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Table 1.
Technical parameters of the radio surveys considered in this work for the purposes of He II detection.
| SKA-1 MID | DSA-2000 | PUMA | |
|---|---|---|---|
| D [m] | 15 | 5 | 6 |
| Ndish | 197 | 2000 | 5000 |
| fdetec [GHz] | 0.35–15.3 | 0.7–2.0 | 0.2–1.1 |
| Tsys(ν) [K] | ∼25 − 80 | ∼25 | ∼25 |
| δν [kHz] | 13.4 | 162.5 | – |
| B [km] | 1 | 4 | 0.6 |
Notes.D is the diameter of the telescope antenna, Ndish the number of antennas, fdetec the detectable frequency range, Tsys the system temperature, δν the frequency resolution, and B the core baseline.
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