restToTopo
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Uses the CASA measures tool to convert a rest frequency, LSRK velocity, and observing date/direction
to the corresponding frequency in the TOPO frame. See also
topoToRest,
topoToLSRK and
restToLSRK.
Usage:
au.restToTopo(restFrequency, velocityLSRK, datestring, ra, dec, equinox='J2000', observatory='ALMA', veltype='radio', verbose=False)
Inputs:
- restFrequency: floating point value in Hz or GHz, or a string with units
- velocityLSRK: floating point value in km/s
- datestring: "YYYY/MM/DD/HH:MM:SS"
- ra: string "HH:MM:SS.SSSS"
- dec: string "DD.MM.SS.SSSS" or "DD:MM:SS.SSSS" (colons will be replaced with .)
- prec: only used to display the value when verbose=True
Returns: the TOPO frequency in Hz
Example:
CASA <2>: au.restToTopo(230.538, -7, '2015/10/10/10:12:00',ra='05:35:20',dec='-05:00:20')
Warning: replacing colons with decimals in the dec field.
Out[2]: 230547826787.1521
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ToddHunter - 2016-05-11