Ground-based Augmentation System Of Generalized Integrity Of Security System Design Studies

The integrity aims at reflecting to what extent the user trusts the information provided by the GNSS when using it to position. A system is available during its starting operation period and can meet all the quotas of its different functions. However, a system should automatically check and find out the malfunction once its precision in global positioning declines due to the emergence of some unpredictable events, and at the same time warn the user of that. Particularly when the GNSS is used in some vital occasions such as in the field of aviation and arms system, the integrity is more than a decisive quota. The integrity testing of GPSS has become a priority, and the quotas will last during the whole lifespan of the GNSS. In addition, there is practical evidence that very close relation exists between the reliability of the system and its integrity testing.This research paper has defined the wide security system in the GBAS and expanded the content of integrity testing and updated some calculation methods in some numerical values, based on the deep research on integrity quotas at home and abroad as well as some relative theories, combining the problems in the practical system. The definition of the wide security system in the integrity of the GBAS shares some common aspects with that of the American WAAS. The solution model and simulation precision are very similar to that of WAAS, and some quotas are above the WAAS system. The dividing of testing system is more complete detailed and scientific.This research paper has made clear the definition of the wide security system of the GBAS. The integrity not only indicates the capacity to warn its user in time when the system or the positioning data can not be applied to the positioning service, it should also be relevant to the entire construction of the GNASS. All the different dealing phases in the system should be contained in the wide integrity security system.The practical experience has proved that different dealing factor can to some degree affect the reliability of the integrity. The wide integrity security system is to take the datum station and the central station into consideration when designing the integrity testing factors based on the previous ones.