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Knowledgebase: General ALMA Queries
What bands, frequencies, or wavelength ranges are available?
Posted by Sarah Wood, Last modified by Sarah Wood on 20 February 2020 02:54 PM

Eight observing bands are currently available observations. They are designated bands 3, 4, 5, 6, 7, 8, 9 and 10. The nominal frequency & wavelength ranges are:

 

Band Frequency Range Wavelength Range
  (GHz) (mm)
3 84-116 2.59-3.57
4 125-163 1.84-2.40
5 158 - 211 1.42 - 1.90
6 211-275 1.09-1.42
7 275-373 0.80-1.09
8 385-500 0.6-0.78
9 602-720 0.42-0.5
10 787-950 0.32-0.38

 

These are the nominal frequency ranges for continuum observations. The OT will give validation warnings if a) any part of a spw is closer than 30 MHz to the baseband edge or b) more than half of the spw is within (30 MHz + the line width) of the baseband edge.

For more information on the observing bands, frequencies or wavelength ranges available for science observations, refer to the Technical Handbook

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