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HF Propagation Simulation: Influence of TX Power
Here I show some contour plots (circuit reliability) of my simulation results on the 20m band at different times (day & night) using 1 Watt and 99 Watt. The simulation parameters are mentioned elsewhere. …
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HF Propagation Simulation: Variation of Time on all QRP Frequencies
In this post I show some video results of my Voacap simulations for HF propagation: the time has been varied (0-23h). …
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HF Propagation: Variation of the Frequency
In the following post I show some visual results of my Voacap simulations. The visualization has been done using some python and shell scripting. …
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Installation of pythonProp under Debian
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Installation of VOACAP under OSX
Voacap is a tool for “HF Propagation Prediction and Ionospheric Communications Analysis” (1). In the following article I describe the steps to take in order to install the software under OSX. …
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Lazy VOACAP Analysis
If you want to save your time by not installing voacap on your computer, you still can use the online tool for coverage analysis (voacap.com). You can even automate this using a small shell script to build a PDF file with your HF propagation simulation. …
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SDR Software
SDR Software under Linux …
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Clean Up a Time Capsule Sparse Image
Consider you want to remove a bunch of old updates (i.e. of an old Mac) from your Time Capsule (TC). You could erase the whole disk, but usually this is not what you intend to do. Another alternative is to remove the plain sparse bundle containing the old backups. Removing sparse bundles - in particular for >1TB backups - from a TC can be a pain due to the time consumption. This is a result of the approach to split the backup in ~8MB sized directories. …
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Voacap Propagation Simulations
Voacap is a nice tool for simulating the propagation of hf waves: http://www.voacap.com/areapredictions/4f7f7c19ef243/. …
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Xmas Simulations
Here is a bunch of my old Xmas simulations. …