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Grazing Angle (Earth)

ψg=f(R,h)
(h)Altitude of object above the Earth Geoid
(R)Range from ground point to object.

The Grazing Angle calculator computes the angle (ψ) above the Earth's horizon to an object.

INSTRUCTIONS: Choose your preferred units and enter the following:/attachments/d0d5da0f-f21c-11e6-9770-bc764e2038f2/GrazingAngle.png  Earth Grazing Angle

  • (R)  This is the range from the ground to the object
  • (h)  This is the vertical height of the object above the Geoid.

Grazing Angle: The calculator return the grazing angle (ψ) in degrees.  However this can be automatically converted to other angle units via the pull-down menu.

NOTE: The Grazing Angle can be negative.  This means that the object is below the horizon.

The Math / Science

The Grazing Angle equationSignal-to-Noise of a Synthetic Aperture Radar.

This algorithm use the mean radius of the Earth and h is the height above that.


Earth Model Calculators

  1. ^ Performance Limits for Synthetic Aperture Radar - Second Edition.  Sandia National Laboratories, Albuquerque, NM.  Printed February 2006.