FGS Instrument Handbook for Cycle 24 . help@stsci.edu . Fine Guidance Sensor Instrument Handbook for Cycle 24 > Acknowledgments . Acknowledgments . The contact person for the STScI FGS Program is Ed Nelan ( nelan@stsci.edu ). Many dedicated colleagues have contributed time and expertise to the STScI FGS Astrometry Program over so many years. (and in fact, were the FGS Astrometry Program). ... We thank Alain Fresneau for establishing the astrometry program at STScI. ...