Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

rwp > Radar Wind ProfilerInstrument Type(s) > Baseline • External • Guest

The radar wind profiler/radio acoustic sounding system (RWP/RASS), available in 915-MHz (for U.S. deployments) and 1290-MHz (for foreign deployments), measures wind profiles and backscattered signal strength between (nominally) 0.1 km and 5 km and virtual temperature profiles between 0.1 km and 2.5 km. However, ARM no longer operates the RASS portion.

The RWP transmits electromagnetic energy into the atmosphere in as many as five directions (four tilted in opposing vertical planes and on vertical) and measures the strength and frequency of backscattered energy. Calculation of the Doppler shift of the returned signal allows calculation of the atmospheric wind profile.


  • Fixed
  • AMF1
  • AMF2
  • AMF3


Dorsey K and D Feldman. 2021. Surface Atmosphere Integrated Field Laboratory. Ed. by Rolanda Jundt, ARM user facility. DOE/SC-ARM-20-016.

Ghate V, M Cadeddu, X Zheng, and E O'Connor. 2021. "Turbulence in The Marine Boundary Layer and Air Motions Below Stratocumulus Clouds at the ARM Eastern North Atlantic Site." Journal of Applied Meteorology and Climatology, , 10.1175/JAMC-D-21-0087.1. ONLINE.
Research Highlight

HENKES A, G Fisch, L Machado, and J Chaboureau. 2021. "Morning boundary layer conditions for shallow to deep convective cloud evolution during the dry season in the central Amazon." Atmospheric Chemistry and Physics, 21(17), 10.5194/acp-21-13207-2021.

Helbig M, T Gerken, E Beamesderfer, D Baldocchi, T Banerjee, S Biraud, W Brown, N Brunsell, E Burakowski, S Burns, B Butterworth, W Chan, K Davis, A Desai, J Fuentes, D Hollinger, N Kljun, M Mauder, K Novick, J Perkins, D Rahn, C Rey-Sanchez, J Santanello, R Scott, B Seyednasrollah, P Stoy, R Sullivan, J de Arellano, S Wharton, C Yi, and A Richardson. 2021. "Integrating continuous atmospheric boundary layer and tower-based flux measurements to advance understanding of land-atmosphere interactions." Agricultural and Forest Meteorology, 307, 108509, 10.1016/j.agrformet.2021.108509.

Wang J and M Zhang. 2021. "A Constrained Data Assimilation Algorithm Based on GSI Hybrid 3D-EnVar and Its Application." Monthly Weather Review, 149(10), 10.1175/MWR-D-21-0052.1.

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