numberOfChannelsInCube
Return to directory of Todd's CASA extensions
Returns the number of channels in a CASA or FITS image cube. The frequency axis must be the 3rd or 4th axis.
See also
findChannel.
Usage:
au.numberOfChannelsInCube(img, returnFreqs=False, returnChannelWidth=False)
Inputs:
- returnFreqs: if True, then return the frequency of the first and last channel, in Hz
- returnChannelWidth: if True, then return the channel width, in Hz
Examples:
CASA <2>: au.numberOfChannelsInCube('g14.63_KDnh3_11.hline.image.convl')
*** reffreqtype in get before
*** reffreqtype in get LSRK
Out[2]: 175
CASA <15>: au.numberOfChannelsInCube('HLTau_CO1_0.tap200klR0.5_0.25kms_ms_flgbig.image',returnFreqs=True)
*** reffreqtype in get before
*** reffreqtype in get LSRK
Channel 0 = 115273507020 Hz
Channel 135 = 115260530032 Hz
Out[15]: (136, 115273507019.99998, 115260530032.43475)
--
ToddHunter - 2014-06-26