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On INS/GNSS-based Time Synchronization in Photogrammetric and Remote Sensing Multi-Sensor Systems Über INS/GNSS-basierte Synchronisation von Multisensor-Systemen in der Photogrammetrie und Fernerkundung

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Abstract:

We propose a method to estimate time calibration parameters in the frame of a space-time integrated sensor orientation concept for the purpose of correct instrumental synchronization or synchronization verification in multi-sensor photogrammetric and remote sensing systems. The new method is based on the use of the INS/GNSS-derived velocities in addition to the commonly used INS/GNSS-derived positions and attitudes for aerial control. We present the corresponding mathematical models for local geodetic and global map-projected coordinate systems, discuss the separability between spatial and temporal calibration parameters, deduce various appropriate block configurations, and assess their behaviour with actual data. The results show that, for a number of block configurations, it is possible to correctly estimate synchronization calibration parameters with a precision of few tenths of a millisecond.

German
Im Beitrag wird eine Methode zur Schätzung von zeitlichen Kalibrierparametern vorgestellt, die bei Verfahren zur gemeinsamen räumlichen und zeitlichen Sensororientierung von Multisensor-Systemen eine Rolle spielen, und die entweder der richtigen Gerätesynchronisation oder deren Verifikation dienen. Der neue Ansatz berücksichtigt auch die aus den INS/GNSS-Beobachtungen abgeleitete Geschwindigkeit und nicht nur die bislang meist verwendeten Positionen und Neigungen. Der Beitrag entwickelt die mathematischen Modelle für lokale dreidimensionale kartesische und für globale projizierte Koordinatenreferenzsysteme, befasst sich mit der Trennbarkeit von räumlichen und zeitlichen Parametern, leitet daraus eine Reihe geeigneter Blockgeometrien ab und zeigt deren Verhalten mit realen Daten. Die Ergebnisse belegen, dass es bei bestimmten Blockgeometrien möglich ist, die zeitlichen Kalibrierparameter mit einer Genauigkeit von fast einer Zehntel Millisekunde zu schätzen.

Keywords: INS/GNSS; MULTI-SENSOR SYSTEMS; ORIENTATION; SELF-CALIBRATION; SYNCHRONIZATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/1432-8364/2012/0104

Publication date: May 1, 2012

More about this publication?
  • Photogrammetrie - Fernerkundung - Geoinformation (PFG) is an international scholarly journal covering the progress and application of photogrammetric methods, remote sensing technology and the intricately connected field of geoinformation processing.

    Papers published in PFG highlight new developments and applications of these technologies in practice. The journal hence addresses both researchers and student of these disciplines at academic institutions and universities and the downstream users in both the private sector and public administration.

    PFG places special editorial emphasis on the communication of new methodologies in data acquisition, new approaches to optimized processing and interpretation of all types of data which were acquired by photogrammetric methods, remote sensing, image processing and the computer-aided interpretation of such data in general.

    PFG is the official journal of the German Society of Photogrammetry and Remote Sensing.
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