# Surface obs assimilation case

**URL:** <https://forums.jcsda.org/t/surface-obs-assimilation-case/542>\
**Category:** JEDI\
**Created:** [November 1, 2023, 10:06pm UTC](https://forums.jcsda.org/t/surface-obs-assimilation-case/542 "2023-11-01T22:06:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![HuiLiu-NOAA](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.jcsda.org/huiliu-noaa/32/194_2.png) [@HuiLiu-NOAA](https://forums.jcsda.org/u/HuiLiu-NOAA)\
**Post date:** [November 1, 2023, 10:06pm UTC](https://forums.jcsda.org/t/surface-obs-assimilation-case/542/1 "2023-11-01T22:06:29Z")

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Is there anyone has a successful test case of assimilation surface obs with JEDI?  
If so, I would appreciate sharing your raml and obs input files for me to test.

In my test case, I got an error, which I do not understand why geopotential\_height is needed for surface obs assimilation:

neededVars remaining after Vader::changeVar: 10 variables: eastward\_wind, northward\_wind, geopotential\_height, surface\_temperature, surface\_geopotential\_height, surface\_roughness\_length, land\_area\_fraction, wind\_reduction\_factor\_at\_10m, height, surface\_altitude  
Field\_fail: Field geopotential\_height cannot be obtained from input fields.

0: Field\_fail: Field geopotential\_height cannot be obtained from input fields.  
1: Field\_fail: Field geopotential\_height cannot be obtained from input fields.

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**Author:** ![CoryMartin-NOAA](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.jcsda.org/corymartin-noaa/32/46_2.png) [@CoryMartin-NOAA](https://forums.jcsda.org/u/CoryMartin-NOAA)\
**Post date:** [November 2, 2023, 8:55pm UTC](https://forums.jcsda.org/t/surface-obs-assimilation-case/542/2 "2023-11-02T20:55:08Z")

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I think we resolved this during EMC’s JEDI junction this afternoon, is that correct, Hui? If so, we can probably consider this “closed”?