by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English
|Other titles||Standardization work for the calibration of intensities of celestial objects.|
|Statement||Arlo U. Landolt.|
|Series||NASA contractor report -- NASA CR-192831.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
Abstract Observations of celestial phenomena need to be calibrated, to be related, to some measurable quantity. There continues to be a long-term need for accurate photometric standard stars, those with known intensities and colors, so that brightness and color measurements made of various celestial phenomena by different observers can be integrated and compared with . This study encompasses nearly celestial sources over a wide range of intensity and temperature. The results provide an independent statistical verification of the DIRBE point source calibration. The official COBE/DIRBE calibration is based on a single celestial source . In practice, however, transferring the calibration from these laboratory standards to astronomical objects of interest is far from trivial – the transfer must reach outside the atmosphere, extend over 4π steradian of sky, cover a wide range of wavelengths, and span an enormous dynamic range in intensity. SIM L-K3 Final Report Page 6 of 42 5 Measurement methods and instruments used by the participants A wide variety of instruments and techniques were used to make measurements.
SAR Image Scaling, Dynamic Range, Radiometric Calibration, and Display Technical Report (PDF Available) March with Reads How we measure 'reads'. We report the results of a comparative study of the COsmic Background Explorer/Diffuse InfraRed Background Experiment (COBE/DIRBE) photometric calibration over about selected stellar and non. Standardization is very similar to calibration - identical, up to a point - but does not include an estimation of measurement uncertainty. Simply put, standardization is steps 1 through 3 above. Standardizations can be easily performed by most testing laboratories because the step for estimating measurement uncertainty is not required. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.
Located in Chatsworth, CA, Micro Quality offers exceptional primary standard and physical dimensional calibration services. Learn more at http://microquality. - CRC Press Book Post-Launch Calibration of Satellite Sensors: Proceedings of the International Workshop on Radiometric and Geometric Calibration, December , Mississippi, USA. Increasingly, in the field of earth observation imagery, there is a need for image quality to be assessable in traceable Standard International Units (SIU), and for. calibration is inadequate to ensure accuracy, a shorter interval must be established. "(C)ertified equipment having a known, valid relationship" means that the calibration house must have its own equipment certified. In the U.S., "nationally recognized standards" implies the National Institute of Standards and. For the purpose of calibration, the sensor was placed in open space facing the sky and the channel values of the sensor module for different light intensities starting from 1 to klx were measured. The actual light intensities were also measured simultaneously (in the same position) using the standard light by: 3.