The second test case for propagation is an "shaped" axi-symmetric body of revolution.
The near-field dp/p data (-60.0 to 60 degrees) is provided as X (meters) vs dp/p
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Simulation Conditions for Propagation:
a) Mach number = 1.6
b) Cruise altitude = 15849.6 meters (or 52000.0 feet)
c) Propagation starting distance from the body = 128.93 meters (or 423.0 feet)
d) R/L = 3.0
e) Ground reflection factor = 1.9
f) Ground altitude for each case is the lowest altitude in the corresponding atmospheric profile
g) Acceleration, turn- and climb- rates are all zero
h) Heading (defined as degrees clockwise from East) is zero
i) X (East) and Y (North) components of wind represent the direction the wind is blowing toward.
j) The ground altitude (where the propagation is supposed to stop) is the lowest value in any atmospheric profile table
k) The roll angles are given in degrees
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For loudness calculations, the minimum sampling frequency is 48 kHz
data-submittal: forms for submitting propagation results
Near-field: Near-field dp/p's to be used for propagation
atmospheric_profiles: The atmospheric profiles be used for propagation
NOTES:
1. If the participant uses a non-uniform sampling during propagation, the ground signatures submitted should be resampled to a uniform distribution.
2. Participants can optionally include curved-earth/diffraction or other advanced effects in their results if they have such capabilities in their propagation model.
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Required run
1. Extrapolate given dp/p at three roll angles {-45,0,45} (with 0.0 being under-track) to get the ground signatures using a provided realistic atmospheric profile 3 including wind
Optional runs
1. Extrapolate given dp/p at three roll angles {-45,0,45} to get the ground signatures using a provided standard atmospheric profile with NO wind
2. Extrapolate given dp/p at three roll angles {-45,0,45} to get the ground signatures using a provided realistic atmospheric profile 4 including wind
3. Extrapolate given dp/p at three roll angles {-45,0,45} to get the ground signatures using a provided standard atmospheric profile with NO wind, except fix the relative humidity at 70% at all altitudes
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Required data:
1. Ground signatures and sampling frequencies
2. The lateral cut-off angles on both sides of the carpet
Optional data:
1. Compute ground signatures corresponding to the lateral cut-off angle
2. Loudness metrics (PL, ASEL) corresponding to all the ground signatures being reported
3. Loudness convergence history
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