fix corner case

2 years ago · b36540e2a1
parent c02414417d
commit b36540e2a1
1 changed files with 2 additions and 2 deletions
--- a/pyModeS/decoder/bds/bds09.py
+++ b/pyModeS/decoder/bds/bds09.py
@ -81,10 +81,10 @@ def airborne_velocity(msg, source=False):

        spd = common.bin2int(mb[25:35])

-        spd = None if spd == 0 else spd - 1
-
        if subtype == 4:  # Supersonic
            spd *= 4
+            
+        spd = None if spd == 0 else spd - 1

        if mb[24] == "0":
            spd_type = "IAS"