International Journal of Antennas and Propagation / 2018 / Article / Tab 4

Review Article

Active Surface Compensation for Large Radio Telescope Antennas

Table 4

Four radio telescopes with active main surface.

NameForms of main reflectorsSurface accuracy (mm)Number of blocksTypes of panelsShapes of panelsManufacturing accuracy of single panel (μm)Number of actuators

GBTOffset Gregorian0.24200444 ringsTrapezoid682209
LMTStandard Cassegrain0.0751805 ringsIrregular quadrilateral (combination)<40720
SRTShaped Gregorian0.15100814 ringsTrapezoid<651116
TianmaShaped Cassegrain0.3100814 ringsTrapezoid<1301104