RADAR
2001 Multi-Frequency Radar IOP
1 March 2001 - 30 September 2001
Lead Scientist: Stephen Sekelsky
Observatory: sgp, sgp
Scientific hypothesis: A. Measurements from the University of Massachusetts (UMass) Cloud Profiling Radar System (CPRS) - 95/33 GHz Radar indicate that the 95 GHz channel is much less sensitive to insect clutter than the 35 GHz channel by several orders of magnitude. However, a long dataset is needed to quantify insect clutter suppression at W-band for a variety of conditions.
B. Doppler spectrum observations of precipitation have shown how multiple-frequency radar can serve as a very accurate profiling rain gauge. W-band and S-band are an ideal pair of radar bands for this purpose. W-band can accurately measure vertical winds in precipitation, while S-band is non-attenuating. However, a high resolution datset for different precipitation types is not available.
Approach to test hypothesis: A. UMass will operate a 95 GHz cloud radar next to the 35 GHz Millimeter-Wavelength Cloud Radar (MMCR) system throughout the spring and summer of 2001, collecting a seasonal dataset of liquid cloud data.
B. The NOAA Aeronomy Laboratory will deploy an S-band profiler next to the UMass and SGP CART radars in order to collect a long dataset of precipitation Doppler spectra.
Activity Summary
Install UMass and NOAA Aeronomy Laboratory "guest instrument" radars at the SGP CART site adjacent to the MMCR system. Both the UMass and NOAA Aeronomy Laboratory systems will run autonomously for approximately a six month period.
Timeline
Related Publications
2004
Widener KB and JB Mead. 2004. W-Band ARM Cloud Radar - Specifications and Design. In Fourteenth ARM Science Team Meeting Proceedings, Ed. by Denice Carrothers, pp. 1-6. Richland, WA: Department of Energy.
2003
Khandwalla A, SM Sekelsky, and M Quante. 2003. Algorithms for filtering insect echoes from cloud radar measurements. In Proceedings of the 13th Atmospheric Radiation Measurement Science Team Meeting, Ed. by D. Carrothers, Richland, WA: Department of Energy.
2002
Khandwalla A, N Majurec, SM Sekelsky, CR Williams, and KS Gage. 2002. Characterization of Radar Boundary Layer Data Collected During the Muti-Frequency Radar IOP. In Proceedings of the Twelfth ARM Science Team Meeting, Ed. by D. Carrothers, Richland, WA: U.S. Department of Energy.
Majurec N, A Khandwalla, SM Sekelsky, L Li, CR Williams, and KS Gage. 2002. Automated W-Band/S-Band Radar Profilers for the ARM SGP 2001. In Proceedings of the Twelfth ARM Science Team Meeting, Ed. by D. Carrothers, Richland, WA: U.S. Department of Energy.
View All Related Publications
Campaign Data Sets
| IOP Participant | Data Source Name | Final Data |
|---|---|---|
| Stephen Sekelsky | 95 GHz Cloud Profiling Radar System | Order Data |
| Kevin Widener | Dualpol MMCR (35 GHz ARM Millimeter-Wavelength Cloud Radar) | Order Data |
| Christopher Williams | 2.8 GHz NOAA S-band Radar | Order Data |