Dear Hitesh,

MOD16A2 gives you the 8-day composite. The period of coverage is 8 days with the exception of the last period at the end of the year which is either 5 or 6 days. For eg: ET/PET units are 0.1mm/5-day for December 27-31 of non-leap years, and 0.1mm/6-day for December 26-31 of leap years. So what you can do is convert your reference data or data of interest to the 8 day period and then you can compare or use it accordingly.

Also for more detailed information, I suggest you go through following useful articles on MOD16A2 evaluation and preprocessing:

Article Evaluation of Variable-Infiltration Capacity Model and MODIS...

Article Modelling the dynamics of evapotranspiration using Variable ...

I hope it helps you.

Cheers

Ankur

Dear Hitesh Bugata

I suggest the methodology I used in the following work: Conference Paper Estimation of irrigation water requirements at irrigation di...

Regards,

Giuseppe

Respected Ankur Srivastava , summing up other variables' data of 8 days to make it same as Evapotranspiration is a brilliant idea. I regret not thinking of it before. This works for precipitation, but about soil moisture? I can't add soil moisture for 8 days which gives vague results such as its value can be more than 100%. How to consider soil moisture for 8 days if we have daily data of it with respect to the evapotranspiration data?

Respected HAMIMED Abderrahmane

Hello,

I have got a question on MOD16A2,

The methodology document says we have to multiply MOD16 by 0.1.

After downloading .hdf files I found the Fill values were already multiplied by 0.1. For example instead of # 32765 = land cover assigned as barren,sparse veg (rock,tundra,desert), my values are 3276.5

Should I multiply by 0.1 again? the values become small then.