Dear Authors,

You have received three reviews which were all positive about the potnetial of publishing this manuscript in HESS. However, they also indicated several shortcomings which you have to take into account. Since the majority of these comments deals with better phrasing or explaining what has been done, I have checked the box "Publish subject to revisions" meaning that I will send the revised version back to some of the referees.

On top of the comments made by the referees, I also have a suggestion in combination with Fig. 7 which shows the synthetic and a field acquired hemispherical photograph. Since this figure shows qualitatively the sensitivity to small errors in the exact location, it would be beneficial to show the daily timeserie of the pyranometer (as in Fig. 4) with the simulated timeseries of a couple of points surrounding the pyranometer. This may show that points located 1 or 2 meters away from the pyranometer give simulated solar radiation similar to the observed one.
In stream temperature models it often does not matter that much if the exact location of solar insolation is shifted a few meters.

Having said this, I was also wondering if you have taken into account that the pyranometer was located 1 m above the surface. Especially if solar angels are low, this may influence your result.

With kind regards,

Martijn Westhoff

Dear authors,

You have addressed all comments sufficiently. I am therefore happy to inform you that the manuscript is accepted for publication in HESS.

With kind regards,

Martijn Westhoff