Next: Basic widget procedures Up: Introduction Previous: Orbital phases in spectroscopy Contents
As any interferometer, even those with spectrometers, measure the
visibilities integrated over band passes of non-negligible widths,
computes model visibilities on a grid of wavelengths. The results
(visibilities, fluxes) are then integrated over wavelength, whereby
special attention needs to be payed to the averaging corresponding to
what the instrument actually does.
The grid chosen is usually appropriate for the selected interferometer; if the spectral resolution is high, the grid wavelengths correspond exactly to the channel center wavelengths. The choice of grid is made in function calcmodel, for each spectrometer.
Finally, the photometric field of view is also computed based on the diameters of the telescopes and the seeing during the observation. The seeing values are stored in scans.r0 and default to 1".