# FM301 attribute sun\_power\_hc

**URL:** <https://openradar.discourse.group/t/fm301-attribute-sun-power-hc/631>\
**Category:** FM301 Data Standard\
**Tags:** data\
**Created:** [August 13, 2025, 1:34pm UTC](https://openradar.discourse.group/t/fm301-attribute-sun-power-hc/631 "2025-08-13T13:34:09Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![guntherhaase](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/guntherhaase/32/441_2.png) [@guntherhaase](https://openradar.discourse.group/u/guntherhaase)\
**Post date:** [August 13, 2025, 1:34pm UTC](https://openradar.discourse.group/t/fm301-attribute-sun-power-hc/631/1 "2025-08-13T13:34:09Z")

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What is the exact definition of the FM301 attribute /radar\_calibration/sun\_power\_hc and what is its purpose?

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**Author:** ![kmuehlbauer](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/kmuehlbauer/32/439_2.png) [@kmuehlbauer](https://openradar.discourse.group/u/kmuehlbauer)\
**Post date:** [August 13, 2025, 1:58pm UTC](https://openradar.discourse.group/t/fm301-attribute-sun-power-hc/631/2 "2025-08-13T13:58:39Z")

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Hi @guntherhaase,

it seems, we need another handbook for this manual of codes 🤣 .

To me it sounds like that are the measured and calibrated power values when the radar is pointed at the sun. But that might have been your first guess, too.

Best,  
Kai

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**Author:** ![guntherhaase](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/guntherhaase/32/441_2.png) [@guntherhaase](https://openradar.discourse.group/u/guntherhaase)\
**Post date:** [August 13, 2025, 2:12pm UTC](https://openradar.discourse.group/t/fm301-attribute-sun-power-hc/631/3 "2025-08-13T14:12:16Z")

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Hi @kmuehlbauer,

would that mean that this information is static between two consecutive calibrations?

Best,  
Günther

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**Author:** ![kmuehlbauer](https://yyz2.discourse-cdn.com/free1/user_avatar/openradar.discourse.group/kmuehlbauer/32/439_2.png) [@kmuehlbauer](https://openradar.discourse.group/u/kmuehlbauer)\
**Post date:** [August 13, 2025, 2:18pm UTC](https://openradar.discourse.group/t/fm301-attribute-sun-power-hc/631/4 "2025-08-13T14:18:38Z")

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Yes, I would assume that. But who knows. Maybe others here have some idea?

Best,

Kai