width = 12 ; 12 metres wide height = 2 ; 2 metres high base = 0.05 ; base of loop almost at ground level coil { ; Loop in xz plane (east-west response) name loop end1 { -width/2, 0, base } ; Lower west corner { -width/2, 0, base + height} ; Upper west corner { width/2, 0, base + height} ; Upper east corner { width/2, 0, base } ; Lower east corner length 0 turns 3 wirad 0.6e-3 } ground { center 0,0,0 axis 0,0 } ; Horizontal ground at z = 0 field { magnetic 90,90 } ; Magnetic field in +y direction to ; represent EM wave arriving from east/west