The 3 IDL save files in this directory are snapshots of the fields at 3 time instances from the rising flux tube simulation case LNT described in Fan (2008, ApJ, 676, 680). The simulated velocity fields are used in Birch et al. (2010, ApJ, 723, L190) to estimate helioseismic travel time perturbations that can be produced due to the flow associated with the rising flux tubes. Below is a description of the data after restored in IDL, using idlsave_018.dat as an example: IDL>restore, 'idlsave_018.dat' IDL> help % At $MAIN$ B1C FLOAT = Array[256, 512, 512]: Br B2C FLOAT = Array[256, 512, 512]: Bth B3C FLOAT = Array[256, 512, 512]: Bph DPRESS FLOAT = Array[256, 512, 512]: pressure change relative to the reference stratification DRHO FLOAT = Array[256, 512, 512]: density change relative to the reference stratification DTEMP FLOAT = Array[256, 512, 512]: temperature change relative to the reference stratification PRESS_JCD FLOAT = Array[256]: reference pressure stratification RHO_JCD FLOAT = Array[256]: reference density stratification TEMP_JCD FLOAT = Array[256]: reference temperature stratification TIME FLOAT = 2.94586e+06: time of the current snapshot V1C FLOAT = Array[256, 512, 512]: Vr V2C FLOAT = Array[256, 512, 512]: Vth V3C FLOAT = Array[256, 512, 512]: Vph X1C FLOAT = Array[256]: r position of grid X2C FLOAT = Array[512]: theta position (in rad) of grid X3C FLOAT = Array[512]: phi position (in rad) of grid All of the above quantities are in CGS units If there are any questions, please contact Yuhong Fan at yfan@ucar.edu