From 35250990c9ca82381b205082ef5eed28bb23ab7c Mon Sep 17 00:00:00 2001
From: Jacek Jendrzej <overx300@gmail.com>
Date: Mon, 25 Oct 2021 11:34:58 +0200
Subject: [PATCH] frontend: avoid division by zero

---
 src/zapit/src/frontend.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/zapit/src/frontend.cpp b/src/zapit/src/frontend.cpp
index ff75370cc..7b3ee7abe 100644
--- a/src/zapit/src/frontend.cpp
+++ b/src/zapit/src/frontend.cpp
@@ -2483,8 +2483,11 @@ double calcAzimuth(double SatLon, double SiteLat, double SiteLon, int Height_ove
 	if (alfa_r_north < 0)
 		Azimuth = 180 + Deg(ATAN(alfa_ry / alfa_r_north));
 	else
+	{
+		if(alfa_r_north == 0)
+			alfa_r_north = 0.0001;;
 		Azimuth = Rev(360 + Deg(ATAN(alfa_ry / alfa_r_north)));
-
+	}
 	return Azimuth;
 }