Log ground speed instead of air speed

mavsdk_wrapper.cpp

@@ -146,14 +146,11 @@ int mavsdk_start(const char * url, const char * log_file, int timeout) {
             log("Subscribing to raw GPS...");
             telemetry->subscribe_raw_gps([](Telemetry::RawGps gps) {
                 std::ostringstream oss;
-                Telemetry::FixedwingMetrics metrics = telemetry->fixedwing_metrics();
-                Telemetry::Position position = telemetry->position();
-
                 oss << (gps.timestamp_us - init_timestamp) / 1000 << ";"
                     << gps.latitude_deg << ";" << gps.longitude_deg << ";"
-                    << gps.absolute_altitude_m << ";" << position.relative_altitude_m << ";"
+                    << gps.absolute_altitude_m << ";" << telemetry->position().relative_altitude_m << ";"
                     << telemetry->attitude_euler().yaw_deg << ";"
-                    << metrics.airspeed_m_s << ";" << metrics.climb_rate_m_s;
+                    << gps.velocity_m_s << ";" << telemetry->fixedwing_metrics().climb_rate_m_s;
                 log(oss.str());
             });          
         }
@@ -182,7 +179,7 @@ int mavsdk_start(const char * url, const char * log_file, int timeout) {
 
     log("MAVSDK started...");
     mavsdk_started = 1;
-    log("timestamp;latitude;longitude;AMSL (m);rel altitude (m);yaw(°);air speed (m/s);climb rate(m/s)");
+    log("timestamp (ms);latitude (°);longitude (°);AMSL (m);rel altitude (m);yaw (°);ground speed (m/s);climb rate (m/s)");
     return 0;
 }