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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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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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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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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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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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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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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After modifying some of the UHD code I finally got a program which reads data from two USRP2s which are synced by a MIMO cable and which stream data via a single Ethernet port. The source code for can be…
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Assume you are CEO of a company that wins the bid to be builder of the European Galileo navigation satellites. Then you are invited to the US embassy, where you have the chance to talk to some officials and you…
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Yesterday our first USRP2 was delivered and I managed to do all the software stuff around it. Today we fixed the problem with one of the resistors to make the DBSRX work with the main board. One has to remove…
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