Mopra Sensitivity Calculator: On the Fly

Observed Line (v=0):   or Observing frequency:  MHz
Correlator Configuration:
Weather conditions:good    average    poor;  or specific Tsys:  K
Map size: arcmin
Number of maps:  OR  Sensitivity to be achieved in a channel and pixel 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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Map Size

The size of the OTF map in arcminutes. At this stage only square maps are supported. Typically the size of a map is 2-5 arcmin. Note that a pointing correction is needed about every 1.5 hours, the a map should be finished in that time frame which is the case is the size is 5 arcmin or less.

Example: 5

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Number of Maps

The number of coverages (maps) for the observed region. Alternatively, you can provide the sensitivity to be achieved in a channel and the number of maps needed to reach that limit will be calculated. Example: 2

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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)