FGFS-4.1/pyModeS
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

BDS09 returns direction and v/s source

Browse Source
This commit is contained in:
Alexander Hirsch 2019-05-16 19:05:19 -07:00
parent 8cd5655a04
commit c9159feb7d
1 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
pyModeS/decoder/bds/bds09.py
View File

@ -32,9 +32,13 @@ def airborne_velocity(msg):
msg (string): 28 bytes hexadecimal message string
Returns:
(int, float, int, string): speed (kt), ground track or heading (degree),
rate of climb/descend (ft/min), and speed type
('GS' for ground speed, 'AS' for airspeed)
(int, float, int, string, string, string): speed (kt),
ground track or heading (degree),
rate of climb/descent (ft/min), speed type
('GS' for ground speed, 'AS' for airspeed),
direction source ('gnd_trk' for ground track, 'mag_hdg' for
magnetic heading), rate of climb/descent source ('Baro' for
barometer, 'GNSS' for GNSS constellation)
"""
if common.typecode(msg) != 19:
@ -66,6 +70,7 @@ def airborne_velocity(msg):
tag = 'GS'
trk_or_hdg = round(trk, 2)
dir_type = 'gnd_trk'
else:
if mb[13] == '0':
@ -83,12 +88,15 @@ def airborne_velocity(msg):
tag = 'IAS'
else:
tag = 'TAS'
dir_type = 'mag_hdg'
vr_source = 'GNSS' if mb[35]=='0' else 'Baro'
vr_sign = -1 if mb[36]=='1' else 1
vr = common.bin2int(mb[37:46])
rocd = None if vr==0 else int(vr_sign*(vr-1)*64)
return spd, trk_or_hdg, rocd, tag
return spd, trk_or_hdg, rocd, tag, dir_type, vr_source
def altitude_diff(msg):
"""Decode the differece between GNSS and barometric altitude