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can i combinate two parameters with different Temporal Granularity , i mean can i combinate image LST MODIS 8 days with image NDVI modis 16 days??

closed as unclear what you're asking by PolyGeo, Devdatta Tengshe, Jason Scheirer, BradHards, Fezter Mar 24 '14 at 6:49

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    Please edit your Question title to make it mixed case because all uppercase makes it seem like you are shouting. While you are doing that I recommend that you revise your Question with more detail and attention to your tags because I think you would want a modis tag but there is no other indication that you might be using ArcGIS for Desktop than the arcgis-10.2 tag. – PolyGeo Mar 24 '14 at 5:18
  • thanks for answers , i'm just new here so sorry for not askng wth the appropriate way , my question was about combining two modis LST image 8 days to have one LST image 16 days , because my work is to combinate taht image of LST image 16 days with another image 16 days NDVI MODIS mean to combinate two parameters with the sameTemporal Granularity of 16 days – user28390 Mar 25 '14 at 0:27
  • No problem but for framing future questions this help page may be useful. – PolyGeo Mar 25 '14 at 0:33
  • ok Sir PolyGeo. – user28390 Mar 25 '14 at 0:36
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    For this Question to be re-opened I suspect that you will need to perform a much larger edit to revise it so that what you are asking is much clearer to potential answerers and future readers. – PolyGeo Mar 25 '14 at 1:44
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You cannot do this in any reliable fashion. The reason is that every MODIS product (like LST) is created from a number of observations (basically, the MOD01 radiance product) and you do not know how that is done. The MOD11A2/MYD11A2 products do not give you the number of observations that go into each product, nor the extremes.

But if you really want to do it, it is very simply done by adding up the two images and dividing by 2 to get you the average temperature over the 16 days. Not a very solid plan though. At the very least you should check the QC_day/QC_night flags and only produce the average temperature for those pixels where the lower two bits in QC_day/QC_night are 00 or 01 in both source products.

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