... EMIR¹

see http://www.iram.es/IRAMES/mainWiki/EmirforAstronomers

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... set²

SIGMA is usually set by the command BASE.

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... channels''³

in this case the resolution is set to 1 channel per channel

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... is⁴

This is verified by numerical simulations on spectra with known (simulated) rms noise.

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...$0$⁵

$f(i_{\ensuremath{\mathrm{chan}}}) = f_{\ensuremath{\mathrm{res}}} \times (i_{\... ...\mathrm{chan}}}-r_{\ensuremath{\mathrm{chan}}}) + f_{\ensuremath{\mathrm{off}}}$ which, at $i_{\ensuremath{\mathrm{chan}}} = 0$, can be written $x_{\ensuremath{\mathrm{val}}} = f_{\ensuremath{\mathrm{res}}} \times (0 -r_{\ensuremath{\mathrm{chan}}}) + f_{\ensuremath{\mathrm{off}}}$

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... ⁶

even if $v_{\ensuremath{\mathrm{off}}}$ is always null in CLASS, the algorithm is as generic as possible.

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...eq:time)⁷

User is free is redefine at its convenience the header sections by using e.g. SET VAR SPECTRO WRITE

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