t_intvl = 86400  # interval of time stamp (for day==>86400, hour==>1440, second==>1)
x_limit = 1000   # outlier limit
Twgt_N  = 10     # sample numbers required for the ADEV (for weighting)
wgt_lmt = 0.4    # maximum weight limit (larger than 1/(available clocks for averaging), smaller than 1)
