From 161ea31ee1d3ebffc617ae7c006a8ce65ea51055 Mon Sep 17 00:00:00 2001
From: Huy Vu <>
Date: Tue, 27 Mar 2018 13:04:52 +0200
Subject: [PATCH] Minor change BDS 5,0 roll, if status and sign bit are both 1,
 roll angle was -90 degrees.

---
 pyModeS/decoder/bds/bds50.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyModeS/decoder/bds/bds50.py b/pyModeS/decoder/bds/bds50.py
index 7d759bd..2584db9 100644
--- a/pyModeS/decoder/bds/bds50.py
+++ b/pyModeS/decoder/bds/bds50.py
@@ -55,7 +55,7 @@ def isBDS50(msg):
     if wrongstatus(d, 46, 47, 56):
         return False
 
-    if d[2:11] != "000000000":
+    if d[1:11] != "0000000000":
         roll = abs(roll50(msg))
         if roll and roll > 60:
             return False