To MMA Memo #163: A STRAWMAN OPTICS LAYOUT FOR THE MMA ANTENNA

Figure 1:MMA Optical Configuration, Version 1.

  Table 1: Dimensions of MMA Optical Configuration, Version 1.

Table 1: Dimensions of MMA Optical Configuration, Version 1.

D	Primary Aperture	8,000 mm	315.0 inches
fp	Focal length of primary	3,040.38 mm	119.7 inches
	fp/D of primary	0.38	0.38
d	Secondary aperture	530.86 mm	20.90 inches
	Final f/D	8.39	8.39
	Magnification factor	22.08	22.08
theta p	Primary angle of illumination	133.36 deg	133.36 deg
theta s	Secondary angle of illumination	6.83 deg	6.83 deg
2c	Distance between primary and secondary foci	4,564.0 mm	179.7 inches
H	Depth of primary	1,316.0 mm	51.8 inches
r1	Tipping structure apex radius (1" clearance) [close packing 1.36 D]	5,433.0 mm	213.9 inches
r2	Tipping structure dish radius (1" clearance) [closepacking 1.28 D]	5,114.0 mm	201.3 inches
h	Distance from vertex to secondary focus	1,524.0 mm	60.00 inches
a	Distance from elevation axis to focus	304.8 mm	12.00 inches
b	Distance from elevation axis to base of center cone	152.4 mm	6.00 inches
g	Distance from primary focus to top of quadrapod	533.4 mm	21.0 inches
x	Clear aperture at receiver cabin window	480.06 mm	18.9 inches
	Center cone base inside diameter	2,844.80 mm	112 inches
u	Center cone height	1,506.22 mm	59.3 inches
v	Center cone and primary surface inside diameter	530.86 mm	20.90 inches
j	Receivercabininsidewidthanddepth(square)	2,794.0 mm	110 inches
k	Receiver cabin inside height	2,006.60 mm	79.0 inches
m	Receiver cabin door width	1,016.0 mm	40.0 inches
n	Receiver cabin door height	1,676.4 mm	66.0 inches
R	Receiver cabin door fillet	101.6 mm	4.0 inches
w	Distance from primary focus to edge of secondary mirror	114.414 mm	4.5045 inches
y	Distance from primary focus to front face of secondary mirror	197.772 mm	7.7863 inches