Heliotrope used for directing sun’s rays to distant observer. Used to illuminate station site so far distant observer could measure angles
Photo Category: Geodesy - Instruments
| 640 x 420 | 55.08 KB | |
| 1280 x 839 | 209.03 KB | |
| 1832 x 1200 | 478.71 KB |
| Added On | 19th October 2015 |
| Viewed | 25 viewed |
| Downloads | 2 Downloaded |