Articles
From CSU-CHILL
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.)
- An example of reflectivity-based rain rate over-estimation due to ice hydrometeor contamination on 18 August 2009
- Thunderstorm precipitation with reflectivity levels of 45 - 50 dBZ and specific propagation differential phase values of ~0.5 deg / km was observed over the Denver area. Plots demonstrationg the resultant differences between the rain rate estimates calculated from the reflectivity and Kdp data are shown.
- Macroburst radial velocity pattern on 23 July 2009
- A divergent radial velocity pattern was observed in a low elevation PPI scan through a thunderstorm precipitation shaft on 23 July 2009.
- High rain rates at Denver International Airport on 23 June 2009
- The CSU-CHILL radar detected large specific differential propagation phase (Kdp) values over Denver International Airport while heavy rain was being observed there on 23 June 2009.
- Melting hail signatures on 8 July 2008
- Dual polarization patterns associated with melting hail are shown in an RHI scan through the lower portion of a thunderstorm precipitation shaft.
- Selected images from the 26 March 2009 blizzard
- Real time radar display images are manually posted here
- Boundary layer roll echoes observed on 22 July 2008
- This article presents PPI and RHI scan observations of boundary layer roll echoes observed on a warm summer afternoon.
- 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 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 () 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 and 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.
Technical Notes
These articles deal with engineering topics of interest to users of CSU-CHILL data.
- X-band Solid State Transmitter Monitor User's Guide (TN-008)
- User's Guide to the solid-state X-band transmitter monitor developed at CSU-CHILL.
- 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.
