Optical Radiation Measurement Services Introduction Please give us your feedback on the optical radiation measurement services provided by the National Physical Laboratory. The Earth Observation, Climate and Optical group at NPL are currently formulating a new three-year portfolio of work funded by the National Measurement System. Your responses to the questionnaire will help ensure that the optical radiation measurement services and facilities developed and maintained as part of this work meet the needs of industry, regulators and other key stakeholders. This survey will take approximately 10 minutes to complete. Next