FGFS-4.1/gr-air-modes
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How did this go so long without being fixed? Range and bearing were asymptotic due to -- get this -- degree/radian confusion.

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This commit is contained in:
Nick Foster 2012-07-16 14:35:43 -07:00
parent c2129e0eab
commit c866dc9d31
1 changed files with 2 additions and 2 deletions
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python/cpr.py
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@ -153,10 +153,10 @@ def range_bearing(loc_a, loc_b):
delta_lat = b_lat - a_lat delta_lat = b_lat - a_lat
delta_lon = b_lon - a_lon delta_lon = b_lon - a_lon
avg_lat = (a_lat + b_lat) / 2.0 avg_lat = ((a_lat + b_lat) / 2.0) * math.pi / 180
R1 = earth_radius_mi*(1.0-esquared)/pow((1.0-esquared*pow(math.sin(avg_lat),2)),1.5) R1 = earth_radius_mi*(1.0-esquared)/pow((1.0-esquared*pow(math.sin(avg_lat),2)),1.5)
R2 = earth_radius_mi/math.sqrt(1.0-esquared*pow(math.sin(avg_lat),2)) R2 = earth_radius_mi/math.sqrt(1.0-esquared*pow(math.sin(avg_lat),2))
distance_North = R1*delta_lat distance_North = R1*delta_lat