Instrumentation
The requirements of high spatial and temporal resolution and good signal statistics for middle atmosphere research prescribe Rayleigh lidar systems with high-energy, high repetition lasers, narrow laser beam divergences, narrow laser linewidths, high atmospheric transmittance with strong Rayleigh backscatter properties, large-aperture telescopes with submilliradian field of view, narrow spectral passband, and maximized optical throughput. These factors have been incorporated into the design of the ARCLITE Rayleigh lidar system.
System Layout
![](v1instrth.gif)
Transmitter: Spectra-Physics GCR5-30 Nd:YAG |
Wavelength |
532 nm |
Pulse width |
7 ns |
Pulse repetition rate |
30 Hz |
Pulse energy |
560 mJ |
Average power |
17 W |
Seeded linewidth |
105 MHz |
Beam divergence (X4) |
0.1 mrad |
Receiver: Newtonian Telescope Configuration |
Telescope diameter |
92 cm |
Focal length |
203 cm |
Field of view |
0.5 mrad |
Number of channels |
2 |
1/2 l plate / Polarizer![](../wht_pix.gif)
Filter bandwidth:![](../wht_pix.gif)
Nighttime
Daytime |
l
10 Å
0.8 Å |
Signal Processing:
Photon Counting Data Acquisition System |
Data system |
SR430 |
Maximum count rate |
100 MHz |
Range bin size |
192 m |
Number of range bins |
1024 |
On-line integration |
1 min |
Computer system |
PC 486-33 |
PMTs (2) |
EMI 9863B/100 |
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![](../arclite_home_link.gif)
![](../wht_pix.gif) Data catalogues
![](../wht_pix.gif) Data summary plots
![](../wht_pix.gif) Publications
![](../rayleigh_link.gif)
![](../wht_pix.gif) Instrumentation
![](../wht_pix.gif) Research activities
![](../res_link.gif)
![](../wht_pix.gif)
![](../contact.gif)
Asti Bhatt
SRI International
Phone (650) 859-3424
asti.bhatt@sri.com
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