Mount Wilson	Hale Telescope	Hale Telescope	Hale Telescope
FIG. aa-01	FIG. aa-02	FIG. aa-03	FIG. aa-04
.	.	by: Hale Observatories	by: Hale Observatories
Hale Telescope	The 48-inch Schmidt Telescope on Palomar	Osservatorio Astronomico -Loiano	Osservatorio Astronomico-Loiano
FIG. aa-05	FIG. aa-06	FIG. aa-07	FIG. aa-08
by: Hale Observatories	by: California Institute of Technology	.	.
Onsala	Jodrell Bank	Bonn	Effelsberg
FIG. bb-01	FIG. bb-02	FIG. bb-03	FIG. bb-04
.	.	.	.
WSRT	VLA	VLA	VLA
FIG. bb-05	FIG. bb-06	FIG. bb-07	FIG. bb-08
.	.	.	.
Arecibo	Arecibo	Arecibo	Arecibo
FIG. bb-09	FIG. bb-10	FIG. bb-11	FIG. bb-12
.	.	.	.