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Optical Sensors for Planetary Radiant Energy (OSPREy): Calibration and Validation of Current and Next-Generation NASA Missions
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hooker, Stanford B. Bernhard, G. H. Morrow, John Howard Booth, Charles Rocky Comer, Thomas P. Lind, Randall N. Quang, Vi V. |
| Copyright Year | 2012 |
| Abstract | AbstractThe primary objective of the OSPREy activity is to develop and deploy a new class of commercial radiometersto support existing and next-generation NASA ocean color satellites. An EPIC sensor is a hybridspectral devicecombining measurements of spectral irradiance and radiance from recently developed microradiometers with acommercially available hyperspectral spectrograph plus a pointing system. Over common parts of the spectrum,fixed-wavelength microradiometers and the spectrograph can be continuously intracompared to maintain sta-bility and accuracy of the system. Radiance sensors have a nine-position filter-wheel assembly in line with thespectrograph fiber optics to permit hyperspectral polarimetric measurements (three polarized filters), direct-Sunviewing (neutral density filters), stray-light correction (395nm cut-on filter), and dark current measurements(opaquedisk). RadiancesensorsalsohaveanintegratedcameraforlocatingtheSunandMoon(inlieuofaquad-rant detector), as well as verifying the condition of all targets (cloud-free solar and lunar disks, cloud presencein sky data, and sea surface debris or foam detection). All sensors include thermal stability control to increasefilter and detector stability and reduce drift. The field sensor suite includes shadowband accessories to the solarirradiance sensors, which are combined with radiance observations of the Sun, Moon, sea, and sky across a widespectral range—the UV, through the visible (VIS) and into the short-wave infrared (SWIR); 305–1,640nm is thefull spectral range for radiance, as well as irradiance because of a new cosine collector design. The diversity oftargets and measurement types provides an unprecedented number of near-simultaneous atmospheric and oce-anic data products. This new sampling capability is expected to improve a) the atmospheric correction of oceancolor data; b) the accuracy in satellite data products, particularly in optically complex (coastal) waters; and c)the understanding of the interaction between the ocean and atmosphere. The combination of wide spectral anddynamic ranges with accurate pointing are also anticipated to have application to terrestrial observations. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20130003503.pdf |
| Alternate Webpage(s) | http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20130003503.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
