lib_pcal module

Phase calibration routines.

lib_pcal.accumulate_pcal(acc_pcal, v1pcal, count_acc_pcal)

[Used in one-baseline-per-task mode.]

lib_pcal.accumulate_pcal_all(acc_pcal, pre_pcal, n_bins_pcal, dtype_complex=<class 'complex'>)

Accumulate pcal window (all-baselines-per-task mode).

lib_pcal.adjust_shift_acc_pcal(acc_pcal, F_pcal_fix, bypass_adjust_pcal=0, v=0)

Remove delay shift due to delay model.

acc_pcal

accumulation matrix for the phase calibration signals.

F_pcal_fix

number of samples to roll each of the arrays in acc_pcal.

bypass_adjust_pcal

0 by default.

v

verbose if 1.

acc_pcal_out

acc_pcal with the rolls (circular shift) applied as defined in F_pcal_fix.

TO DO:

Asses error raised from this correction. It should be inside a sample in phase.

Check that corrections are applied to the proper row (F_refs...).

lib_pcal.fr_gcd(a, b)

lib_pcal.get_pcal_ind(freqs, sidebands, fs, f_pcal, o_pcal)

Compute window length for phase calibration and get tone seperation.

freqs : list of float

start frequency for the bands [Hz].

sidebands : list of str

sideband identifier (L/U).

fs : int

sampling frequency [Hz].

f_pcal : int

frequency separation for phase calibration tones [Hz].

o_pcal : int

frequency offset for phase calibration tones [Hz].

n_bins_pcal

number of samples in pcal window.

f_pcal

pcal tone separation [Hz].

Limitations / TO DO:

Currently only LSB, add USB.

Change int for float.

Offset untested.

lib_pcal.normalize_pcal(pcal_fft, count_acc_pcal)

Normalize the FFTs coefficients containing the phase calibration accumulations.

TO DO:

This needs to be corrected.

lib_pcal.reshape_pcal(v1_pcal, n_bins_pcal)

[Used in one-baseline-per-task mode.]

**TO DO:

Remove and merge implementation with all-baslines-per-task.