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Junzi Sun 2021-01-23 01:22:19 +01:00
parent 3bb8c361e9
commit a4ce3bfaf1
9 changed files with 36 additions and 36 deletions
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2
pyModeS/c_common.pyx
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@ -228,7 +228,7 @@ cpdef int cprNL(double lat):
cdef int nz = 15
cdef double a = 1 - cos(pi / (2 * nz))
cdef double b = cos(pi / 180.0 * fabs(lat)) ** 2
cdef double b = cos(pi / 180 * fabs(lat)) ** 2
cdef double nl = 2 * pi / (acos(1 - a / b))
NL = floor(nl)
return NL

34
pyModeS/decoder/bds/bds06.py
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@ -27,13 +27,13 @@ def surface_position(msg0, msg1, t0, t1, lat_ref, lon_ref):
msgbin1 = common.hex2bin(msg1)
# 131072 is 2^17, since CPR lat and lon are 17 bits each.
cprlat_even = common.bin2int(msgbin0[54:71]) / 131072.0
cprlon_even = common.bin2int(msgbin0[71:88]) / 131072.0
cprlat_odd = common.bin2int(msgbin1[54:71]) / 131072.0
cprlon_odd = common.bin2int(msgbin1[71:88]) / 131072.0
cprlat_even = common.bin2int(msgbin0[54:71]) / 131072
cprlon_even = common.bin2int(msgbin0[71:88]) / 131072
cprlat_odd = common.bin2int(msgbin1[54:71]) / 131072
cprlon_odd = common.bin2int(msgbin1[71:88]) / 131072
air_d_lat_even = 90.0 / 60
air_d_lat_odd = 90.0 / 59
air_d_lat_even = 90 / 60
air_d_lat_odd = 90 / 59
# compute latitude index 'j'
j = common.floor(59 * cprlat_even - 60 * cprlat_odd + 0.5)
@ -43,8 +43,8 @@ def surface_position(msg0, msg1, t0, t1, lat_ref, lon_ref):
lat_odd_n = float(air_d_lat_odd * (j % 59 + cprlat_odd))
# solution for north hemisphere
lat_even_s = lat_even_n - 90.0
lat_odd_s = lat_odd_n - 90.0
lat_even_s = lat_even_n - 90
lat_odd_s = lat_odd_n - 90
# chose which solution corrispondes to receiver location
lat_even = lat_even_n if lat_ref > 0 else lat_even_s
@ -60,16 +60,16 @@ def surface_position(msg0, msg1, t0, t1, lat_ref, lon_ref):
nl = common.cprNL(lat_even)
ni = max(common.cprNL(lat_even) - 0, 1)
m = common.floor(cprlon_even * (nl - 1) - cprlon_odd * nl + 0.5)
lon = (90.0 / ni) * (m % ni + cprlon_even)
lon = (90 / ni) * (m % ni + cprlon_even)
else:
lat = lat_odd
nl = common.cprNL(lat_odd)
ni = max(common.cprNL(lat_odd) - 1, 1)
m = common.floor(cprlon_even * (nl - 1) - cprlon_odd * nl + 0.5)
lon = (90.0 / ni) * (m % ni + cprlon_odd)
lon = (90 / ni) * (m % ni + cprlon_odd)
# four possible longitude solutions
lons = [lon, lon + 90.0, lon + 180.0, lon + 270.0]
lons = [lon, lon + 90, lon + 180, lon + 270]
# make sure lons are between -180 and 180
lons = [(l + 180) % 360 - 180 for l in lons]
@ -99,11 +99,11 @@ def surface_position_with_ref(msg, lat_ref, lon_ref):
mb = common.hex2bin(msg)[32:]
cprlat = common.bin2int(mb[22:39]) / 131072.0
cprlon = common.bin2int(mb[39:56]) / 131072.0
cprlat = common.bin2int(mb[22:39]) / 131072
cprlon = common.bin2int(mb[39:56]) / 131072
i = int(mb[21])
d_lat = 90.0 / 59 if i else 90.0 / 60
d_lat = 90 / 59 if i else 90 / 60
j = common.floor(lat_ref / d_lat) + common.floor(
0.5 + ((lat_ref % d_lat) / d_lat) - cprlat
@ -114,9 +114,9 @@ def surface_position_with_ref(msg, lat_ref, lon_ref):
ni = common.cprNL(lat) - i
if ni > 0:
d_lon = 90.0 / ni
d_lon = 90 / ni
else:
d_lon = 90.0
d_lon = 90
m = common.floor(lon_ref / d_lon) + common.floor(
0.5 + ((lon_ref % d_lon) / d_lon) - cprlon
@ -153,7 +153,7 @@ def surface_velocity(msg, source=False):
# ground track
trk_status = int(mb[12])
if trk_status == 1:
trk = common.bin2int(mb[13:20]) * 360.0 / 128.0
trk = common.bin2int(mb[13:20]) * 360 / 128
trk = round(trk, 1)
else:
trk = None

4
pyModeS/decoder/bds/bds44.py
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@ -68,7 +68,7 @@ def wind44(msg):
return None, None
speed = common.bin2int(d[5:14]) # knots
direction = common.bin2int(d[14:23]) * 180.0 / 256.0 # degree
direction = common.bin2int(d[14:23]) * 180 / 256 # degree
return round(speed, 0), round(direction, 1)
@ -136,7 +136,7 @@ def hum44(msg):
if d[49] == "0":
return None
hm = common.bin2int(d[50:56]) * 100.0 / 64 # %
hm = common.bin2int(d[50:56]) * 100 / 64 # %
return round(hm, 1)

