etendue of incoming radiation (m2
sr)
U1 etendue of reflected radiation to receiver 1 (m2
sr)
U2 etendue of reflected radiation to receiver 2 (m2
sr )
ɲ angle of the curve (϶)
ʔ1, ʔ2 angle from point on the mirror to receiver 1,2 (϶)
xp x-coordinate for turning point of the parabola (m)
yp y-coordinate for turning point of the parabola (m)
H height of the receivers (m)
D width of the mirror field (m)
ʇ1,ʇ2 angle in radiation splitter (϶)
Ȗ1Ȗ2 angle in radiation splitter (϶)
ɽ sun angle(϶