fix_modify AtC sample_frequency [freq]
 fix_modify AtC sample_frequency 10 
 Specifies a frequency at which fields are computed for the case where time filters are being applied. 
 Must be used with the hardy/field AtC fix ( see fix atc command ) and is only relevant when time filters are being used. 
 
 none 
 1.6.1
 1.6.1