Retro-reflective sensorSRS

Note: Due to a parts shortage, SRS-NDVI sensors are currently unavailable. However, SRS-PRI sensors are still available for purchase. Low cost, weatherproof radiometer The Spectral Reflectance Sensor (SRS) is a matchbox-sized, multiband radiometer that can be mounted on a fence post, tripod, or meteorological tower. It’s inexpensive enough to deploy multiple sensors simultaneously. And it’s rugged enough to leave in the field for an entire growing season, or longer. Deploy for months or even years Most spectrometers are delicate and expensive, making long-term field deployment risky. The SRS is built for long-term exposure to the elements. Encased in a durable Geloy housing with an epoxy fill, it is water tight, weatherproof, with fully sealed optics. These materials and methods have been tested over months and years on other buried and above-ground sensors. Combined, these features help minimize drift in calibration over time. Field ready and radiometrically calibrated Each sensor is radiometrically calibrated to a NIST-traceable standard. Readings are output in units of radiant flux density. Calibration information is stored on board the sensor, so you never have to worry about keeping track of calibration coefficients. Continuously monitor NDVI or PRI at the plot scale NDVI and PRI are calculated from measurements of of electromagnetic radiation reflected from canopy surfaces. They are correlated with canopy variables such as: light use efficiency (LUE), biomass and crop yield, crop and forest phenology, canopy growth, and photosynthetic performance/CO2 uptake. SRS sensors measure incident or reflected radiation in two bands.