Solar Radiation Received by Slopes Using COMS Imagery, a Physically Based Radiation Model, and GLOBE

Table 5

Monthly solar radiation for the original and topographically corrected solar radiation compared with ground measurements for clear and cloudy conditions.

Month	RMSE (% RMSE) original; solar radiation for clear (MJ/m^2)	RMSE (% RMSE) topographical; solar radiation for clear (MJ/m^2)	Month	RMSE (% RMSE) original; solar radiation for cloudy (MJ/m^2)	RMSE (% RMSE) topographical; solar radiation for cloudy (MJ/m^2)
Jun.	0.207 (13.44)	0.761 (49.44)	Jun.	0.399 (47.26)	0.621 (73.56)
Feb.	0.299 (16.54)	0.797 (44.05)	Feb.	0.432 (47.45)	0.635 (69.82)
Mar.	0.215 (10.86)	0.673 (34.03)	Mar.	0.370 (44.83)	0.499 (60.53)
Apr.	0.269 (12.03)	0.576 (25.75)	Apr.	0.392 (42.81)	0.463 (50.62)
May	0.282 (12.45)	0.443 (19.56)	May	0.426 (39.79)	0.471 (44.06)
Jun.	0.332 (17.07)	0.412 (21.15)	Jun.	0.400 (32.90)	0.439 (36.12)
Jul.	0.340 (18.50)	0.491 (26.72)	Jul.	0.441 (40.30)	0.462 (42.24)
Aug.	0.312 (15.36)	0.558 (27.40)	Aug.	0.440 (41.44)	0.479 (45.10)
Sep.	0.276 (14.95)	0.635 (34.40)	Sep.	0.425 (41.95)	0.522 (51.47)
Oct.	0.254 (15.00)	0.713 (42.03)	Oct.	0.392 (40.86)	0.567 (59.16)
Nov.	0.191 (13.19)	0.714 (49.26)	Nov.	0.351 (47.95)	0.517 (70.56)
Dec.	0.178 (12.25)	0.767 (52.84)	Dec.	0.389 (56.45)	0.575 (83.46)