INTERFEROMETRICS INC.

SUSIM was an absolutely calibrated dual dispersion dual spectrometer instrument that measured the solar spectral irradiance from 115 nm to 410 nm from both the Upper Atmosphere Research Satellite and the Space Shuttle Atmospheric Laboratory for Applications and Science (ATLAS) facility. The SUSIM UARS measured the ultraviolet daily spectral irradiance of the Sun at 0.15, 1.1, and 5 nm resolutions from 1991 to 2005.  The instrument calibration was maintained through measurements of 4 stable deuterium lamps and solar measurements by other redundant less frequently used optical channels.  INTERFEROMETRICS provided support for most activities during pre-launch, commissioning, and operational phases.  INTERFEROMETRICS engineers wrote custom operating software to obtain maximum performance from the microprocessors of that era. INTERFEROMETRICS conducted instrument operations during testing and integration phases as well as conducted the scientific measurements while in orbit.  INTERFEROMTRICS programmers designed and implemented the data reduction software that produced the calibrated irradiances. INTERFEROMETRICS led the substantial effort that derived the instrument calibration from the lamp and redundant channel measurements.  Numerous scientific papers were published and presentations of the results were given to international scientific meetings by INTERFEROMETRICS scientists. The SUSIM ATLAS measured the solar UV spectral irradiance during week long periods in 1992, 1993, and 1994.  INTERFEROMETRICS developed instrument software and power supply hardware for SUSIM ATLAS. INTERFEROMETRICS also provided systems engineering management and support for these space shuttle missions.