Introduction
The document discusses the measurement of aerosol properties and the solar spectrum, emphasizing the importance of understanding atmospheric aerosols for climate change prediction and weather forecasting. Aerosols, such as water vapor and suspended particles, absorb and scatter solar radiation, influencing cloud formation and atmospheric chemical reactions.

Specifications
The POM-01 Sky Radiometer and PGS-100 Sun Photometer are key instruments for measuring solar radiation. The POM-01 uses a silicon photo-diode detector and a rotating filter wheel to measure radiation in seven narrow wavebands from 315 nm to 1020 nm. It includes a sun tracker and a precipitation sensor to protect the optics. The PGS-100 measures the continuous spectrum of direct solar radiation from 350 nm to 1050 nm using a solid-state spectrometer with a CCD detector array.

Procedures
Both instruments require connection to a computer running Windows™ operating software for data acquisition and storage. The software allows for user selection of scanning modes and scheduling, but does not include post-processing capabilities.

Applications
The POM and PGS instruments are designed for long-term, reliable operation in various environmental conditions. They are used globally for meteorology, climatology, atmospheric chemistry, and pollution studies. The POM is part of the Asia-Pacific SKYNET network for aerosol monitoring, while the PGS-100 is used in photovoltaic solar energy research.

Maintenance and Operation
Maintenance for both instruments is minimal, involving regular cleaning of optical windows and checking desiccants. The PGS-100 requires mounting on an automatic sun tracker for accurate measurements.

Technical Specifications
The POM-01 and POM-02 have different waveband ranges, with the POM-02 extending to 2200 nm and including additional UV channels. Both instruments have options for operation in extreme temperatures and dust protection systems. The PGS-100 requires a sun tracker with a pointing accuracy of 0.2° or better.

Conclusion
The document provides detailed specifications and operational guidelines for the POM-01, POM-02, and PGS-100 instruments, highlighting their importance in aerosol and solar radiation measurement for scientific research and environmental monitoring.