Compare the performance of 4dvar using HTLM with 3dfgat and 4denvar

[kbhargava]

Description

• Run 3d and 4d hybrid methods DA experiments for a month
• Compare the scienctific and computaional performance of these with the 4dvar experiemnt with ensemble HTLM and climatology HTLM
• Make a final report based on these results
• a paper, may be??