Active Surface Compensation for Large Radio Telescope Antennas

Table 3

Typical radio telescopes with active surface.

Name	Aperture/m	Total mass/t	Frequency/GHz	Surface accuracy/mm	Pointing precision/(“)	Year of work	Remarks
GBT	100 × 110	7856	0.1–116	0.24	1.5	2000	America
LMT	50	800	75–350	0.075	1.08	2008	America, Mexico
HUSIR	37	340	85–115	0.1	3.6	2010	America; adjustable secondary reflector
Effelsberg	100	3200	0.395–95	1	10	1972	Germany; adjustable secondary reflector
SRT	64	3000	0.3–115	0.15	5	2011	Italy
Tianma	65	2640	1.25–46 (L/S/C/X/Ku/K/Ka/Q)	0.3	3	2012	China
FAST	500	30 (feed cabin)	70 MHz–3 GHz	1-2	4	2016	China