Institute of Pharmacology and Toxicology Accademy of Military Medical Sciences P.l.a. China

Hongxia Wang

Lili Wang

Song Li

Junhai Xiao

Zhipeng Wang

Yanbo Zhu

Hongying Liu

Kun Fang

Liuhong Yun

Beifen Shen

Jingtian Du

Zihe Rao

Aihua Nie

Wuhong Pei

Songcheng Yang

Cuiling Shu

An ARAIM availability prediction method under a complex terrain environment is provided. The method includes: 1) selecting positioning points according to an air line; 2) calculating terrain shielding angles; 3) predicting visible satellites; 4) determining a fault mode that needs to be monitored; 5) calculating a positioning error variance, an influence coefficient of a nominal deviation, and a variance of a solution separation test statistic; and 6) calculating a threshold of a solution separation test, calculating a protection level, and determining availability. According to the method, the terrain shielding angles are calculated based on terrain model data, and the visible satellites are predicted based on ephemeris data or almanac data to further calculate a protection level, while determining the availability; and the accuracy of availability prediction can, by considering the effect of terrain barriers on the prediction of the visible satellites, be improved to ensure the safety of aircrafts.

ARAIM availability prediction method under complex terrain environment

This invention relates to substituted 6-membered N-Herterocyclic neurotrophic compounds of formula (I) or pharmaceutically acceptable salts or hydrates thereof, wherein R, R, X, Y, and Z are as defined in the description; their preparation methods, compositions comprising the same, and their use as inhibitors of FK560 binding proteases activity for treating and preventing neurodegenerative diseases and other nerve disorders associated with nerve injuries or other related diseases 

Substituted 6-membered N-heterocyclic compounds and method for their use as neurological regulator

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Beijing, China

Hongxia Wang