MA200 toolkit

MA200 toolkit is an Igor based program that reduces noise in filter-based attenuation measurements by miniature Aethalometer （e.g. AE-51 and MA200) using Optimized Noise-Reduction Algorithm (ONA). The original EPA program only works on AE-51 data. This program works on both AE-51 and MA200 data. Virkkula algorithm is also included to deal with the loading effect.

Figure 1 User interface.

ONA+Virkkula correction. The red dots represent raw data points. The blank line represents data after ONA. The blue line represents data with Virkkula correction.

Hagler, G.S.W., Yelverton, T.L.B., Vedantham, R., Hansen, A.D.A., Turner, J.R. (2011) "Post-processing method to reduce noise while preserving high time resolution in Aethalometer real-time black carbon data." Aerosol and Air Quality Research, 11: 539-546. doi: 10.4209/aaqr.2011.05.0055