Table 1
Summary of various datasets used in the experiments.
| Dataset | I | II | III | IV |
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| Sources | Point sources | Boötes field | “Toothbrush” cluster RX J0603.3+4214 | |
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| Data type | Simulated | Actual observation | Actual observation | |
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| Antenna layout | LOFAR core stations (HBA) | LOFAR core and remote stations (HBA) | LOFAR core and remote stations (HBA) | |
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| Number of stations | 24 | 28* | 36 | |
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| Telescope focus (RA, Dec) | (14h32m00.0s, + 34°30′00.1′′) | (14h32m00.0s, + 34°30′00.1′′) | (06h03m20.0s, + 42°14′00.0′′) | |
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| Longest baseline (× wavelength) | 713.3 | 1015.4 | 1019.9 | 1150.3 |
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| Instrument angular resolution | 4′49.2′′ | 3′23.1′′ | 3′22.2′′ | 2′59.3′′ |
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| Polarization | I | |||
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| Observation start time (UTC) | 2014-08-10-13:00:04.01 | 2014-08-10-13:00:04.01 | 2013-02-24-15:32:01.42 | |
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| Observation end time (UTC) | 2014-08-10-19:53:58.48 | 2014-08-10-20:07:19.59 | 2013-02-25-00:09:24.51 | |
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| Time resolution (s) | 400.56 | 400.56 | 3204.45 | 500.70 |
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| Number of integration times | 63 | 72 | 9 | 63 |
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| Number of sub-bands | 1 | 1 | 8 | 1 |
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| Sub-band frequency (MHz) | 145.8 | 145.8 | 145.8 ~ 146.5 | 132.1 |
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| Section | 3.2, 3.3 and 3.4 | 3.5 | 3.5 | 3.6 |
Notes. The LOFAR antenna layout is used in simulation (Dataset I). We have sub-sampled the real observations over different integration times such that only 2% (for the single band cases: Dataset II and IV) or 0.25% (for the multi-band case: Dataset III) of the total integration times is available to the FRI reconstruction algorithm.
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