csphot: Cimel Sunphotometer

The Cimel sunphotometer (CSPHOT) is a multi-channel, automatic sun-and-sky scanning radiometer that measures the direct solar irradiance and sky radiance at the Earth’s surface. It takes measurements at predetermined discrete wavelengths in the visible and near-infrared parts of the spectrum to determine atmospheric transmission and scattering properties. The CSPHOT only operates during daylight (sun above horizon).


  • Fixed
  • AMF1
  • AMF2
  • AMF3

Related Publications


Niple ER, HE Scott, JA Conant, SH Jones, FJ Iannarilli, and WE Pereira. 2016. "Application of oxygen A-band equivalent width to disambiguate downwelling radiances for cloud optical depth measurement." Atmospheric Measurement Techniques, 9(9), amt-9-4167-2016, 10.5194/amt-9-4167-2016.


Fielding MD, JC Chiu, RJ Robin, G Feingold, E Eloranta, EJ O'Connor, and MP Cadeddu. 2015. "Joint retrievals of cloud and drizzle in marine boundary layer clouds using ground-based radar, lidar and zenith radiances." Atmospheric Measurement Techniques, 8, doi:10.5194/amt-8-2663-2015.


Yano J and TP Lane. 2014. "Convectively generated gravity waves simulated by NAM-SCA." Journal of Geophysical Research: Atmospheres, 119(15), 10.1002/2013JD021419.

Chiu JC, JA Holmes, RJ Hogan, and EJ O'Connor. 2014. "The interdependence of continental warm cloud properties derived from unexploited solar background signals in ground-based lidar measurements." Atmospheric Chemistry and Physics, 14, doi:10.5194/acp-14-8389-2014.

Mann JA, JC Chiu, RJ Hogan, EJ O'Connor, TS L'Ecuyer, TH Stein, and A Jefferson. 2014. "Aerosol impacts on drizzle properties in warm clouds from ARM Mobile Facility maritime and continental deployments." Journal of Geophysical Research: Atmospheres, 119(7), 10.1002/2013JD021339.

Tomasi C, AA Kokhanovsky, A Lupi, C Ritter, A Smirnov, NT O'Neill, RS Stone, BN Holben, S Nyeki, C Wehrli, A Stohl, M Mazzola, C Lanconelli, V Vitale, K Stebel, V Aaltonen, G de Leeuw, E Rodriguez, AB Herber, VF Radionov, T Zielinski, T Petelski, SM Sakerin, DM Kabanov, Y Xue, L Mei, L Istomina, R Wagener, B McArthur, PS Sobolewski, R Kivi, Y Courcoux, P Larouche, S Broccardo, and SJ Piketh. 2014. "Aerosol remote sensing in polar regions." Earth Science Reviews, 140, doi:10.1016/j.earscirev.2014.11.001. ONLINE.


Yoneyama K, C Zhang, and CN Long. 2013. "Tracking Pulses of the Madden–Julian Oscillation." Bulletin of the American Meteorological Society, 94(12), 10.1175/BAMS-D-12-00157.1.

Yin B and Q Min. 2013. "Climatology of aerosol optical properties at ACRF sites in the tropical warm pool region." Journal of Geophysical Research: Atmospheres, 118(6), 10.1002/jgrd.50234.


Ortega I, S Coburn, E Kassianov, J Barnard, LK Berg, CA Hostetler, JW Hair, RA Ferrare, and RM Volkamer. 2012. 2D-GMAX-DOAS Measurements During TCAP: Comparison with MFRSR, HSRL and Simultaneous Retrievals of Trace Gases and Aerosol Optical Properties. Presented at Fall American Geophysical Union Meeting. San Francisco, CA.

Volkamer R, I Ortega, H Oetjen, R Sinreich, and S Baidar. 2012. Vertical Profile Retrievals of Trace Gases and Aerosol Optical Properties by CU GMAX-DOAS. Presented at 3rd Atmospheric System Research (ASR) Science Team Meeting. Arlington, VA.

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