| タイトル | OCULLAR Next-Generation Research: Ocean Color at Night |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150000760 |
| 著者（英） | Booth, Charles R.; Hooker, Stanford B.; Morrow, John H. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2014-12-01 |
| 言語 | eng |
| 内容記述 | The Ocean Color Underwater Low Light Advanced Radiometer (OCULLAR)Ocean Color at Night project paired a new miniature photomultiplier tube (PMT)microradiometer with an existing silicon photodetector (SiP) microradiometer in order to extend the linear dynamic range of instruments used to measure apparent optical properties (AOPs). The pairing produced the first hybridnamic microradiometermultitector and successfully demonstrated that high-accuracy, high-sensitivity light measurements can be made in normal and very low-light regimes.This demonstration project constructed, characterized, and deployed an irradiance sensor with PMT and SiP microradiometers centered at 490 nm. The miniature and ruggedized PMT that was selected had a form factor compatible with existing instruments built with microradiometers and an expected survivability typical of the thermal and handling environment of oceanic and atmospheric radiometers.The successful pairing of the PMT and SiP microradiometers permitted using the latter to determine when light levels were below a safety threshold before applying high voltage (HV) to the PMT, thereby protecting it from potentially harmful incident light levels. The large overlap in responsivities between the two detectors (about two decades) and the near-linear response of both, allowed the linear 10 decades of useful dynamic range for a SiP microradiometer to be conservatively extended to approximately 14 linear decades for the operationally-paired multitector. |
| NASA分類 | Oceanography |
| レポートNO | GSFC-E-DAA-TN13306 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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