Spherical Earth Elevation Angle

Determines elevation angle based on spherical Earth.
Updated 29 Jul 2011

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angle of a target based on ground range (GR), altitude of the observer
(H1) and the altitude of the target (H2), and the effective radius of
the Earth (REFFECTIVE). Ground range and rEffective are in meters.
Altitudes are in meter MSL. and elevation is output in degrees with 0
being parrellel to the ground and 90 being straight up.

Example: The difference between spherical and flat Earth
earthRadius = 6371000;
flatEarthRadius = inf;
oalt = 1000; % Obeserver altitude (m MSL)
talt = 1100; % Target altitude (m MSL)
GRs = logspace(3,7,1000); % From 1 km to 1000 km
elevSpherical = getElevationAngle(GR,oalt,talt,earthRadius);
elevFlat = getElevationAngle(GR,oalt,talt,flatEarthRadius);
xlabel('Ground Range (km)')
ylabel('Elevation Angle (deg)')
legend('Spherical Earth','Flat Earth')
title('Elevation Angle')

Cite As

Jonathan Sullivan (2024). Spherical Earth Elevation Angle (https://www.mathworks.com/matlabcentral/fileexchange/32383-spherical-earth-elevation-angle), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2011a
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes

Fixed spelling mistake in the comment file.