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+// Chapter 11 example 10
+//------------------------------------------------------------------------------
+clc;
+clear;
+// Given data
+e       = 0.5;      // orbit eccentricity
+ae      = 14000;    // from fig. the distance from center of ellipse to the centre of earth
+
+// Calculations
+a       = ae/e;         // semi major axis
+apogee  = a*(1 + e);    // Apogee in km
+perige  = a*(1 - e);    // perigee in km
+
+// output
+mprintf('Apogee = %d km\n Perigee = %d km',apogee,perige);
+//------------------------------------------------------------------------------