3DVar configuration of time_window

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Polly_LO
Posts: 3
Joined: Mon Mar 18, 2019 9:40 am

3DVar configuration of time_window

Post by Polly_LO » Mon Mar 18, 2019 9:43 am

Good day!

I have succesfully run 3Dvar with radar tested data case.

Namelist.input for test case:
&wrfvar18
analysis_date="2006-07-11_12:00:00.0000",
&wrfvar21
time_window_min="2006-07-11_09:00:00.0000",
&wrfvar22
time_window_max="2006-07-11_15:00:00.0000",

All data in ob.radar were on 2006-07-11_12:00:00.

I want to run case with my own radar data.
I have successfully prepared the ob.radar file (2019-03-14 12:00Z) and generated be.dat for my running.
I want to assimilate these data to (2019-03-14 00:00) forecast and create wrfinput and wrfbdy on 2019-03-14 00:00.
My configuration of namelist.input
wrfvar18
analysis_date="2019-03-14_00:00:00.0000",
&wrfvar21
time_window_min="2019-03-14_09:00:00.0000",
&wrfvar22
time_window_max="2019-03-14_15:00:00.0000",

I run 3dvar successfully and update boundary condition.
But when I checked the wrfvar_output and wrfbdy data was updated on Time 2019-03-14_00:00:00

How to configure namelist.input correctly (analysis_date, time_window)? How to correctly run assimilation of data on (2019-03-14 12:00Z) or (2019-03-14 09:30Z) ?

With best regards

JakeLiu
Posts: 14
Joined: Fri Jun 08, 2018 8:29 am

Re: 3DVar configuration of time_window

Post by JakeLiu » Sun Mar 31, 2019 9:21 pm

analysis_date needs to be between time_window_min and time_window_max.

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