMPH-4X… The Cluster RTK Conventional RTK uses one base and one rover yielding only one baseline with no checks and balances. Surveyors appreciate the power of networks, where many points and repeated measurements along with network adjustment remove outliers and give more accurate results. To improve the reliability of RTK, some users employ data from more than one base. Multiple bases are rare and not conveniently available. In a giant step forward along with introducing Triumph-4X, we also introduce Cluster RTK, or 4x4 RTK, where sixteen baselines are processed in every single RTK measurement. For the first time in the history of GNSS, the power of survey techniques and network adjustments comes to RTK but without the burdens and complications. The operation is similar to conventional RTK. Surveyors and geodesists can now trust RTK measurements while improving accuracy, reliability and availability. Now when we say 20 Hz RTK, we mean measuring 16 baselines of 8 points and performing equivalent of geodetic network adjustment on 16 baselines, removing outliers and providing reliable geodetic quality RTK solutions 20 times per second! 4x4 cluster RTK does not need a truck load of expensive equipment, multiple field operators, and complicated procedures. It is even simpler than conventional 1x1 RTK because you even do not need to level your pole! 4 base — 4 rover, 16 baseline GNSS RFx4 and Communication Board with on-board SIM Card GNSS Receiver and Power Board with on-board Memory User Accessible SIM Card SIM Card Door Communication and Power Ports IMU Unit Bluetooth / WiFi Antenna Quick Release with Lock Integrated UHF / GSM Antenna 5/8-11" Mounting Thread Ground Plane Internal GNSS Antenna Rechargeable Li-Ion Battery Pack Guard Bumper External GNSS Antenna Connectors 5 LEDs On/Off and Control Buttons and LEDs 4X4 ALL WILL DRIVE RTK! One base—one rover, one baseline Triumph-4x is equivalent of 4 independent Triumph-1 receivers packaged in the same small box. Furthermore, these 4 independent receivers are operating synchronously using the same local oscillator. A central processor coordinates internal activities of these four receivers as well as communications and data transmission with outside. And all is done with a single Triumph Chip inside. This is why it is neither heavy nor expensive. One Triumph-4X base and one rover results in a 16-baseline RTK system. While systematic and correlated errors can be removed in single RTK systems, the uncorrelated errors degrade the RTK accuracy. In Triumph 4x4 systems the uncorrelated (random) errors are reduced significantly. This improved accuracy and reliability is especially important in critical applications like machine control. The RTK Umbrella To make handling of the three additional antennas easy we have designed the RTK Umbrella. The receiver is mounted in the center and three small antennas on three folding arms. It is easy to store, transport and use in the field. The RTK Caddy is especially helpful when roving with Triumph-4X. The receiver also includes an IMU consisting of three accelerometers and three gyros. Combining a four-GNSS-receiver system with an IMU provides an extremely powerful tool in providing positioning solutions in most severe and adverse conditions. In Triumph-4X you do not need to level the pole. The four-antenna system and the IMU will determine the inclination and adjust the calculated position accordingly. In areas under canopy and foliage you get much better chance because at least one of the 16 baselines may provide a solution. Triumph-4X can also be used in a more general configuration to determine orientation or mounted in different sections of moving platforms in machine control applications. Triumph-4X has integrated Inertial Measurement Unit

Table of Contents Feed for the Digital Edition of GPS World - February 2008

GPS World - February 2008 Contents Out in Front Expert Advice Galileo's Second Coming Soon UPS First to Use ADS-B European Industry Group Galileo Validation 2008 Antenna Survey Tsumani Detection by GPS Classifieds Advertisers Index Seen + Heard

GPS World - February 2008

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