From 5dbe08c454222b0aca69b47499814604e283d012 Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Fri, 12 Jan 2024 15:28:00 +1100
Subject: [PATCH] AP_ADSB: send absolute height in GPS packet to MXS device

Documentation specifies WGS-84 ellipsoid.
---
 libraries/AP_ADSB/AP_ADSB_Sagetech_MXS.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/AP_ADSB/AP_ADSB_Sagetech_MXS.cpp b/libraries/AP_ADSB/AP_ADSB_Sagetech_MXS.cpp
index 5d170297a7..d4964ba131 100644
--- a/libraries/AP_ADSB/AP_ADSB_Sagetech_MXS.cpp
+++ b/libraries/AP_ADSB/AP_ADSB_Sagetech_MXS.cpp
@@ -641,7 +641,7 @@ void AP_ADSB_Sagetech_MXS::send_gps_msg()
     }
 
     int32_t height;
-    if (_frontend._my_loc.initialised() && _frontend._my_loc.get_alt_cm(Location::AltFrame::ABOVE_TERRAIN, height)) {
+    if (_frontend._my_loc.initialised() && _frontend._my_loc.get_alt_cm(Location::AltFrame::ABSOLUTE, height)) {
         gps.height = height * 0.01;
     } else {
         gps.height = 0.0;