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High Integrity Carrier Phase Based Relative Positioning for Precision Landing using a Robust Nonlinear Filter

Rippl, Markus and Schlötzer, Susanne and Henkel, Patrick (2010) High Integrity Carrier Phase Based Relative Positioning for Precision Landing using a Robust Nonlinear Filter. In: Proceedings of the ITM 2010. International Technical Meeting (ITM) of the Institute of Navigation (ION) 2010, 2010-01-25 - 2010-01-27, San Diego, U.S.A..

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In this paper, a cascaded ambiguity resolution scheme is integrated into an extended Kalman filter for reliable carrier phase positioning. The state vector includes the user position and velocity, carrier phase ambiguities and ionospheric and tropospheric delays which are determined from satellitesatellite double differenced dual frequency code and carrier phase measurements. The integrity of the state estimation is continuously validated by Autonomous Filter-based Fault Detection, Identification and Model Adaptation (AFDIA). Cascaded ambiguity resolution is applied to fix the widelane ambiguities and then the measurement ambiguities. In this paper, the integer ambiguity resolution is done sequentially with integer decorrelation. This bootstrapping enables a success rate which can be determined analytically. A partial integer decorrelation is used to achieve an optimum trade-off between variance reduction and bias amplification. The AFDIA checks the consistency of the ambiguity resolution and navigation solution at each time step. The algorithm supplies the user also with an error overbound called the Vertical and Horizontal Protection Levels (VPL and HPL). The fixing of the measurement integer ambiguities results in a substantial reduction of the protection levels. Protection levels of less than 50 cm have been observed for simulated dual frequency E1 and E5a Galileo measurements and realistic flight paths.

Item URL in elib:https://elib.dlr.de/63085/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:High Integrity Carrier Phase Based Relative Positioning for Precision Landing using a Robust Nonlinear Filter
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:January 2010
Journal or Publication Title:Proceedings of the ITM 2010
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:GNSS, Galileo, Aviation, Precision Approach, Kalman filter, EKF, Carrier Phase, Relative Positioning, AFDIA, RAIM, CAR
Event Title:International Technical Meeting (ITM) of the Institute of Navigation (ION) 2010
Event Location:San Diego, U.S.A.
Event Type:international Conference
Event Start Date:25 January 2010
Event End Date:27 January 2010
Organizer:Institute of Navigation (ION)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Rippl, Markus
Deposited On:01 Mar 2010 08:11
Last Modified:24 Apr 2024 19:28

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