GPS World, October 2009

p STEALTH mounted on stretchable belt and helmet mounted GNSS antenna PHOTO It includes a multi channel L1 OEM V1 GPS GLONASS unit and a proprietary embedded system to control power management data storage and operation on the slope in two modes by the skier in training mode and by an instructor to position gates along the course Operation must be feasible with minimal training User interaction occurs through one button with two lights indicating operating status Th e raw navigation code and carrier phase data is recorded for postmission use as real time operation is not required for the training of alpine skiers High Elevation Mask To obtain the highest possible level of accuracy and repeatability for the system the system is operated in differential mode with a reference station set up at a convenient location on the course In mountainous regions where training is typically conducted slopes of 35 degrees are common and performance must be maintained under these conditions To provide the best possible performance in environments where high elevation mask angles will be encountered while the skier is also subjected to varying orientations it was necessary to select a high performance yet compact antenna Additionally while the system was initially developed using GPS alone it now includes both GPS and GLONASS to provide optimal performance in the aforementioned challenging environments GPS GLONASS antennas weighing less than 150 grams with a diameter of 5 centimeters and thickness of 14 cm are mounted on the helmet Th e current autonomous internal power typically ranges between 5 and 8 hours under low temperature GNSS Applications ON THE EDGE ski conditions Th e removable data storage capacity is 24 hours Th e GNSS data is post processed using PLANSoft a kinematic carrier phase software that processes GPS and GLONASS data using a fi xed integer carrier phase ambiguity resolution approach O M N I S T A R H I G H P E R F O R M A N C E T M D G P S B R I N G I N G D E C I M E T E R A C C U R A C Y W I T H I N R E A C H Introducing OmniSTAR High Performance HP our revolutionary new DGPS system that redefines the standard for differential correction OmniSTAR has developed cost effective reliable real time corrections enabling high accuracy applications over entire continents without deploying local base stations Our innovative HP signal provides five times the accuracy of standard DGPS for horizontal accuracy of 10 15 cms HP means a wide area solution offering previously unobtainable levels of accuracy opening the door for high precision uses such as auto steering guidance and automation of agri vehicles increased hit probability for GIS utilities rough grading for construction applications survey projects oil exploration aerial photogrammetry and more We just raised the bar on accuracy and reliability but its way within your reach OmniSTAR HP Others promise we deliver Contact us for more information www omnistar com E x p e c t h i g h p e r f o r m a n c e 2005 OmniSTAR www gpsworld com October 2009 GPS World 29