Image comparison from two cloud cover sensor in infrared and visible spectral regions

The Total Sky Imager (TSI) and The Cloud Infrared Radiometer (CIR-7) are two cloud cover measuring instruments. TSI uses a CCD camera and provide sky images in the visible spectral range, CIR-7 consists of 7 infrared pyrometer sensors working in the window region 9-14 microns. We will present a comparison of images obtained with both instruments and suggest further investigation possibilities.