a GPS receiver to the GeoSCOUT, data collected from the ACS-430 can be georeferenced and stored for later analysis in third party GIS software. The Crop Circle ACS-430 active crop canopy sensor provides classic vegetative index data as well as basic reflectance information from plant canopies and soil. Unlike passive radiometric light sensors, the Crop Circle ACS-430 is not limited by ambient lighting conditions— measurements can be made day or night due to its unique, light source technology. For on-the-go applications, the Crop Circle ACS-430 sensor can be mounted to virtually any type of vehicle to remotely sense and/or map plant or crop canopy biomass while driving through a field. The compact size and low weight design allows Crop Circle to be easily adapted to pole-mounted and handheld applications. Information produced by the sensor can be utilized to quantify the impact of nutrients, water, disease or other growing conditions on plants or crops. MULTI-CHANNEL SPECTRAL MEASUREMENT The ACS-430 incorporates three optical measurement channels. The sensor simultaneously measures crop /soil reflectance at 670 nm, 730 nm and 780 nm. A unique feature of the ACS- 430 sensor, unlike any other active sensor on the market, is its ability to make height independent spectral reflectance measurements. Holland Scientific refers to these reflectance measurements as Pseudo Solar Reflectance (PSR). This means the spectral reflectance bands are scaled as percentages and will not vary with sensor height above a target. This opens the possibility of using literally dozens of vegetative indices that do not use ratio based calculations. COLLECT DATA EASILY Using the Holland Scientific GeoSCOUT GLS-400 datalogger, data can be easily and quickly recorded to a text file on an SD flash card. Additionally, by connecting FEATURES: » 3 measurement channels: 670nm, 730nm and 780 nm » Computes height independent absolute reflectances » Make measurements day or night » Measurements not influenced by fluorescent or other AC light sources » Wide measurement range— 0.25 m to 2.0 m » Rugged IP68 packaging— dust and water resistant » Low noise performance » Fast data output rate » Light weight < 0.43kg
