daily aggregation vs C6?
I believe this is the current logic we use for daily aggregation in Yori:
180W to 90W: use 3z on target day to 3z on next day
90W to 0W: use 21z on previous day to 21z on target day
0E to 90E: use 3z on target day to 3z on next day
90E to 180E: use 21z on previous day to 21z on target day
on the PLAT-33 Jira ticket, Paul Hubanks was saying this is the logic they use for C6.
For Aqua
Longitude Zone [-180 to -90]
Aqua Late Day Only: 24 hours starting at 03:00 GMT
Longitude Zone [-90 to -0]
Aqua Standard Day: 24 hours starting at 00:00 GMT
Longitude Zone [0 to 90]
Aqua Late Day Only: 24 hours starting at 03:00 GMT
Longitude Zone [90 to 180]
Aqua Standard Day: 24 hours starting at 00:00 GMT
For Terra
Longitude Zone [-180 to -90]
Terra Standard Day: 24 hours starting at 00:00 GMT
Longitude Zone [-90 to -0]
Terra Early Day Only: 24 hours ending at 21:00 GMT
Longitude Zone [0 to 90]
Terra Standard Day: 24 hours starting at 00:00 GMT
Longitude Zone [90 to 180]
Terra Early Day Only: 24 hours ending at 21:00 GMT
So Aqua they use the same zones as we do for 1 & 3 and for Terra they use the same zones we do for 2 & 4. The question we have is does our aggregation produce a similar result? In other words does using all 4 zones for both satellites cause differences in the product. I know there will be differences on granules near the poles but for granules near the equator I suspect not.
What I would suggest that you do is make a test branch of yori with 2 new command lines arguments, something like aqua_daily and terra_daily where it uses the logic above. Then create a L3 product for both Aqua and Terra using both our daily aggregation and then the corresponding new aqua_daily and terra_daily. You should be able to validate the result by gridding up observation time and then comparing the two datasets.
Paolo, Do you have the free cycles to look into this?