Solar Spectral Flux Radiometer (SSFR) ATTREX Science Team Meeting Oct. 23, 2013 NASA ARC/University of Colorado

Zeiss Monolithic Spectrometer VIS-NIR: 256 element silicon diode array nm, 3.0 nm sampling, 8 nm FWHM NIR: 256 element InGaAs array nm, 5.0 nm sampling, 16 nm FWHM 16-bit system NIST traceable calibration Integrating sphere for cosine response

Kipp and Zonen CG4 pyrgeometer Wavelength range: μm Simultaneous zenith and nadir viewing Hemispheric FOV Sampling rate: 1 Hz Measured quantities: Upwelling and downwelling broadband infrared irradiance [W m -2 ]

Solar Spectral Flux Radiometer (SSFR) Since the ATTREX mission in early 2013 SSFR successfully participated in the 2013 SEAC 4 RS mission 20 DC-8 science flights Instrument returned in good shape Post-mission calibration to be performed soon

Solar Spectral Flux Radiometer (SSFR) For the 2014 ATTREX mission Pre-mission Perform SSFR system functional check (mid to late Oct.) Calibrate SSFR (angular, absolute, wavelength) (late Oct. to mid Nov.) Integrate/test on Global Hawk

Solar Spectral Flux Radiometer (SSFR) Since the ATTREX mission in early 2013 requests been made to modify SSFR light collector and CG4 mounting to nadir fairing Currently major undertaking to remove/install fairing to access light collector and CG4 especially for field calibration Reduce risk to AWAS inlet and line mounted to same fairing Fairing removed for SSFR cal