... JWST . ... FGS . ... A science instrument known as the Near-InfraRed Imager and Slitless Spectrograph (NIRISS) is packaged with the guide camera ( FGS ), but is functionally independent. ... Preparations for the third cryo-vacuum test (CV3) of the Integrated Science Instrument Module (ISIM) at NASA?s Goddard Space Flight Center continued throughout the summer. ... FGS/NIRISS became the first instrument to be reinstalled in the Integrated Science Instrument Module (ISIM) following the "Half-Time Show...