This program are created to handle the heat pulse data in the% agar-stabilized water to determine the probe spacing. The in-built% function nlinfit are used for fit the PILS and ICPC solution to the data% The ICPC solution are dealt with function 'fasticpc.m' provided by % Dr. Gerard Kluitenberg. The calibration data are provided by Dr. Tusheng% Ren measured at Iowa.