# Differential GPS Scenarios

**URL:** <https://learn.safran-navigation-timing.com/t/differential-gps-scenarios/186>\
**Category:** Skydel Discussion\
**Created:** [June 7, 2021, 4:37pm UTC](https://learn.safran-navigation-timing.com/t/differential-gps-scenarios/186 "2021-06-07T16:37:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jaemin.powell](https://avatars.discourse-cdn.com/v4/letter/j/b5ac83/32.png) [@jaemin.powell](https://learn.safran-navigation-timing.com/u/jaemin.powell)\
**Post date:** [June 7, 2021, 4:37pm UTC](https://learn.safran-navigation-timing.com/t/differential-gps-scenarios/186/1 "2021-06-07T16:37:31Z")

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Can Skydel simulate differential GPS information to a receiver via dGPS messages and/or multi-instance? How would you recommend setting up those scenarios?

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**Author:** ![Sylvain](https://yyz2.discourse-cdn.com/flex030/user_avatar/learn.safran-navigation-timing.com/sylvain/32/30_2.png) [@Sylvain](https://learn.safran-navigation-timing.com/u/Sylvain)\
**Post date:** [June 8, 2021, 7:36am UTC](https://learn.safran-navigation-timing.com/t/differential-gps-scenarios/186/2 "2021-06-08T07:36:23Z")

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Hi Jeamin,  
Yes , SKYDEL has many useful features to handle differential GNSS setup and scenarios.  
Actualy, it is a very flexible tool for DGPS testing.  
It can use multi-instance feature to simulate (using same hardware multiple RF output for dual generation or also simulating RTK/RTCM links thanks to our new plugin capability - future release to come soon ! )  
_Link to example of Multi-Instance setup for RTK case.[Orolia Skydel User Manual](http://manuals.spectracom.com/skydel/index.html#hw-setup-dektec-dta-2115B-rtk)_

I have also attached RTK slides (PDF) that describes our different concepts available for SKYDEL.  
[RTK&SKYDEL.pdf](https://learn.safran-navigation-timing.com/uploads/short-url/lIY8UULFRinzFK6HX0ITYsgrtCn.pdf) (937.0 KB)

You have also SKY-SBAS License that allows user to set specific cases for SBAS satellites.  
[http://manuals.spectracom.com/skydel/index.html#settings-sbas](http://manuals.spectracom.com/skydel/index.html#settings-sbas)

Managing Constellation error injection tools in SKYDEL will allow user to check the effectiveness of SBAS constellation during the simulation.

Here example for atmosphere impact  
[http://manuals.spectracom.com/skydel/index.html#settings-atmosphere-errors](http://manuals.spectracom.com/skydel/index.html#settings-atmosphere-errors)

I hope this will help.  
Kind regards  
Sylvain Dessapt