A southern sky survey in the H I 21 cm line, at declinations between -90° and -15°, was done at the Instituto Argentino de Radioastronomía. The observations were made on a 2°/cos δ×2° grid, covering a velocity range between -650 and +650 km s⁻¹, with an angular resolution of 34arcmin (HPBW) and a velocity resolution of 16 km s⁻¹. The rms noise on the spectra is 0.025K. The results are presented in a table and maps. A whole-sky map containing all known data on high-velocity H I is also included.
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Bajaja et al. (1985) studied this question.