Surveys of Galactic Hydrogen
Joachim Köppen Kiel Sept.2013 ... Jan.2019


Some brief explanations

This tool shows the results from several surveys of galactic hydrogen, at the radio line of atomic hydrogen at 21 cm wavelength.

The data are in a datacube of galactic longitude (from -180° to +180° or 0° to 360° in steps of 2° or 5°), galactic latitude (from -30° to +30° in steps of 2°), and radial velocity from -150 to +150 (or -400 to +400) km/s.

The results are shown as:


dataset: glong range:


show: vrad = glong = glat =


Mouse position:



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