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Browsing Electrical, Electronic and Computer Engineering by Author "Ackermann, Etienne Rudolph"

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An inductive approach to simulating multispectral MODIS surface reflectance time series

Grobler, Trienko Lups; Ackermann, Etienne Rudolph; Van Zyl, A.J.; Olivier, Jan Corne; Kleynhans, Waldo; Salmon, Brian Paxton (Institute of Electrical and Electronics Engineers, 2013-05)

In this paper, a first order MODIS time series simulator, which uses a Colored Simple Harmonic Oscillator, is proposed. The simulated data can be used to augment data sets so that data intensive classification and change ...
Land cover separability analysis of MODIS time series data using a combined simple harmonic oscillator and a mean reverting stochastic process

Grobler, Trienko Lups; Ackermann, Etienne Rudolph; Olivier, Jan Corne; Van Zyl, A.J. (Gusti); Kleynhans, Waldo (Institute of Electrical and Electronics Engineers, 2012-06)

It is proposed that the time series extracted from moderate resolution imaging spectroradiometer satellite data be modeled as a simple harmonic oscillator with additive colored noise. The colored noise is modeled with ...
Nonlinear dynamic systems modeling using Gaussian processes : predicting ionospheric total electron content over South Africa

Ackermann, Etienne Rudolph; De Villiers, Johan Pieter; Cilliers, P.J. (American Geophysical Union (AGU), 2011-10-04)

Two different implementations of Gaussian process (GP) models are proposed to estimate the vertical total electron content (TEC) from dual frequency Global Positioning System (GPS) measurements. The model falseness of ...
Sequential land cover classification

Ackermann, Etienne Rudolph (University of Pretoria, 2011-09-21)

Land cover classification using remotely sensed data is a critical first step in large-scale environmental monitoring, resource management and regional planning. The classification task is made difficult by severe atmospheric ...
Using Page's cumulative sum test on MODIS time series to detect land-cover changes

Grobler, Trienko Lups; Ackermann, Etienne Rudolph; Van Zyl, A.J.; Olivier, Jan Corne; Kleynhans, Waldo; Salmon, Brian Paxton (Institute of Electrical and Electronics Engineers, 2013-03)

Human settlement expansion is one of the most pervasive forms of land cover change in South Africa. The use of Page’s Cumulative Sum Test is proposed as a method to detect new settlement developments in areas that were ...

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Browsing Electrical, Electronic and Computer Engineering by Author "Ackermann, Etienne Rudolph"

Browsing Electrical, Electronic and Computer Engineering by Author "Ackermann, Etienne Rudolph"

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