# Transmission Gains of Constellations

**URL:** <https://learn.safran-navigation-timing.com/t/transmission-gains-of-constellations/826>\
**Category:** Skydel Discussion\
**Created:** [August 31, 2022, 10:54am UTC](https://learn.safran-navigation-timing.com/t/transmission-gains-of-constellations/826 "2022-08-31T10:54:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mohdyaser](https://yyz2.discourse-cdn.com/flex030/user_avatar/learn.safran-navigation-timing.com/mohdyaser/32/422_2.png) [@mohdyaser](https://learn.safran-navigation-timing.com/u/mohdyaser)\
**Post date:** [August 31, 2022, 10:54am UTC](https://learn.safran-navigation-timing.com/t/transmission-gains-of-constellations/826/1 "2022-08-31T10:54:48Z")

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Can I know the transmission gain of the constellations in Skydel?  
I thought it would be written in the gain pattern, but I believe transmission gain of GPS should be 0 dBi, but in the graph it is different.

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**Author:** ![Grace](https://avatars.discourse-cdn.com/v4/letter/g/f17d59/32.png) [@Grace](https://learn.safran-navigation-timing.com/u/Grace)\
**Post date:** [August 31, 2022, 2:54pm UTC](https://learn.safran-navigation-timing.com/t/transmission-gains-of-constellations/826/2 "2022-08-31T14:54:31Z")

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Hi @mohdyaser,

Is your question still related to antenna gain?

Indeed, the antenna gain diagram shows the default antenna gains, and the gain offset option allows to add a general offset value to these gains.

If you want the default antenna gains to be set to zero as well, you can select **“NONE”** option for the constellation band you are simulating:

 ![2022-08-31 10_46_52-Skydel - Untitled (Not Saved)](https://canada1.discourse-cdn.com/flex030/uploads/orolia/original/1X/68df8233bbda682ed22e638664dcff84129a7e53.png)

Regards