SCAN : raw observation of a source.
Data written in nnnXXXXX.UIC files, with : nnn backend type (sao, nco, fil...) XXXXX SCAN NUMBER UIC TELESCOPE USER ID
A SCAN includes some headers and several CYCLEs.
CYCLE : Includes several PHASEs. A classical observation
in position-switch mode would involve four
- one calibration phase (on source),
- one ON source acquisition phase,
- one calibration phase (off source),
- one OFF source acquisition phase.
Some peculiar telescope setup files may involve
Each PHASE is made of several INTEGRATIONs.
Each INTEGRATION contains 2 to 8 spectra, as the receiver
may observe up to 4 frequencies, 1 to 4 polarization parameters