 |
| How many degrees above the horizon is that tree top? |
 |
| A home-built plywood sextant to measure vertical angles. |
 |
| Survey field notes |
 |
| Field notes recorded in a spreadsheet and converted to true azimuth angles. |
 |
| Field notes plotted on site plan |
 |
| Some notes about height angles and solar paths |
 |
| A rough plot of tree heights and solar paths for spring, summer, fall, and winter. Conclusion: in winter the back-up generator will get its excercise. |
 |
| View to southeast from intended solar collector installation. |
