Geoscientific Instrumentation, Methods and Data Systems
Geoscientific Instrumentation, Methods and Data Systems
GI
Articles | Volume 15, issue 1
Articles | Volume 15, issue 1
https://doi.org/10.5194/gi-15-7-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/gi-15-7-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 1
Research article
 | 
06 Jan 2026
Research article |  | 06 Jan 2026

The azimuth observation by Global Navigation Satellite Systems as an alternative to astronomical method: a case study at Kakioka

Hiroki Matsushita, Daisuke Matsuura, Funa Iizuka, Junpei Oogi, and Seiki Asari

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Short summary
We have adopted Polaris sighting as our azimuth observation at our observatories for a long time. This method, however, has some difficulties such as weather-dependent observation conditions. Therefore, we examined the satellite method and found that its precision was comparable to the Polaris sighting. We also found that a significant difference of about 10 arcseconds between them. This is due likely to a deflection of vertical, which is well known in the field of geodetic surveying.
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Geomagnetic observatories, their data, and the application...