+x Tony N - 7/22/2023 4:50:36 PM+x trettum - 7/17/2023 9:25:27 AMI would like to bumb this thread and make a request to fully integrate Safesky into SkyDemon, like AirNavPro have done > https://www.safesky.app/devices/safesky-and-air-navigation-pro)One thing to bear in mind is that SafeSky aircraft "transmit" their GPS derived altitude and not one referenced to1013.2 hPa, which is what devices like Mode S ES transponders and SkyEcho 2 use.This will mean that SkyDemon's collision avoidance algorithms won't work that well if you are receiving both SafeSky positions and ADS-B Out positions.I believe that SafeSky is aware of this issue and is trying to figure out how to ensure that SafeSky altitudes are compatible with ADS-B Out (1013.2) referenced altitudes.Tony
+x trettum - 7/17/2023 9:25:27 AMI would like to bumb this thread and make a request to fully integrate Safesky into SkyDemon, like AirNavPro have done > https://www.safesky.app/devices/safesky-and-air-navigation-pro)
+x trettum - 2/10/2024 11:56:35 AM+x Tony N - 7/22/2023 4:50:36 PM+x trettum - 7/17/2023 9:25:27 AMI would like to bumb this thread and make a request to fully integrate Safesky into SkyDemon, like AirNavPro have done > https://www.safesky.app/devices/safesky-and-air-navigation-pro)One thing to bear in mind is that SafeSky aircraft "transmit" their GPS derived altitude and not one referenced to1013.2 hPa, which is what devices like Mode S ES transponders and SkyEcho 2 use.This will mean that SkyDemon's collision avoidance algorithms won't work that well if you are receiving both SafeSky positions and ADS-B Out positions.I believe that SafeSky is aware of this issue and is trying to figure out how to ensure that SafeSky altitudes are compatible with ADS-B Out (1013.2) referenced altitudes.TonySee the information from SafeSky."SafeSky sends its GPS position and altitude to SkyDemon.SkyDemon does not convert or correct altitudes received by SafeSky.We took the time to check and test the scenarios.Today, SafeSky sends its GPS position and altitude to SkyDemon using WGS84. Traffic is therefore sent using the WGS84 datum.SkyDemon does not convert or correct the altitudes received by SafeSky, which is a good thing because our location and other traffic are all at the same level.In theory, GDL90 states that altitudes should be based on 1013hPa. We’ve just tested SkyEcho, using both “Generic GDL90” and “SkyEcho”, and the altitude appears as WGS84 on SkyDemon. So either SkyEcho isn’t following the specification or it knows it should be sending WGS84.The good news is that when we combine SkyDemon, SafeSky and SkyEcho, our position remains WGS84 and all combined SafeSky and SkyEcho traffic is based on the same datum. The smallest differences are due to rounding during conversion and recovery of the different technologies.SafeSky remains a Traffic Awareness solution, and informs you of the position of other traffic, but this in no way removes the need to look outside to validate the traffic announced by SafeSky, or other devices, and then manoeuvre to avoid a collision."