NOVELTY - First portion of hydrogen is introduced to vehicle hydrogen storage vessel (21). Second portion of hydrogen is introduced to storage vessel until actual amount of hydrogen introduced to storage vessel corresponds to first calculated amount. Third portion of hydrogen corresponding to second calculated amount is introduced to storage vessel to substantially fill storage vessel with hydrogen.    USE - For filling hydrogen fuel to hydrogen storage vessel of hydrogen fueled vehicle.    ADVANTAGE - Reduces potential for underfilling of the vehicle hydrogen storage vessel. Ensures fast filling of vehicle hydrogen storage vessel. Compensates increase of vessel gas temperature during charging. Compensates initial vessel and filling station gas supply conditions.    DETAILED DESCRIPTION - First portion of hydrogen is introduced to the vehicle hydrogen storage vessel after measuring initial gas pressure in the vehicle hydrogen storage vessel. The flow of hydrogen into the vehicle hydrogen storage vessel is interrupted, and first estimate of volume of vehicle hydrogen storage vessel is then made. The first calculated amount of hydrogen required to achieve a predetermined rated fill condition in the vehicle hydrogen storage vessel is determined after first estimate of volume of vehicle hydrogen storage vessel is made. The second calculated amount of hydrogen to be introduced to the vehicle hydrogen storage vessel to achieve a full rated fill condition is determined after second portion of hydrogen is introduced to the vehicle hydrogen storage vessel. An INDEPENDENT CLAIM is also included for a hydrogen gas dispenser system.    DESCRIPTION OF DRAWING(S) - The figure is a schematic diagram showing the hydrogen dispenser control instrumentation and location employed in the method and system for filling hydrogen fuel to vehicle hydrogen storage vessel.    Pressure and temperature transducers (12)    Dispenser (16)    Dispenser mass flow meter (17)    Solenoid fill valve (18)    Vehicle hydrogen storage vessel (21)