Concept information
Preferred term
USIM
Definition
- USIM, or Underwater Spectral Irradiance Meter, is used in the study of the photosynthetic rate of phyto-plankton and to measure the quantity of radiant light energy available for photosynthesis, specifically direct measurements of the subsurface radiation. This instrument was designed to measure the total amount of light falling at a fixed point in the sea over a period of time. References: Draper, L., 1961, Self-contained integrating irradiance meter for use underwater. Journal of Scientific Instruments. 38, 474-476. Group: Instrument_Details Entry_ID: USIM Group: Instrument_Identification Instrument_Category: In Situ/Laboratory Instruments Instrument_Class: Photon/Optical Detectors Short_Name: USIM Long_Name: Underwater Spectral Irradiance Meter End_Group Online_Resource: http://www.iop.org/EJ/article/0950-7671/38/12/307/siv38i12p474.pdf?request-id=be9c3e08-86e5-4f2f-8751-e2d9cfe3831e Creation_Date: 2008-07-18 End_Group (en)
Broader concept
URI
https://gcmd.earthdata.nasa.gov/kms/concept/4feec751-591b-4735-a8ca-e49a15dda0c4
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