Science Driver	Required Measurements	Instrument Requirement	Mission Requirement	Spacecraft Requirement	Comm and Ground Data System Requirement	Mission Operations Requirement	Other Requirement
Space Weather And Climate Modeling	Absolute EUV Flux Measurements	Solar pointing EUVMeasurements Stable Instrument Degradation evaluation	Sun Viewing Above Atmosphere Instrument return	Retrievable carrier			Calibration pre- post- flight
	Total Solar Irradiance	Solar pointing Fast response TSI Radiometer Traceability	Sun Viewing	Retrievable carrier			Calibration pre- post- flight