The NASA Glenn Research Center Principal Investigator Microgravity Services (PIMS) project supports microgravity principal investigators' efforts to evaluate acceleration effects on their experiments. PIMS is funded by the NASA Headquarters Office of Life Sciences and Microgravity Applications, Microgravity Research Division (MRD). PIMS' primary responsibility is to support MRD investigators in the area of
acceleration data analysis and interpretation. Also, PIMS provides MRD with expertise in the area of microgravity experiment requirements, vibration isolation and the implementation of requirements on
different spacecraft.

PIMS is part of the Microgravity Measurement and Analysis Project (MMAP) which integrates the PIMS with five other activities focused on the measurement and analysis of the microgravity environment in support of microgravity science investigators. The Space Acceleration Measurement System (SAMS) and the Orbital Acceleration Research Experiment (OARE) are accelerometer instruments flown on the Shuttle to measure the environment. The SAMS-Mir project uses a SAMS to measure and characterize the microgravity environment of Mir. The SAMS project is developing an accelerometer system to record vibration data on free flying orbiters. The SAMS II project is developing a new accelerometer instrument to support science investigators on the international Space Station.