Kniha Development and Simulation of a Pseudolite-Based Flight Reference System Terry J Bouska

Development and Simulation of a Pseudolite-Based Flight Reference System

Jazyk: Angličtina
Väzba: Brožovaná
Vydavateľ: Biblioscholar
Dostupnosť: Skladom u dodávateľa
Odosielame za 9-15 dní
16.93
Current flight reference systems are vulnerable to GPS jamming and also lack the accuracy required t...

Informácie o knihe

Jazyk
Angličtina
Väzba
Kniha - Brožovaná
Vydalo
2012
Stránok
144
EAN
9781249600329
ISBN
9781249600329
Enbook ID
08142810
Vydavateľ
Hmotnosť
268
Rozmery
189 x 246 x 8

Kompletný popis

Current flight reference systems are vulnerable to GPS jamming and also lack the accuracy required to test new systems. Pseudolites can augment flight reference systems by improving accuracy, especially in the presence of GPS jamming. This thesis evaluates a pseudolite-based flight reference system which applies and adapts carrier-phase differential GPS techniques. The algorithm developed in this thesis utilizes an extended Kalman filter along with carrier-phase ambiguity resolution techniques.A simulation of the pseudolite-based positioning system realistically models measurement noise, multipath, pseudolite position errors, and tropospheric delay. A comparative evaluation of the algorithms performance for single and widelane frequency measurements is conducted in addition to a sensitivity analysis for each measurement error source, in order to determine design tradeoffs. Other analyses included the use of optimal smoothing, non-linear filtering techniques, and code averaging. Specific emphasis is given to two alternate methods, both developed in this research, for handling the residual tropospheric error after applying a standard tropospheric model.Results indicate that the algorithm is capable of accurately resolving the pseudolite carrier-phase ambiguities, and providing a highly accurate (centimeter-level) navigation solution. The filter enhancements, particularly the optimal smoother and tropospheric error reduction methods, improved filter performance significantly.

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