Landsat-8: how not to plan a mission (Part 1: policy)
I was recently reading the 2012 article by James R. Irons and colleagues describing the Landsat-8 mission (or Landsat Data Continuity Mission, LDCM, as it was then called)¹.…
Category: Satellite Imagery
Freeware SAR processing, Part II: PolSARPro
In this post I’ll take you through some simple functions in the freeware polarimetric SAR processing package, PolSARPro. The software is distributed by the European Space Agency (ESA)…
Freeware SAR processing (Part 1.)
One thing about working with synethic aperture radar (SAR) data is that regular image processing functions are often unsuitable. This is because most processes were design to deal…
A great visualization of InSAR data by the ESA – ups and downs at the East African Rift
InSAR (Interferometric Synthetic Aperture Radar) is one of the greatest remote sensing tools for everyone interested in crustal movements. The principle is simple: A satellite equipped with a…
What is the synthetic aperture in “Synthetic Aperture Radar” (SAR)?
Talking to a colleague recently about monitoring changes to the magrove forest of the Rufiji Delta in tanzania, he commented on the relative scarcity of satellite data over…
short announcement: Landsat 8 data available online
Thanks to a post from the mapbox colleagues I’ve found out that new Landsat 8 scenes are already available on EarthExplorer. The data is great!!!
short announce: Reverb @NASA the new WIST
Sorry to talk about this important tool with a little delay. As I was lecturing at the university I was using the Warehouse Inventory Search Tool (WIST) by…
Landsat Data Continuity Mission
Looking Back Most people using GIS or remote sensing data came across the data obtained by the landsat satellite family. It all started with the Landsat 1 mission…
RMSE explained
In my first GIS-course I was presented with the concept of quality measures for a georeferenciation. My lecturer taught me: “There it is: the RMSE or root mean…
unsupervised classification of a Landsat image in R: the whole story or part two
The main question when using remote sensed raster data, as we do, is the question of NaN-treatment. Many R functions are able to use an option like rm.NaN=TRUE…
NDVI / SAVI calculation using Landsat scenes: DNs vs reflectance values
In one of my last seminars relating remote sensing techniques I was blamed for calculationg the NDVI and SAVI directly with the ModelMaker in Erdas Imagine using digital…