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Table 1

Data sets used in this study.

Data θ Δv ΔT References
[arcmin] [km s-1] [mK]

EBHIS 10.8 1.29 90 (1)
GASS 16.1 0.82 57 (2)
Planck τ 5.27 (3)

Notes. The columns list the angular resolution θ, the spectral channel width Δv, and the brightness temperature noise ΔT.

Reference. (1) Winkel et al. (2016a, 2010), Kerp et al. (2011); (2) McClure-Griffiths et al. (2009), Kalberla et al. (2010), Kalberla & Haud (2015); (3) Planck Collaboration XI (2014).

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