end_varid, <span class="string">'long_name'</span>, <span class="string">'particle freeze time'</span>);
0100 netcdf.putAtt(nc, tend_varid, <span class="string">'units'</span>, <span class="string">'days since 1858-11-17 00:00:00'</span>);
0101 netcdf.putAtt(nc, tend_varid, <span class="string">'format'</span>, <span class="string">'modified julian day (MJD)'</span>);
0102 netcdf.putAtt(nc, tend_varid, <span class="string">'time_zone'</span>, <span class="string">'UTC'</span>);
0103 
0104 group_varid = netd