Journal of the Institute of Positioning, Navigation and Timing of Japan
Online ISSN : 2185-2952
ISSN-L : 2185-2952
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  • Yoshiyuki YAMAMOTO
    2023 Volume 14 Issue 3 Pages 15-25
    Published: 2023
    Released on J-STAGE: May 25, 2023
    JOURNAL FREE ACCESS

    In recent years, the use of video has been spreading in not only the entertainment field but also disaster prevention and infrastructure maintenance and management combined with artificial intelligence. On the other hand, even if a general camera has a GNSS receiver/antenna, most of them are single-frequency. Therefore the accuracy needs to be improved to identify the filming location and use it for maintenance and management. So this study shows a method of correcting the time of video captured by a general camera by using the reciprocating motion of a low-cost, small GNSS receiver/antenna with dual frequencies and using the peaks in the video and the waveform created from GNSS as a mark of correction. The experiments showed that the time correction error was 0.049 s due to applying the regression analysis results of waveforms obtained by reciprocating motion on a horizontal rail at the beginning and end of observation and photography for about one hour, which was similar to previous research. In addition, the results showed that it is possible to secure the positional accuracy required in the outline design of 1/1000 topographic maps and 1/2500 topographic maps in driving (40km/h and 60km/h) on local roads.

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