Jian Dong, Zhiqiang Xu, Yunxia Sun, Qinghui Liu. Fast Measurement of Primary Reflector Dynamic Deformation of Radio Telescope Based on Multibeam and Phase Retrieval[J]. Acta Optica Sinica, 2018, 38(6): 0612005
- Acta Optica Sinica
- Vol. 38, Issue 6, 0612005 (2018)
Fig. 1. (a) Multibeam patterns and (b) splicing beam pattern plotted in contour
Fig. 2. Flow chart of fast measurement method
Fig. 3. Simulation measurement diagram
Fig. 4. 7 beam Q-band feed configuration diagram
Fig. 5. Input deformation simulation under three typical conditions. (a) Gravitational deformation at 30°; (b) gravitational deformation at 70°; (c) thermal deformation at a given time
Fig. 6. Calculated patterns under three typical conditions. (a) Gravitational deformation at 30°; (b) gravitational deformation at 70°; (c) thermal deformation at a given time
Fig. 7. Splicing patterns under three typical conditions. (a) Gravitational deformation at 30°; (b) gravitational deformation at 70°; (c) thermal deformation at a given time
Fig. 8. (a) Retrieval deformation and (b) residual deformation without noise under three typical conditions
Fig. 9. (a) Retrieval deformation and (b) residual deformation with signal-to-noise of 150∶1 under three typical conditions
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Table 1. Offset of each beam pattern relative to the center
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Table 2. Simulation results without noise under three typical conditions
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Table 3. Simulation results with signal-to-noise of 150∶1 under three typical conditions
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Table 4. Measurement error induced by pointing error
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Table 5. Measurement error induced by amplitude fluctuation
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