Fix calculation of vertical rate

The sign bit was incorrectly included in the vertical rate calculation, which resulted in all negative vertical rates being -255 or smaller
2016-08-15 10:08:58 +01:00 · 2016-08-15 10:08:58 +01:00 · 2ee87c8c61
commit 2ee87c8c61
parent 8ef02fa2b1
1 changed files with 1 additions and 1 deletions
--- a/pyModeS/adsb.py
+++ b/pyModeS/adsb.py
@ -344,7 +344,7 @@ def velocity(msg):
        tag = 'AS'

    vr_sign = util.bin2int(msgbin[68])
-    vr = util.bin2int(msgbin[68:77])             # vertical rate
+    vr = util.bin2int(msgbin[69:77])             # vertical rate
    rocd = -1*vr if vr_sign else vr         # rate of climb/descend

    return int(spd), round(hdg, 1), int(rocd), tag