adds expected eta to a scan
add_expected_eta_to_scan( scan, vp, quantity = "dens", param = "DBZH", lat, lon, antenna, beam_angle = 1, k = 4/3, re = 6378, rp = 6357 )
scan | a scan (sweep) of class scan |
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vp | a vertical profile of class vp |
quantity | profile quantity on which to base range corrections, 'eta' or 'dens'. |
param | reflectivity factor scan parameter on which to base range corrections.
Typically the same parameter from which animal densities are estimated for object |
lat | Geodetic latitude of the radar in degrees. If missing taken from |
lon | Geodetic latitude of the radar in degrees. If missing taken from |
antenna | radar antenna height. If missing taken from |
beam_angle | numeric. Beam opening angle in degrees, typically the angle between the half-power (-3 dB) points of the main lobe |
k | Standard refraction coefficient. |
re | Earth equatorial radius in km. |
rp | Earth polar radius in km. |
an object of class 'scan'
to be written