Shortwave Weather Faxes with the RX320D

desktop-with-rx320-and-fldigi-wx-1

Figure 1: The RX320 software, FLDigi software shown working together. Click to enlarge

So, I’d been trying to obtain weather faxes, of the type transmitted by the shortwave weather transmitters run by the US Coast Guard, and do that by using the little Soft66 Lite SDR board. I’d added a preamp to that line-up in order to improve results, yet it seemed that improvement was needed still. So …

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Figure 1 contains a screenshot that contains an image of a program that has been released under a free software license (FLDigi, located at http://www.w1hkj.com and the license at https://www.w1hkj.com/FldigiHelp-3.21/html/license_page.html). The license is GNU GPL v2. As a derivative work of that program, the part of the screenshot that contains it falls under the same license (GPL2).

Figure 1 also contains elements of a desktop system and associated programs that have been released under a free software license (Copyright: LXDE team: http://lxde.org). As a derivative work of that program, the respective part of the screenshot in Figure 2 falls under that same license. The full text of the licences (GPL 2.0+ and LGPL 2.1+) may be found at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html and http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.  Ten Tec is a subsidiary of Dishtronix, Inc, and trademarked is held by them.  They are not affiliated with this site or author in any way.

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Using OSM to enhance NOAA charts

beaufort-nc-osm-mapFigure 1: Four layer JOSM built map (click on the image to expand it).

I have been using the free NOAA ocean charts that are available from the NOAA.  While these charts are wonderful, they lack in some respects when the interesting detail lies on the shore.  Naturally, the NOAA data contains mostly waterway charts, making any complaint about the lack of land detail not reasonable.  The NOAA charts are doing what they ought to do.  Clicking on the graphic (above) will display it in higher resolution.  Once that is done, it can readily be seen that the inshore detail resolution on the OSM map is somewhat better than what is on NOAA charts, where the latter of which may have only a smattering of onshore detail.   In this article, I am describing my use of OSM to compliment NOAA charts.

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Using GrADS to Forecast the Weather

gradscreen2Figure 1:   GrADS in action (click to enlarge).

As part of my ongoing weather realm self education, I’ve been playing with the GrADS weather (earth science) data analysis and display tool.

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