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


Riihimaki L, C Flynn, and A McComiskey. 2020. ARM Shortwave Spectral Radiometry Strategy Review Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-20-003.


Varble A, S Nesbitt, P Salio, E Avila, P Borque, P DeMott, G McFarquhar, S van den Heever, E Zipser, D Gochis, R Houze, M Jensen, P Kollias, S Kreidenweis, R Leung, K Rasmussen, D Romps, and C Williams. 2019. Cloud, Aerosol, and Complex Terrain Interactions (CACTI) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-19-028.

Yang W, A Marshak, and G Wen. 2019. "Cloud edge properties measured by the ARM shortwave spectrometer over ocean and land." Journal of Geophysical Research: Atmospheres, 124(15), doi: 10.1029/2019JD030622.
Research Highlight

Liu J and Z Li. 2019. "Aerosol properties and their influences on low warm clouds during the Two-Column Aerosol Project." Atmospheric Chemistry and Physics, 19(14), 10.5194/acp-19-9515-2019.


Kassianov E, J Monroe, L Riihimaki, C Flynn, E Cromwell, G Hodges, and A McComiskey. 2018. Climatology of aerosol optical depth at mid-continental US site: ground-based observations. In SPIE Remote Sensing, 2018, Berlin, Germany, .

Delgadillo R, K Voss, and P Zuidema. 2018. "Characteristics of Optically Thin Coastal Florida Cumuli Derived From Surface-Based Lidar Measurements." Journal of Geophysical Research: Atmospheres, 123(18), 10.1029/2018JD028867.

Sheesley RJ and CE Moffett. 2018. Characterizing Potential Radiative Forcing on the North Slope of Alaska Field Campaign Report. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-18-016.

Michelsen HA, RP Bambha, and BW LaFranchi. 2018. Arctic Methane, Carbon Aerosols, and Tracers Study Field Campaign Report. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-18-017.

Cristóbal J, J Jiménez-Muñoz, A Prakash, C Mattar, D Skoković, and J Sobrino. 2018. "An Improved Single-Channel Method to Retrieve Land Surface Temperature from the Landsat-8 Thermal Band." Remote Sensing, 10(3), 10.3390/rs10030431.

Wang W, W Gong, F Mao, and Z Pan. 2018. "Physical constraint method to determine optimal overlap factor of Raman lidar." Journal of Optics, 47(1), 10.1007/s12596-017-0427-9.

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