From 56a68094865939006c7e709ac42152e03660ec21 Mon Sep 17 00:00:00 2001
From: Daniel Agar <daniel@agar.ca>
Date: Tue, 24 Nov 2015 18:05:42 -0500
Subject: [PATCH] HIL calculate TAS from IAS

---
 src/modules/mavlink/mavlink_receiver.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/modules/mavlink/mavlink_receiver.cpp b/src/modules/mavlink/mavlink_receiver.cpp
index 0c2180a4d8..bf79b6e09f 100644
--- a/src/modules/mavlink/mavlink_receiver.cpp
+++ b/src/modules/mavlink/mavlink_receiver.cpp
@@ -1325,8 +1325,7 @@ MavlinkReceiver::handle_message_hil_sensor(mavlink_message_t *msg)
 		struct airspeed_s airspeed = {};
 
 		float ias = calc_indicated_airspeed(imu.diff_pressure * 1e2f);
-		// XXX need to fix this
-		float tas = ias;
+		float tas = calc_true_airspeed_from_indicated(ias, imu.abs_pressure * 100, imu.temperature);
 
 		airspeed.timestamp = timestamp;
 		airspeed.indicated_airspeed_m_s = ias;