From feddbc561789d96a71b7e3213e96f7cae2b227f8 Mon Sep 17 00:00:00 2001
From: Matthias Wirth <matthias.wirth@gmail.com>
Date: Thu, 26 Mar 2020 00:36:36 +0100
Subject: [PATCH] temperature from mach / tas

---
 html/index.html | 8 ++++++++
 html/script.js  | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/html/index.html b/html/index.html
index ffed3ae..aeec5ed 100644
--- a/html/index.html
+++ b/html/index.html
@@ -346,6 +346,14 @@
 								<span id="selected_crab">n/a</span>
 							</div>
 						</div>
+						<div class="infoRowLine">
+							<div class="infoHeading infoRowFluid fourColumnSection1">
+								<span title="The aircraft's nose heading relative to ground track">Temperature</span>:
+							</div>
+							<div class="infoData infoRowFluid fourColumnSection2">
+								<span id="selected_temp">n/a</span>
+							</div>
+						</div>
 					</div> <!-- Wind -->
 					<div class="sectionTitle">
 						<div class="section-title-content">
diff --git a/html/script.js b/html/script.js
index 940156a..0a74d3c 100644
--- a/html/script.js
+++ b/html/script.js
@@ -1869,6 +1869,14 @@ function refreshSelected() {
     else
         $('#selected_true_heading').text(format_track_brief(selected.true_heading));
 
+    let temp = null;
+    if (selected.mach != null && selected.tas != null) {
+        temp = Math.pow((selected.tas / 661.47 / selected.mach), 2) * 288.15 - 273.15;
+        $('#selected_temp').text(format_track_brief(temp) + 'C');
+    } else {
+        $('#selected_temp').text('n/a');
+    }
+
     $('#selected_speed1').text(format_speed_long(selected.gs, DisplayUnits));
     $('#selected_speed2').text(format_speed_long(selected.gs, DisplayUnits));
     $('#selected_ias').text(format_speed_long(selected.ias, DisplayUnits));