This bracket is used to mount two PAR sensors (Part# S-LIA-M003) and two solar radiation sensors (Part# S-LIB-M003) on the Light Sensor Bracket (Part# M-LBB) for making the measurements needed to calculate the Normalized Difference Vegetation Index (NDVI). NDVI monitoring systems are used to provide ground-based verification of satellite NDVI measurements and to fill in when satellites are not available. NDVI systems are also used to monitor crop health and to estimate yields.