Shimosato Hydrographic Observatory

Shimosato Hydrographic Observatory is a Japan Coast Guard observing facility at Shimosato in Wakayama. Its satellite laser ranging system is listed by ILRS as SISL, station 7838, with DOMES reference 21726S001. The station profile places the site on elevated ground near the sea and publishes its geodetic reference coordinates. This record uses that station position and treats the observatory as one physical facility. Sources: [ILRS station profile](https://ilrs.gsfc.nasa.gov/network/stations/active/SISL_station_info.html); [ILRS operational station inventory](https://ilrs.gsfc.nasa.gov/network/stations/active/index.html). Sources checked 17 October 2026.