FGFS-4.1/pyModeS
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minor update

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This commit is contained in:
junzis 2017-07-21 15:57:32 +02:00
parent 1e842e4789
commit 0e29a4d18a
1 changed files with 5 additions and 1 deletions
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pyModeS/adsb.py
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@ -679,4 +679,8 @@ def altitude_diff(msg):
msgbin = util.hex2bin(msg) msgbin = util.hex2bin(msg)
sign = -1 if int(msgbin[80]) else 1 sign = -1 if int(msgbin[80]) else 1
value = util.bin2int(msgbin[81:88]) * 25 value = util.bin2int(msgbin[81:88]) * 25
return sign * value
if value == 0 or value == 127:
return None
else:
return sign * value