hi all,
I tried to get the DNI(direct normal irradiance/insolation), however, from the Tm2 file I can only choose to output direct normal radiation and direct normal illuminance. could anyone tell me how to transform the following data into dni? Btw, whats the unit for the data below? I want to get DNi in W/m2 thanks.
hour DNradiation DN illuminance
| 129 | 910.8 | 19000 |
| 130 | 1656 | 41000 |
| 131 | 2192.4 | 58200 |
| 132 | 2149.2 | 57800 |
| 133 | 2476.8 | 66700 |
| 134 | 2404.8 | 63800 |
| 135 | 1900.8 | 46900 |
| 136 | 1314 | 27800 |
| 137 | 295.2 | 2800 |