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Table 1:

Examples for parameters of an optimum timing in an OTF map covering 30 points in each line. All values are given for a spectral resolution of 1 MHz, corresponding to a typical fluctuation bandwidth of 1.5 MHz.

$t_{\rm A}$ $\alpha $ N $t_{\rm s}$ $\sigma/\sigma(t_{\rm tot})$ $\sigma^2_{\rm drift}/\sigma^2_{\rm radio}$
  [s]     [s]    
Ground-based telescope: $t_{s,{\rm min}}=1$ s, $t_{\rm d,1}+t_{\rm d,2}=20$ s, $t_{\rm turn}=8$ s
spectroscopic 80 2.5 180 2 1.17 0.07
total-power 8 1.5 60 1 1.70 0.70
HIFI at Herschel: $t_{s,{\min}}=1$ s, $t_{\rm d,1}+t_{\rm d,2}=80$ s, $t_{\rm turn}=20$ s
spectroscopic 150 2.5 180 4 1.23 0.10
total-power 10 1.5 150 1 2.13 1.03

Source LaTeX | All tables | In the text

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