Table 2.

Frequency bands of the Kashima observatory

channel k	frequency (MHz) minimum-maximum	original bandwidth (MHz)	effective bandwidth (MHz) after filterization (Δvk)
ch0	1404–1436	32	20.48
ch1	1570–1602	32	16.00
ch2	1596–1628	32	-
ch3	1622–1654	32	-
ch4	1648–1680	32	24.83
ch5	1674–1706	32	21.82
ch6	1700–1732	32	23.23
(ch7)	(1702–1734)	(32)	-

The frequency range between ch0 and ch1, 1436–1570MHz, is avoided so as to minimize the radio frequency interference (RFI) from cellphone base stations. Only the right-hand circular polarized signals were received. In the coherent dedispersion process for each channel, the timing of the voltage data is adjusted to that for the maximum frequency of the channel.