Description
The Goecke Leica GPH1-compatible round prism is a survey prism made by Goecke (part number 46-63-3022 (no target), 46-63-3023 (with target); 46-63-3024 GPR1-compatible prism without tilt holder).
Its absolute prism constant is -34.4 mm, which is 0.0 mm on the Leica scale.
Specifications
| Model: | 46-63-3022 / 46-63-3023 |
| Manufacturer: | Goecke |
| MPN: | 46-63-3022 (no target), 46-63-3023 (with target); 46-63-3024 GPR1-compatible prism without tilt holder |
| Status: | Current |
| Height Offset: | 86.0 mm |
| Absolute constant: | -34.40 mm |
| Leica constant: | +0.00 mm |
| Constant source: | Manufacturer documentation |
| Prism diameter: | 62.5 mm |
| Centring accuracy: | ±2.0 mm |
| Range: | about 3,000 (unit not stated) |
| Mount: | Leica plug connector |
| Coating: | Copper-coated back |
| Housing: | Unbreakable plastic; optional aluminium target 180x165 mm |
| Equivalents: | Leica GPH1 / GPR1 |
| Last verified: | 21/10/2026 |
Sources
Goecke Leica GPH1-compatible round prism FAQ
Below is a list of frequently asked questions about Goecke Leica GPH1-compatible round prism.
What is the prism constant for the Goecke Leica GPH1-compatible round prism?
The absolute prism constant for the Goecke Leica GPH1-compatible round prism is -34.4mm. The Leica constant is 0.0mm.
Can I use the Goecke Leica GPH1-compatible round prism with a Leica instrument?
Yes, just set the prism constant to 0.0mm.
What is the height offset of the Goecke Leica GPH1-compatible round prism?
The height offset is 86.0mm.
