CLOCK operation

The CLOCK operation produces time-dependent clock delays for the remote stations only. The delays arising from the clock drift are modeled as sinusoidal oscillations with random distributed parameters.

Parameters

The following parameters are available for this operation:

h5parmFilename

This parameter is a string (default is corruptions.h5) that sets the filename of input/output h5parm file.

seed

This parameter is an integer (default is 0) that sets the seed for random number generation. Use for reproducibility. The default value of seed = 0 means that a random seed is used.

mode

Should the clock error be simulated for LOFAR1 or LOFAR2.0? for mode='lofar1', the CS will have a shared clock. For mode='lofar2', each station will have an independent but much smaller clock offset. This selection also changes the default values. The default is mode='lofar1'.

clockAmp

This parameter is a float (default is ``7e-10``(lofar1) respectively ``8.25e-11``(lofar2)) that sets the standard deviation for the clock drift amplitude in s.

clockOffset

This parameter is a float (default is 2e-8 respectively 1.17e-10) that sets the standard deviation for the clock offset in s.

clockOmega

This parameter is a float (default is 1.) that controls the frequency of the clock drift oscillations.