he MFR-7 Shadowband Radiometer (MFRSR) measures total, diffuse, and direct irradiance at six wavelengths (415, 500, 615, 673, 870, and 940 nm, each 10 nm FWHM) in the visible/NIR spectrum. The instrument makes measurements simultaneously across the seven channels and is displayed in near-real time updated every 15 minutes. Data are used for atmospheric turbidity measurements. These data may be viewed as Calibrated and Langley plots by accessing the CCNY-YESDAS Web webserver from the link below. Data sets may be downloaded for further use. Historical data files may also be accessed. The time stamp is Eastern Standard Time (EST); Daylight Savings Time does not apply.

Instruments are deployed at remote sites with a marine battery backup, each operating autonomously unattended and requiring little attention or service. Each unit is connected to the internet through a MOXA DE-311 Serial to Ethernet converter installed in each control box located on the site roof and mapped to a data collection computer. Data is downloaded at fifteen minute intervals, converted and incrementally transmitted to a central data server by controlling script files using an automated FTP client from ScriptFTP and also Visual Basic programs which generate command files executed by the computer's System Scheduler.

Overall system design is fault tolerant. Data, in different forms, is stored in three places such that data integrity is not compromised by communication losses or internet interruptions. Files are automatically corrected and restored upon power loss or internet failure, the exception being failures due to the instrument itself, for example, the instrument may be damaged by a lightning strike.