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Parameter values

Table 1: Values of parameters independent of the observing mode.
Parameter Value Unit
\ensuremath{\mathrm{NEFD}} 30 (mJy/beam) $\sqrt{\mbox{s}}$
\ensuremath{d_\ensuremath{\mathrm{cal}}} 1 hr
\ensuremath{t^\ensuremath{\mathrm{}}_\ensuremath{\mathrm{pointing}}} 3 min
\ensuremath{t^\ensuremath{\mathrm{}}_\ensuremath{\mathrm{focus}}} 2 min
\ensuremath{t^\ensuremath{\mathrm{}}_\ensuremath{\mathrm{skydips}}} 5 min
\ensuremath{t^\ensuremath{\mathrm{cal}}_\ensuremath{\mathrm{onoff}}} 4 min
\ensuremath{\eta_\ensuremath{\mathrm{cal}}} 1.5 --
\ensuremath{\epsilon_\ensuremath{\mathrm{tel}}} 1 --
Table 2: Values of used zenith opacities ( \ensuremath{\tau_\ensuremath{\mathrm{zen}}}) as a function of weather conditions for summer and winter.
  Excellent Average Poor
Winter $\le 0.10$ $\le 0.30$ $\le 0.50$
Summer $\le 0.20$ $\le 0.35$ $\le 0.50$


Table 3: User defined values of parameters for the mapping observing mode.
Parameter Default Minimum Maximum Unit
\ensuremath{v_\ensuremath{\mathrm{\Vert}}} 8 4 10 arcsecs$^{-1}$
\ensuremath{\delta} 8 5 24 arcsec
\ensuremath{\Delta^\ensuremath{\mathrm{}}_\ensuremath{\mathrm{throw}}} 60 30 90 arcsec
Table 4: Fixed values of parameters for the mapping observing mode.
Parameter Value Unit
\ensuremath{\Delta^\ensuremath{\mathrm{}}_\ensuremath{\mathrm{base}}} 30 arcsec
\ensuremath{\Delta^\ensuremath{\mathrm{}}_\ensuremath{\mathrm{array}}} 245 arcsec
\ensuremath{n^\ensuremath{\mathrm{max}}_\ensuremath{\mathrm{bol}}} 117 --
\ensuremath{n^\ensuremath{\mathrm{dead}}_\ensuremath{\mathrm{bol}}} 14 --
\ensuremath{d_\ensuremath{\mathrm{submap}}} 1 hr
\ensuremath{d_\ensuremath{\mathrm{scan}}} 1 hr
$\ensuremath{\alpha}(40'')$ 0.4 mJy/beam. $\sqrt{\ensuremath{\mathrm{sec}}}$/arcsec
$\ensuremath{\alpha}(2')$ 1.2 mJy/beam. $\sqrt{\ensuremath{\mathrm{sec}}}$/arcsec

Table 5: Values of parameters for the On-Off observing mode.
Parameter Value Unit
\ensuremath{n_\ensuremath{\mathrm{subscan}}} 20 --
\ensuremath{t^\ensuremath{\mathrm{}}_\ensuremath{\mathrm{subscan}}} 60 sec
\ensuremath{t^\ensuremath{\mathrm{overhead}}_\ensuremath{\mathrm{subscan}}} 4 sec
\ensuremath{t^\ensuremath{\mathrm{overhead}}_\ensuremath{\mathrm{scan}}} 15 sec


next up previous contents
Next: Bibliography Up: IRAM Memo 2010-2 IRAM-30m Previous: Time estimation   Contents
Gildas manager 2014-07-01