Receiver position in latitude, longitude, and altitude.The navigation data contains following information: The acquisition performance can be improved significantly if the host initializes the receiver with a rough estimate of time and user position.Īs soon as GPS signal is acquired and tracked, the HI-204III-USB will transmit valid navigation information through its serial interface. The first position fix may take up to 50 sec searching the sky for the GPS signal.
If the receiver is transported over a large distance across the globe, cold-start automatic-locate sequence is invoked. The receiver uses the latest stored position, satellite data, and current RTC time to achieve rapid GPS signal acquisition and fast TTFF. After receiver position has been calculated, valid position, velocity and time information are transmitted through the on board serial interface. Under normal open-sky condition, position-fix can be achieved within approximately 35 seconds (within 10 seconds if valid ephemeris data is already collected from recent use). Upon power up, after initial self-test has completed, the HI-204III-USB will begin satellite acquisition and tracking process. 4000 simultaneous time-frequency search bins.Satellite-based augmentation systems, such as WAAS and EGNOS, are supported to yield improved accuracy. Tracking sensitivity of -159dBm offers good navigation performance even in urban canyons having limited sky view. It's 20 parallel channels and 4000 search bins provide fast satellite signal acquisition and short startup time. The HI-204III-USB is optimized for applications requiring good performance, low cost, and maximum flexibility suitable for a wide range of OEM configurations including handhelds, sensors, asset tracking, PDA-centric personal navigation system, and vehicle navigation products. He receiver continuously tracks all satellites in view and provides accurate satellite positioning data. Fast Acquisition Enhanced Sensitivity 20 Channels “All-In-View” Tracking GPS Sensor Module.
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