The authors present a study on the effects of revisit interval and temporal upscaling method on remotely-sensed ET estimates. They investigate 5 upscaling methods and compare the results to field observations from the Ameriflux data set.

Both reviewers acknowledge the usefulness of the study, but are missing the physical interpretation rather than only focussing on the statistical analysis. I think the paper will benefit from an attempt to also find physical meaning/understanding. Furthermore, I agree with reviewer #1 that for Figure 2, it is more interesting to show the actual LE value instead of the mean LE even if the data is then more scattered. Because, what is the meaning of mean LE?

Specific comments:
-Table 1: a bit redundant table. Better to explain this in the text.
- P6L13-14: skip "(these are indicated....respectively)", since you are not using these abbreviations.
- P7L7: what is meant by 'first n-h' and 'final n-h'? Please explain.
- P7L12: x in italic
- P8L22: I would replace open canopy for open (also in figures)
- Fig 1: add on y-axis the autocorrelation function, since that is the correct label instead of f_{i}
- Fig 3-6: add on y-axis RMSE or MAE, since that is the correct lable instead of f_{i}

Please have a look at my previous comments. I don't think these are addressed yet.

"The authors present a study on the effects of revisit interval and temporal upscaling method on remotely-sensed ET estimates. They investigate 5 upscaling methods and compare the results to field observations from the Ameriflux data set.

Both reviewers acknowledge the usefulness of the study, but are missing the physical interpretation rather than only focussing on the statistical analysis. I think the paper will benefit from an attempt to also find physical meaning/understanding. Furthermore, I agree with reviewer #1 that for Figure 2, it is more interesting to show the actual LE value instead of the mean LE even if the data is then more scattered. Because, what is the meaning of mean LE?

Specific comments:
-Table 1: a bit redundant table. Better to explain this in the text.
- P6L13-14: skip "(these are indicated....respectively)", since you are not using these abbreviations.
- P7L7: what is meant by 'first n-h' and 'final n-h'? Please explain.
- P7L12: x in italic
- P8L22: I would replace open canopy for open (also in figures)
- Fig 1: add on y-axis the autocorrelation function, since that is the correct label instead of f_{i}
- Fig 3-6: add on y-axis RMSE or MAE, since that is the correct lable instead of f_{i}"