Focal Plane Imager Plus (FPI+)
Facility class Science Instrument
Principal Investigator: Jürgen Wolf
Deutsches SOFIA Institut (DSI), Stuttgart, Germany
FPI+ was the standard tracking camera for the SOFIA telescope with a 1024x1024 pixel science grade CCD sensor. As a science instrument it was intended to be used as a fast frame-rate imaging photometer in the 360 – 1100 nm wavelength range. The FPI+ CCD had a plate scale of 0.51 arcsec/pixel and a square field of view of 8.7x8.7 arcminutes. Its permanent installation on the SOFIA telescope allowed for its use while any other science instrument was installed on the main Science Instrument flange. Five Sloan Digital Sky Survey filters u', g', r', i', z' and a Schott RG1000 NIR cut on filter were available. A variety of configurable readout modes of the camera allowed for adaptability to the needs of the proposed observations.
"The SOFIA Focal Plane Imager: A Highly Sensitive and Fast Photometer for the Wavelength Range 0.4 to 1 Micron"
Pfuller, Enrico, et al., Journal of Astronomical Instrumentation 2018 07:04.