ATDD has been collaborating with
the NOAA/ARL Solar
Radiation Research Branch (SRRB) in establishing and operating
the national Integrated Solar Irradiance Study (ISIS) network.
The program is comprised of two "levels" of station sophistication:
Level 1 provides basic measurements of incoming radiation only,
while the more complex Level 2 sites focus on the overall surface
radiation balance. The data are collected daily via dialup connection,
checked for quality, and reported to NOAA's
National Climatic Data Center (NCDC) for archival. Data for
the last 30 days are also made available on our Web site.