Use of X-band Weather Radar: 8272532-2.pdf

ABSTRACT

To enable safe use of Synthetic Vision Systems (SVS) at lower altitudes, real-time sensor measurements
are required to ensure the integrity of terrain and obstacle models stored in the onboard SVS and to detect
hazards that may have been omitted from the stored models.  This paper discusses various aspects of using
X-band weather radar for terrain database integrity monitoring and terrain referenced navigation. Feature
extraction methods will be addressed to support the correlation process between the weather radar
measurements and the stored terrain databases. Furthermore, improved weather radar antenna models will
be discussed to more reliably perform the shadow detection and extraction (SHADE) functionality. In
support of the navigation function, methods will be introduced to estimate aircraft state information, such
as velocity, from the geometrical changes in the observed terrain imagery. The outputs of these methods
will be compared to the state estimates derived from Global Positioning System (GPS) and Inertial
Navigation System (INS) measurements. All methods discussed in this paper will be evaluated using flight
test data collected with a Gulfstream V in Reno, NV.

Keywords:   X-band weather radar, terrain database, integrity monitor, navigation

[ 本帖最后由 wangjie 于 2008-12-28 10:24 编辑 ]

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