Case Studies
Ozone-Profiling Lidar System
The customer is designing an ozone-profiling lidar system for measuring the concentration of ozone from ground level up to about 4 kilometer (km) altitude. The system operates in the ultraviolet range and uses multiple receiver telescopes to cover the range.
The dynamic range of the signal is enormous, so small aperture telescopes are used to collect backscattered light from low altitudes and large ones are used to collect backscattered light from high altitudes. The customer is operating simultaneously at three laser wavelengths, and the current design requires a total of nine photodetectors (three telescopes with two detectors each, and a larger fourth telescope with three detectors).
The laser will be pulsed at 10 to 20 Hz. They will sample nominally at 10 MHz to track the laser pulse as it climbs up through the atmosphere, which will provide a vertical resolution of 15 meters. An altitude of 4 km will require 267 samples at this resolution. The customer will average approximately 1000 pulses worth of data together in order to beat down noise to a manageable level. No data processing is done during the averaging.
GAGE'S SOLUTION
A high resolution digitizer with 50 MHz bandwidth. Using Gage's software development kits, the customer can create custom programs to achieve required results.
PRODUCT RECOMMENDED
CompuScope 1450-1M
Instrument Mainframe 2020A
Gage SDK Pack on CD
This application note is provided "as is" without any warranties of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. Gage Applied Technologies further does not warrant the accuracy and completeness of the material contained herein. Gage Applied Technologies may make changes to this material, or to the products described in it, at any time without notice.
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