6
pyModeS/decoder/bds/bds50.py
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@ -78,7 +78,7 @@ def roll50(msg):
if sign:
value = value - 512
angle = value * 45.0 / 256.0 # degree
angle = value * 45 / 256 # degree
return round(angle, 1)
@ -102,7 +102,7 @@ def trk50(msg):
if sign:
value = value - 1024
trk = value * 90.0 / 512.0
trk = value * 90 / 512.0
# convert from [-180, 180] to [0, 360]
if trk < 0:
@ -151,7 +151,7 @@ def rtrk50(msg):
if sign:
value = value - 512
angle = value * 8.0 / 256.0 # degree / sec
angle = value * 8 / 256 # degree / sec
return round(angle, 3)

2
pyModeS/decoder/bds/bds53.py
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@ -78,7 +78,7 @@ def hdg53(msg):
if sign:
value = value - 1024
hdg = value * 90.0 / 512.0 # degree
hdg = value * 90 / 512 # degree
# convert from [-180, 180] to [0, 360]
if hdg < 0:

2
pyModeS/decoder/bds/bds60.py
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@ -86,7 +86,7 @@ def hdg60(msg):
if sign:
value = value - 1024
hdg = value * 90 / 512.0 # degree
hdg = value * 90 / 512 # degree
# convert from [-180, 180] to [0, 360]
if hdg < 0:

18
pyModeS/extra/aero.py
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@ -35,18 +35,18 @@ ft = 0.3048 # ft -> m
fpm = 0.00508 # ft/min -> m/s
inch = 0.0254 # inch -> m
sqft = 0.09290304 # 1 square foot
nm = 1852.0 # nautical mile -> m
nm = 1852 # nautical mile -> m
lbs = 0.453592 # pound -> kg
g0 = 9.80665 # m/s2, Sea level gravity constant
R = 287.05287 # m2/(s2 x K), gas constant, sea level ISA
p0 = 101325.0 # Pa, air pressure, sea level ISA
p0 = 101325 # Pa, air pressure, sea level ISA
rho0 = 1.225 # kg/m3, air density, sea level ISA
T0 = 288.15 # K, temperature, sea level ISA
gamma = 1.40 # cp/cv for air
gamma1 = 0.2 # (gamma-1)/2 for air
gamma2 = 3.5 # gamma/(gamma-1) for air
beta = -0.0065 # [K/m] ISA temp gradient below tropopause
r_earth = 6371000.0 # m, average earth radius
r_earth = 6371000 # m, average earth radius
a0 = 340.293988 # m/s, sea level speed of sound ISA, sqrt(gamma*R*T0)
@ -94,8 +94,8 @@ def distance(lat1, lon1, lat2, lon2, H=0):
"""
# phi = 90 - latitude
phi1 = np.radians(90.0 - lat1)
phi2 = np.radians(90.0 - lat2)
phi1 = np.radians(90 - lat1)
phi2 = np.radians(90 - lat2)
# theta = longitude
theta1 = np.radians(lon1)
@ -158,16 +158,16 @@ def tas2eas(Vtas, H):
def cas2tas(Vcas, H):
"""Calibrated Airspeed to True Airspeed"""
p, rho, T = atmos(H)
qdyn = p0 * ((1.0 + rho0 * Vcas * Vcas / (7.0 * p0)) ** 3.5 - 1.0)
Vtas = np.sqrt(7.0 * p / rho * ((1.0 + qdyn / p) ** (2.0 / 7.0) - 1.0))
qdyn = p0 * ((1 + rho0 * Vcas * Vcas / (7 * p0)) ** 3.5 - 1.0)
Vtas = np.sqrt(7 * p / rho * ((1 + qdyn / p) ** (2 / 7.0) - 1.0))
return Vtas
def tas2cas(Vtas, H):
"""True Airspeed to Calibrated Airspeed"""
p, rho, T = atmos(H)
qdyn = p * ((1.0 + rho * Vtas * Vtas / (7.0 * p)) ** 3.5 - 1.0)
Vcas = np.sqrt(7.0 * p0 / rho0 * ((qdyn / p0 + 1.0) ** (2.0 / 7.0) - 1.0))
qdyn = p * ((1 + rho * Vtas * Vtas / (7 * p)) ** 3.5 - 1.0)
Vcas = np.sqrt(7 * p0 / rho0 * ((qdyn / p0 + 1.0) ** (2 / 7.0) - 1.0))
return Vcas

2
pyModeS/py_common.py
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@ -199,7 +199,7 @@ def cprNL(lat: float) -> int:
nz = 15
a = 1 - np.cos(np.pi / (2 * nz))
b = np.cos(np.pi / 180.0 * abs(lat)) ** 2
b = np.cos(np.pi / 180 * abs(lat)) ** 2
nl = 2 * np.pi / (np.arccos(1 - a / b))
NL = floor(nl)
return NL

2
tests/test_allcall.py
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@ -6,7 +6,7 @@ def test_icao():
def test_interrogator():
assert allcall.interrogator("5D484FDEA248F5") == 22
assert allcall.interrogator("5D484FDEA248F5") == "SI6"
def test_capability():