Abstract: Abstract：Thermal Propellant Gauging System (PGS) method is a kind of new method to measure the amount of remaining propellant It is convenient to carry out and has high measurement precision, which is suitable for the measurement at EndOfLife (EOL). A large number of ground tests on a type of tank are needed to verify the feasibility and accuracy of PGS and give suggestion for its application onorbit. The data are collected through the tests of different filling quantity of test liquid under different heating conditions. According to the data analysis , the measurement precision is obtained . The good performance of PGS is showed. And the suggestion of application is presented. The profile is of reference value in the application of PGS onorbit．  

Key words: Keywords：thermal propellant gauging system (PGS) method, propellant gauging, ground test