Mobile Lightbar Unit
Lampinen, B. D., Udompetaikul, V., Browne, G. T., Metcalf, S. G., Stewart, W. L., Contador, L., Negron, C., and Upadhyaya, S. K. 2012. A Mobile Platform for Measuring Canopy Photosynthetically Active Radiation Interception in Orchard Systems. Horttechnology 22: 237-244.
The links below contain two time laps videos showing the change in light interception throughout the day for both north south and east west almond plantings.
Colusa Co. almond North South orientation