29-06-2017 дата публикации
Номер: US20170184723A1
Принадлежит:
Disclosed is a system for determining a protection level. The system includes a receiver configured to receive an error augmentation for a satellite orbit and clock error, an error augmentation for an ionospheric error, an error augmentation for noise and multi-path between a receiver and a satellite, and an error augmentation for a tropospheric error, a first calculator configured to calculate a first adjustment coefficient to be applied to the error augmentation for the satellite orbit and clock error and the error augmentation for the ionospheric error, and a second calculator configured to calculate a protection level by applying the first adjustment coefficient. 1. A system for determining a protection level , the system comprising:a receiver configured to receive an error augmentation for a satellite orbit and clock error, an error augmentation for an ionospheric error, an error augmentation for noise and multi-path between a receiver and a satellite, and an error augmentation for a tropospheric error;a first calculator configured to calculate a first adjustment coefficient to be applied to the error augmentation for the satellite orbit and clock error and the error augmentation for the ionospheric error; anda second calculator configured to apply the first adjustment coefficient to the error augmentation for the satellite orbit and clock error and the error augmentation for the ionospheric error and calculate a protection level using the error augmentation for the noise and multi-path between the receiver and the satellite and the error augmentation for the tropospheric error.2. The system of claim 1 , wherein the first adjustment coefficient is a value for normalizing a vertical position error with a standard deviation used for a vertical protection level and letting a normalized probability distribution be a standard normal distribution.3. The system of claim 1 , wherein the second calculator applies claim 1 , to the calculated protection level claim 1 , a ...
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