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local time computation



Hello Ferret Users,

I have satellite observations for each month seperately in netcdf format for the year 2003 which looks like :-

name title I J K L
YEAR Year ... ... ... 1:119641
MONTH Month ... ... ... 1:119641
DAY Day ... ... ... 1:119641
HOUR Hour ... ... ... 1:119641
MINUTE Minute... ... ... 1:119641
LON Lon ... ... ... 1:119641
LAT Lat ... ... ... 1:119641
CO2 CO2 ... ... ... 1:119641


Here L is running index.

All above time variables are universal time.

Now My question is :-

Can we separate here CO2 variable as day observations (6:18 hrs) and night observations (18:6 hrs) by using any 'if' condition in ferret commands.

Many thanks in advance for your help,

Regards,
Yogesh


--

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Yogesh Tiwari,
Max-Planck Institute for Biogeochemistry,
Hans-Knoell Strasse 10,
D-07745 Jena,
Germany

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e-mail : yogesh.tiwari@bgc-jena.mpg.de
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