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;[[Dual polarization fields in the 14 August 2008 hailstorm]] | ;[[Dual polarization fields in the 14 August 2008 hailstorm]] | ||
:A damaging hailstorm took place just north of the city of Fort Collins on 14 August 2008. This article describes the | :A damaging hailstorm took place just north of the city of Fort Collins on 14 August 2008. This article describes the <math>Z_{DR}</math>, <math>LDR</math>, and <math>H_{DR}<math> dual polarization data fields that were observed in a low elevation angle PPI sweep through the hailstorm. | ||
;[[Negative Kdp observations in the upper portion of a thunderstorm on 20 June 2008]] | ;[[Negative Kdp observations in the upper portion of a thunderstorm on 20 June 2008]] | ||
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;[[Antenna Pattern Evaluation]] | ;[[Antenna Pattern Evaluation]] | ||
:A 9-meter dual-offset Gregorian antenna was installed in the spring of 2008 at the CSU-CHILL radar facility to upgrade the performance from the center-fed parabolic reflector previously used at the facility. The new antenna design has several advantages over the old antenna, primarily eliminating beam blockage by using an offset-feed structure and reducing cross-polarization with a dual-reflector design. The antenna pattern was measured in the summer of 2008 by REU student Michael Wood, the results of which are presented in this article. | :A 9-meter dual-offset Gregorian antenna was installed in the spring of 2008 at the CSU-CHILL radar facility to upgrade the performance from the center-fed parabolic reflector previously used at the facility. The new antenna design has several advantages over the old antenna, primarily eliminating beam blockage by using an offset-feed structure and reducing cross-polarization with a dual-reflector design. The antenna pattern was measured in the summer of 2008 by REU student Michael Wood, the results of which are presented in this article. | ||
'''[[:Category:Featured Articles|More Featured Articles]]''' | '''[[:Category:Featured Articles|More Featured Articles]]''' | ||
Revision as of 01:26, 1 February 2009
Featured Articles
These are examples of CSU-CHILL data selected from meteorologically interesting cases. The data plots generally have had some basic level of post-processing applied (i.e., calculations of derived fields, utilization of specialized base maps, etc.)
- Dual polarization fields in the 14 August 2008 hailstorm
- A damaging hailstorm took place just north of the city of Fort Collins on 14 August 2008. This article describes the , , and <math>H_{DR}<math> dual polarization data fields that were observed in a low elevation angle PPI sweep through the hailstorm.
- Negative Kdp observations in the upper portion of a thunderstorm on 20 June 2008
- Dual-Doppler scans of a severe thunderstorm were made by the CSU-CHILL and Pawnee radars on 20 June 2008. This article presents selected plots of the synthesized wind and specific propagation differential phase (Kdp) fields.
- Polarimetric fields in a developing cumulonimbus (CB) cloud on 10 August 2008
- RHI scans were made through a thunderstorm that was developing near the CSU-CHILL radar site on 10 August 2008. This article presents the Zdr and Ldr fields observed in this CB.
- Hailstorm observation of 20 June 2008
- During continuing testing of the dual offset feed antenna, various scans through severe thunderstorm echoes were conducted on 20 June 2008. One hail-producing storm passed within 20 km of the CSU-CHILL radar site. This article presents some of the polarimetric data fields observed in this storm at low elevation angles.
- Antenna Pattern Evaluation
- A 9-meter dual-offset Gregorian antenna was installed in the spring of 2008 at the CSU-CHILL radar facility to upgrade the performance from the center-fed parabolic reflector previously used at the facility. The new antenna design has several advantages over the old antenna, primarily eliminating beam blockage by using an offset-feed structure and reducing cross-polarization with a dual-reflector design. The antenna pattern was measured in the summer of 2008 by REU student Michael Wood, the results of which are presented in this article.
Technical Notes
These articles deal with engineering topics of interest to users of CSU-CHILL data.
- Clock Generator User's Guide (TN-007)
- User's Guide to the programmable clock-generator design developed at CSU-CHILL.
- Frequency Synthesizer User's Guide (TN-006)
- User's Guide to the programmable Frequency Synthesizer design developed at CSU-CHILL.
- Radar Echoes from Wind Turbines (TN-004)
- Wind Turbines have become increasingly common in recent years. Their Doppler spectral characteristics are presented, along with an animation showing the repetitive patterns present in the turbine spectra. An audio presentation of the same data is also available, clearly showing the temporal variation of the echo. A brief discussion on the effects of wind turbine proliferation on radar meteorology is also presented.
- Coherent Leakage (TN-003)
- This is a short discussion on coherent leakage, discussing the various causes of coherent leakage in weather radar receivers. Some troubleshooting tips are also provided.
Recent Observations
- 20071211 Pawnee + KCYS test dual Doppler operations
- 20070423 Polarimetric Observations of a Mesocyclone
More Recent Observations articles
Ongoing Data Analysis
More Ongoing Data Analysis articles
Casebook
The CSU-CHILL Casebook contains summaries of CHILL operations, categorized by keywords, project names and by date of operation.
