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Carrier Phase and Code Based Absolute Slant Ionosphere Gradient Monitor for GBAS

Belabbas, Boubeker and Meurer, Michael (2012) Carrier Phase and Code Based Absolute Slant Ionosphere Gradient Monitor for GBAS. In: Proceedings of the Institute of Navigation. ION-GNSS 2012, 2012-09-17 - 2012-09-21, Nashville, Tennessee, USA.

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Single frequency Ground Based Augmentation System for a Global Navigation Satellite System (GNSS) like GPS can correct a large amount of errors by applying differential corrections. However effects like ionosphere errors can have a large spatial decorrelation and even after differential correction, large residual ionosphere biases can occur and can drive to an unacceptable large position error of the aircraft during an automatic landing. A network of multiple pairs of single frequency receivers is suggested that detects ionosphere gradients in the range of 300 to 2000 mm/km. These pairs of single frequency receivers is using a double difference carrier phase technique and baselines optimally chosen to allow the highest level of residual carrier phase error. In order to reduce the number of monitors, another variant based on smoothed code based absolute ionosphere gradient monitors is proposed. This type of monitor suggest an upper bound for the range of gradients to be detected. Hence using 3 aligned receivers and combining carrier phase and code based ionosphere gradient monitor, it is possible to detect any gradient above 300 mm/km. The condition for that is to use a very large baseline (2 km) for the code based monitor to detect all gradients above 500 mm/km. The other baseline (221 m) is used by a carrier phase based monitor to detect from 300 to 500 mm/km. If it is possible to reduce the code smoothed double difference residual error, the minimum detectable gradient can even be reduced, making the range to be detected by a carrier based monitor smaller.

Item URL in elib:https://elib.dlr.de/81079/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Carrier Phase and Code Based Absolute Slant Ionosphere Gradient Monitor for GBAS
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Meurer, MichaelUNSPECIFIEDhttps://orcid.org/0000-0001-7465-6705UNSPECIFIED
Date:September 2012
Journal or Publication Title:Proceedings of the Institute of Navigation
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Ionosphere Gradient Monitor, GBAS, Integrity, GNSS, GPS, GAST-D
Event Title:ION-GNSS 2012
Event Location:Nashville, Tennessee, USA
Event Type:international Conference
Event Start Date:17 September 2012
Event End Date:21 September 2012
Organizer:Institute of Navigation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation (old)
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Communication, Navigation and Surveillance (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Belabbas, Boubeker
Deposited On:06 Feb 2013 10:16
Last Modified:24 Apr 2024 19:47

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