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Table 2

Overview of LOFAR system parameters.

System characteristic Options Values Comments

Frequency range Low-band Antenna 10–90 MHz
30–90 MHz With analog filter
High-band Antenna 110–190 MHz 200 MHz sampling (2nd Nyquist zone)
170–230 MHz 160 MHz sampling (3rd Nyquist zone)
210–250 MHz 200 MHz sampling (3rd Nyquist zone)

Number of polarizations 2

Bandwidth Default 48 MHz 16-bit mode
Maximum 96 MHz 8-bit mode

Number of simultaneous beams Minimum 1
Maximum 244 16 bit mode, one per sub-band
Maximum 488 8 bit mode, one per sub-band

Sample bit depth 12

Sample rate Mode 1 160 MHz
Mode 2 200 MHz

Beamformer spectral resolution Mode 1 156 kHz
Mode 2 195 kHz

Channel width Mode 1 610 Hz
(raw correlator resolution) Mode 2 763 Hz

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