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sensors:gnss:low_latency [2012/11/07 11:40] karina |
sensors:gnss:low_latency [2021/08/14 04:21] |
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- | ==== Low latency RTK mode ==== | ||
- | The Low Latency positioning mode delivers 20 Hz position fixes with around 20 millisecond latency with a precision that is only slightly less accurate than Synchronized RTK positioning. Based upon the predictability of the reference station phase data. | ||
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- | == From: " | ||
- | [[http:// | ||
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- | A large part of the solution latency in Synchronized RTK processing isdue to the data formatting and transmission of the base station data tothe rover (seeFigure2.1onpage10). The BD950 receiver includes a Low Latency positioning mode for applications that demandcentimeter-level accuracy almost instantaneously. The Low Latencypositioning mode delivers 20Hz position fixes with around 20mseclatency with a precision that is only slightly less accurate thanSynchronized RTK positioning.The Low Latency positioning scheme relies on the predictability of the base station phase data. Phase measurements observed at a fixedbase receiver generally exhibit a smooth trend. Variations in the carrierphase are caused by: | ||
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- | * Cycle slips | ||
- | * Satellite motion | ||
- | * Receiver and satellite clock variations | ||
- | * Atmospheric delay | ||
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- | Given a brief history of base station phase measurements, | ||
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