# Question about CMAQ-DDM v5.2 output variables

**URL:** https://forum.cmascenter.org/t/question-about-cmaq-ddm-v5-2-output-variables/982
**Category:** Post-processing
**Created:** [September 28, 2019, 6:25am UTC](https://forum.cmascenter.org/t/question-about-cmaq-ddm-v5-2-output-variables/982 "2019-09-28T06:25:06Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![lizadams](https://avatars.discourse-cdn.com/v4/letter/l/49beb7/32.png) [@lizadams](https://forum.cmascenter.org/u/lizadams)
#### Post date: [September 29, 2019, 12:59pm UTC](https://forum.cmascenter.org/t/question-about-cmaq-ddm-v5-2-output-variables/982/3 "2019-09-29T12:59:47Z")

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Hi Ryan,

The tag ENX is defined in the sensinput.cmas.dat  
It was defined as the sensitivity of ozone to NO and NO2.

The tag ESX is defined in the sensinput.cmas.dat as the sensitivity of ozone to SO2.

https://www.airqualitymodeling.org/index.php/CMAQ\_version\_5.2\_DDM\_Technical\_Documentation

There was another issue in this forum that describes the setup for determining the sensitivity to NOX from the transportation sector that may be helpful.  
[https://forum.cmascenter.org/t/cmaq-ddm-3d-sensinput-file-setting-about-ddm3d-es-emissions-split-into-categories-sensitivity/632](https://forum.cmascenter.org/t/cmaq-ddm-3d-sensinput-file-setting-about-ddm3d-es-emissions-split-into-categories-sensitivity/632)

Liz

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