Spectral analysis on polling data

1. What are the methods of spectral analysis?
2. What is spectral analysis in statistics?
3. What is spectral analysis in remote sensing?

What are the methods of spectral analysis?

Spectral analysis is done based on the nonparametric methods and the parametric methods. Nonparametric methods are based on dividing the time-domain data into segments, applying Fourier transform on each segment, computing the squared-magnitude of the transform, and summing and averaging the transform.

What is spectral analysis in statistics?

Spectral analysis involves the calculation of waves or oscillations in a set of sequenced data. These data may be observed as a function of one or more independent variables such as the three Cartesian spatial coordinates or time. The spatial or temporal observation interval is assumed to be constant.

What is spectral analysis in remote sensing?

Test stand of spectral signature allows to determine NDVI, NDWI, NDII, MSI, LAI indicators and other for determining the health of organic material, water content, content of impurities, etc. Analyses carried out on the basis of images obtained using multisensor platform in several spectral bands.