小泉測機製作所 Company Profile

We installed a GNSS reference station at our company building and determined the coordinates of the reference station according to the "Manual for Reference Point Surveying Using Only Electronic Reference Points" (hereinafter referred to as the Manual). The configuration and surveying procedures of the reference station are explained on our company blog.

We conducted an RTK accuracy verification of the GNSS reference station (Hi-Target Vnet6plus receiver + choke ring antenna) installed at our company building. Generally, with a single-frequency GNSS, once the baseline length exceeds 10 km, it becomes impossible to consider the path through the ionosphere as the same, and the difference in ionospheric delay becomes a significant source of error. By using dual-frequency GNSS, it is possible to correct the delay based on the differences in delay caused by the frequency of the radio waves; however, it is still said to be effective only up to about 10 km. Why is that? We have published the verification results on our blog.

We received an inquiry about whether it is possible to establish a reference point in Africa and the Middle East. The condition is to conduct the survey with only one GNSS receiver, but there is no network RTK service available on-site. Can we obtain accurate coordinates using just one receiver with the Australian government's service "AUSPOS"? We have published the verification results on our company blog.