A fast and efficient integrity computation for non-precision approach performance assessment |
| |
| Authors: | Carl D Milner Washington Yotto Ochieng |
| |
| Institution: | (1) Department of Civil and Environmental Engineering, Centre for Transport Studies, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK |
| |
| Abstract: | The level of safety to be expected from global positioning system (GPS) must be known in order to use it to support safety
critical operations such as air navigation. This is captured by the navigation performance parameter of integrity which includes
the ability of the navigation system to deliver a warning to the user in the event of a significant failure and within a specified
time-to-alert. Given the high percentile requirement associated with integrity, assessment of expected system performance
both in the nominal case and during failure events, requires the application of analytical techniques. This paper identifies
the weaknesses of the current methods for assessing the level of performance to be expected of GPS for non-precision approaches
and proposes ways to address them including a novel application of a mathematical integration technique that greatly reduces
the computational load associated with integrity performance calculations. Results based on computation times show that the
new method reduces computational load by a factor of 500+ with a high accuracy and associated high level of confidence. It
is shown that in some cases, the technique presented is able to improve GPS RAIM availability beyond the gains achieved by
measurement weighting. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
