From 848fd66e2c77bd8905ea7217242376d2eceb87f7 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 29 Apr 2013 10:06:48 +0200
Subject: [PATCH] Fix incorrect extraction of vert_rate_sign.

See issue #26. Thanks to @vk1et for reporting and fixing.
---
 dump1090.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dump1090.c b/dump1090.c
index 04ed42e..3837c57 100644
--- a/dump1090.c
+++ b/dump1090.c
@@ -1078,7 +1078,7 @@ void decodeModesMessage(struct modesMessage *mm, unsigned char *msg) {
                 mm->ns_dir = (msg[7]&0x80) >> 7;
                 mm->ns_velocity = ((msg[7]&0x7f) << 3) | ((msg[8]&0xe0) >> 5);
                 mm->vert_rate_source = (msg[8]&0x10) >> 4;
-                mm->vert_rate_sign = (msg[8]&0x8) >> 5;
+                mm->vert_rate_sign = (msg[8]&0x8) >> 3;
                 mm->vert_rate = ((msg[8]&7) << 6) | ((msg[9]&0xfc) >> 2);
                 /* Compute velocity and angle from the two speed
                  * components. */