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Debugging in the sleep

Yesterday I was trying to find a bug in my source code which lead to quite unexpected results. I thought that I narrowed down the possible origin and will be able to localize the problem within a short time. However,

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Posted in computer, GPS, math, physics, programming

Horizontal positional accuracy of Google Maps

This week I was involved in a discussion about the accuracy of Google Maps. It seemed that the position derived from a geodetic GPS receiver matched well with the visual location inside the Google Maps image, having a residual horizontal

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Posted in computer, GPS

Sequestration and what it means for space research

U.S. president Obama was required by law to issue a sequestration order which cancels about 85 billion USD in budgetary resources across the federal government for the remainder of the fiscal year 2013. Of course there are still plans to

Posted in GPS, math, physics

Two-line elements of current GLONASS satellites

The Celestrak page provides a variety of two-line elements (TLE) for different satellites, including orbit information for navigation satellite systems like the Russian GLONASS. Unfortunately, there are more satellites listed in the TLE data-set than are currently operational. E.g. today

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Posted in computer, GPS, programming

Sailing against the wind – or how Japan invests in its future

In times of budget cuts, efforts to save public spending and provision of funds for re-construction and clean-up after this year’s Earthquake, tsunami and nuclear accident, Japan seems to do the right thing and invest into its future. As this

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Posted in GPS, Japanese

GPS satellites in view – the more the better?

This post will be a little bit longer as the usual ones, as it deals with some thoughts which I had when playing with GPS orbits. Assuming that you want to estimate the position by means of GPS it is

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Posted in GPS, math

How wireless broadband could effect costs and safety of air traffic

In order to provide wireless broadband across the US LightSquared proposed to the Federal Communication Commission (FCC) to build a national network of up to 40,000 high-power terrestrial base stations that would transmit in the 1525-1559 MHz band, which is

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Posted in GPS

Karhunen-Loève Transform – an interesting alternative to FFT and wavelets

Today I stumbled over this interesting paper which describes the usage of the Karhunen-Loève Transform (KLT) for (weak) signal detection in time-series. Although there are many similarities with wavelet analysis, the KLT seems to be less computationally demanding (but its

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Posted in computer, GPS, math, paper, programming

Programming AMD GPUs

I am now writing code for NVIDIA GPUs based on CUDA for almost three years. Every two or three months I am thinking to purchase an ATI card and compare its performance to one of the latest NVIDIA cards (e.g.

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Posted in computer, GPS, math, programming

Some extra costs for Galileo – is it worth? YES!!!

Several European Union commissions have estimated that completing a fully operational capability (FOC), 30-satellite Galileo system and the European Geostationary Navigation Overlay Service (EGNOS) will cost an additional €1.9 billion above the €3.4 billion already allocated. OK, that’s quite a

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Posted in GPS
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