Speaking in terms of quality it is not sufficient to measure as precisely as possible. You also have to demonstrate that the equipment used is traceable down to well-known and accepted standards. How can that be achieved in terms of global satellite positioning?
Well, I used my measurement equipment in connection with my personal continously operated reference station and the GNSS test point located at Zaberfeld Stausee Ehmetsklinge, with a distance of 8.868,88 meters from my garage. The position of this reference point was certified by Vermessungsamt Heilbronn.
Here are the results of my measurements:
| Zaberfeld (ETRS89/WGS84) |
North Latitude | Eastern length | Ellipsoid height |
| Certified Value | 49,058346944° | 8,9124975° | 292,21 m |
| Measurement | 49,05835702° | 8,91251317° | 291,539 m |
| Difference | 0,000021% | -0,00017% | -0,23% |
