Visible Langley Measured Irradiance
Langley calibrated visible irradiance is the spectral irradiance in Watts per square meter per nanometer measured by a visible MFRSR that has been calibrated using the Langley method. This method extrapolates the measured direct beam to zero air mass where the incident irradiance is equal to the extra-terrestrial value.
Graphs of the data are available for a time selection of a month or less. The graphs will be displayed along with a tabular view of the data used to create the graph. We also provide a feature to export the data to a file on your local computer in a comma delimited(CSV) format.
For any time duration greater than a month, use the end date option below. This will generate a data file that you can download to your local computer. Keep in mind a year's worth of data is about 25 megabytes, and will take almost 2 minutes to generate.
Graphs of the data are available for a time selection of a month or less. The graphs will be displayed along with a tabular view of the data used to create the graph. We also provide a feature to export the data to a file on your local computer in a comma delimited(CSV) format.
For any time duration greater than a month, use the end date option below. This will generate a data file that you can download to your local computer. Keep in mind a year's worth of data is about 25 megabytes, and will take almost 2 minutes to generate.