Mopra Sensitivity Calculator: position switching

Observed Line (v=0):   or Observing frequency:  MHz
Correlator Configuration:
Weather conditions:good    average    poor;  or specific Tsys:  K
Integration time (ON+OFF Positions):min OR Sensitivity to be achieved in a channel Ta*: mK    OR   Tmb: mK
Optional Smoothing Range:km/s (if applied, then the above input sensitivities are interpreted to be over the smoothing range)

To refresh the screen using the default entries, press SHIFT and click the 'reload' button of your browser simultaneously.

Observed Line

Select the the spectral line to be observed. The rest frequency of this line will be treated identical to the observing frequency. If the line is not listed, you may enter the observing frequency manually in units of MHz.


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Correlator cofiguration

Select a correlator configuration from the menu.
MPCOR Correlator refers to the Mopra autocorrelator. MOPS refers to the Mopra Spectrometer, the new polyphase digital filterbank.

Example: ac_64_1024_2

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Weather Conditions

The weather conditions of the observations. This is needed to estimate the system temperature. Alternatively you may enter the system temperature of the observations manually.

Example: average

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Integration time (ON+OFF positions) OR Sensitivity to be achieved in a channel

Integration time on the source + time spent on the reference position in minutes. This allows to calculate the sensitivity you can achieve in a given observing slot. Alternatively, you can provide the sensitivity to be achieved in a channel and the integration time needed will be calculated.

Example: 10

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The sensitivity over a large velocity width increases. You may specify a velocity width for smoothing here. If you do so and you coose to achieve a given sensitivity limit, this limit will be interpreted as being over the smoothing range.

Example: 5

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Original: Juergen Ott (21-Jun-2005)
Modified: Juergen Ott (17-Nov-2005)