XVIIIth Congress: XVIIIth Congress

kraus, karl; waldhäusl, peter

Bibliographic data

Multivolume work

Persistent identifier:: 1667435949

Title:: XVIIIth Congress

Sub title:: Vienna, Austria 1996

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1667435949

Language:: English

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1667437070

Title:: XVIIIth Congress

Scope:: 230 Seiten

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1667437070

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(31,B1)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist anhand des Copyrightjahrs ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: A Long-Range Dynamic GPS Processing System for Aircraft Navigation and Positioning Yanming Feng & Kurt Kubik, [...] Shaowei Han, [...]

Document type:: Multivolume work

Structure type:: Chapter

R., 1992. tion Using hives of iton, D.C., /stem with University Canada. ation and d Remote .M., 1990. sion. SPIE ; Machine -valuation M-ASPRS , pp. 109- ision of a rammetry art B1, pp. meing, H. Precision Josium on )josium on surement, A Long-Range Dynamic GPS Processing System for Aircraft Navigation and Positioning Yanming Feng & Kurt Kubik, Queensland University of Technology, Australia Shaowei Han, The University of New South Wales, Sydney, Australia WG 1/2 - System Aspects of Platform Guidance, Navigation and Sensor Positioning KEY WORDS: GPS, real time dynamic positioning, Kalman filtering and smoothing, aircraft navigation and positioning. ABSTRACT On-The-Fly integer ambiguity resolution for long-range dynamic or kinematic GPS positioning is difficult to achieve. As a result, although quite a large number of originations have established their own versions of On-The-Fly software which has been very promising for short-range positioning, none has been successfully developed for long range dynamic GPS navigation and positioning. The paper documents a dynamic GPS processing prototype system that achieves decimetre-level accuracy in real time and 1ppm accuracy off-line (by postprocessing) in three dimensions over the range of a few hundred kilometres without OTF ambiguity resolutions. The prototype system was based on two important strategies. Firstly, it detects and removes any carrier phase cycle slips between two epochs in which there may be a data gap of a few seconds to a few minutes, depending on the user’s receivers and user‘s environments. Secondly, phase delta-positions and DGPS code positions are obtained without the needs of resolving ambiguities, which are then reprocessed in real time by Kalman filtering approaches to achieving decimetre accuracy, and off line by Kalman smoothing techniques for achieving 1ppm accuracy in three dimensions. This paper describes the theoretical basis of the developed long range dynamic GPS positioning system and gives experimental results for aircraft and navigation positioning, which confirm the achievable cycle- slip detectability and positioning capability. searching of ambiguity resolutions on the fly over lang ranges more difficult and even impossible. Thus, centimetre accuracy is difficult to achieve for long range applications. 1. INTRODUCTION Much research has been done into fast and efficient ways to resolve carrier phase ambiguities, in order to enable GPS However, for aircraft guidance, navigation and sensor users to realise the maximum potential accuracy of GPS positioning for photogrammetry, real time decimetre carrier phase measurements. As a result, many accuracy and lppm accuracy off line in three dimensions organisations have developed their own versions of Over the range from a few tens to hundreds kilometres may kinematic GPS positioning software (Deloach et al, 1995), be quite acceptable. This may be achieved in theory without the majority of which is based on the so-called On-The-Fly On The Fly ambiguity resolutions (Feng, 1995; Cannon, (OTF) ambiguity resolution technique. OTF techniques 1995). On the other hand, the use of dual frequency carrier promise real - time centimetre positioning in three phase observable also makes it possible to detect and repair dimensions. However, almost all the existing systems were cycle slips depending on carrier phase measurements designed for short-range kinematic (or dynamic) positioning (Hofmann 1992; Han, 1995) rather than On-The-Fly environments, and none has so far been successfully techniques, which allow integer ambiguities to be resolved developed for long-range dynamic applications. There are again for kinematic process over short-ranges when a cycle two major reasons for this. The first reason is that for long- slip occurs. Our strategy for long-range kinematic or range dynamic or kinematic positioning, the integer dynamic positioning is therefore to remove cycle slips and ambiguity resolution is difficult to achieve from both realise decimetre accuracy in real time not depending on ionosphere-free and ionosphere biased carrier phase ^ OTF ambiguity resolutions. measurements. The ionosphere-free combination of L1 and L2 carrier phase measurements has the wavelength of a few The development of a long range dynamic (LRD) GPS millimetres; any other combinations of L1 and L2 suffer positioning system aims to provide a prototype system from the ionospheric effects. Thus integer ambiguities can capable of decimetre positioning in real time and lppm generally not be estimated in real time by the state-of the-art . — accuracy by postprocessing. This paper addresses the OTF techniques. The second reason is that the orbital errors theoretical basis for the LRD system and experimental and un-modelled troposphere effects on double difference results. Firstly, a method for cycle-slip detection and cycle- carrier phase measurements increase as the distance slip repair after data gaps are proposed, based on L1/L2 and between base and rover receivers increases (Chen, 1994). P-code measurements. This is followed by a method which These errors make integer removal of cycle-slips or integer jointly uses the code and phase measurements to create delta-positions and position sequences. These results are 65 International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996

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