A system using a non-linear multi-swept sine wave system is described which employs a multi-channel, multi-swept orthogonal waves, to separate channels and make multiple, simultaneous online/offline CO2 measurements. An analytic expression and systematic method for determining the orthogonal frequencies for the unswept, linear swept and non-linear swept cases is presented. It is shown that one may reduce sidelobes of the autocorrelation function while preserving cross channel orthogonality, for thin cloud rejection.
- Pub Date:
- May 2013
- Physics - Atmospheric and Oceanic Physics;
- Astrophysics - Instrumentation and Methods for Astrophysics
- 22 pages, 11 figures. Submitted to Applied Optics on 03/06/2013