[alma-config] Sidelobe level
morita
morita at nro.nao.ac.jp
Mon Jun 19 18:15:54 EDT 2000
Hi all,
sorry for my long absence.
As Mark pointed out, my evaluation of the near sidelobe level for the
SPIRAL array was wrong. I set radial range of [1xFWHM, 10xFWHM]
as near sidelobe area. This minimum radius is too small for
the SPIRAL array and I took a main beam wing as the peak sidelobe
level. I re-evaluate the near sidelobe level over the radial range
of [2xFWHM, 10xFWHM] for the SPIRAL array. Following table shows
revised results.
+-----------------------------------------------------------------------+
Array HA range Near Sidelobe (%) Far Sidelobe (%)
(hour) peak rms peak rms
+-----------------------------------------------------------------------+
SPIRAL [0.0, 0.1] 6.53 1.25 13.48 1.56
RING [0.0, 0.1] 17.61 2.85 13.56 1.36
SPIRAL [0.0, 1.0] 5.37 1.10 8.49 0.90
RING [0.0, 1.0] 17.34 2.83 6.56 0.89
SPIRAL [-3.0, 3.0] 2.12 0.60 2.30 0.38
RING [-3.0, 3.0] 16.75 2.60 2.71 0.59
+-----------------------------------------------------------------------+
Regards,
Koh-Ichiro
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