Monthly Archives: April 2016

Real-time Flight Status And Radar For All US/Canada Flights

For those who receive (and send) flight data from ADS-B capable devices such as the RTL-SDR dongles or have Apps for their tablets and phones, FlightAware announced on Wednesday this change to their service:

Hi from FlightAware,

After months of development, we released a large upgrade to our back-end flight tracking engine on Tuesday. Not only did the upgrade include dozens of bug fixes and flight tracking improvements, but we added a massive enhancement for US and Canadian flight tracking — the flight status and radar data is now live with no more five minute delay! Previously, the US/Canada data feed contained a five minute delay in addition to our ~30 second processing time, but now all data is less than a minute delayed from real time. In addition to the general improvement, this yields a lot of additional benefits:

More seamless transition between RADAR, ADS-B, and MLAT positions

Flights will no longer transition from “Arriving soon” to “Arrived 5 minutes ago”

Fewer estimated positions due to delayed RADAR data

Now that the radar data in the US and Canada is real-time, we’ll soon be enabling public MLAT data in the US, which is real-time just like our ADS-B data.

This is a major upgrade in data for folks in North America, and it will make using programs like PlanePlotter even more useful!

For those who might be interested in building their own dedicated ADS-B receiver, information may be found here. Of course FlightAware may be used as an online flight checking service just for tracking the progress of a given flight, which is in itself a lot of fun!

Robert Gulley, AK3Q, is the author of this post and a regular contributor to the SWLing Post. Robert also blogs at All Things Radio.

Spread the radio love

First DRM European Workshop

2 Replies

Many thanks to SWLing Post readers, Cap and Bill, who both shared this press release from the DRM consortium:

(Source: DRM Consortium)

First DRM European Workshop “Flexible and Complete Digital Radio for Europe”
asks European Stakeholders to Support and Manufacture DRM and DAB+ Receivers

Following from a very successful General Assembly, the Digital Radio Mondiale (DRM) Consortium, and the German DRM Platform held a most comprehensive European workshop hosted by Fraunhofer IIS in Erlangen, Germany from 6th to 7th April 2016.

This was a first such DRM event aimed at offering solutions to all broadcasters large or small. During their presentations and discussions participants stressed that DRM is the ITU endorsed and internationally adopted standard for the distribution of programmes internationally, nationally and up to local coverage level. DRM can also provide an economic and complementary solution to exactly those coverage scenarios that the established DAB/DAB+ networks in Band-III were never designed for.

Following their deliberations the participants urged all stakeholders of Digital Radio in Europe – including European organisations, regulators, broadcasters and the receiver and automotive industry – to embrace publicly the duality and complementarity of the open DRM and DAB standards as the complete Digital Radio solution for Europe (and worldwide). This means a digital future for all broadcasters, offering more programme choice to listeners, extra multimedia services with text and images, increased energy savings and spectrum efficiency. The participants ask ‘all European stakeholders to promote actively the manufacturing and distribution of multi-standard Digital Radio receivers, comprising at least the DRM and DAB standards.’

The first session, held in conjunction with the open part of the DRM General Assembly, took a brief look at the status of DRM adoption around the world, including the DRM roll-out in India, ready to become the largest digital radio market in the world with over 600 million people being reached by DRM broadcasts. Presentations given by experts from various European countries showed that the digitisation of radio progresses in Europe. At the end of the first day Fraunhofer IIS (Bernd Linz) demonstrated the latest development to provide traffic and travel services in DRM radios, soon to be installed in Asia. Afterwards Martin Speitel demonstrated the features of the Fraunhofer software package for car radios with DRM. With this solution, radio manufacturers can quickly build or enhance radio platforms on a proven modular system covering the full DRM and DAB standards including their full feature sets, thus shortening their development times and, in turn, reducing their costs.

On the 7th April benefits and opportunities of DRM were shown with practical applications. Ampegon (Matthias Stoll) showed how easy and cost-effective the transition from analogue AM to DRM can be. Marc Holthof of the German Navy gave an example of how to use DRM over shortwave for maritime broadcasting of information and entertainment to ship crews at sea. Csaba Szombathy, Technical University of Budapest, demonstrated his original monitoring programme of DRM transmissions. Then RFmondial (Jens Schroeder), demonstrated how to provide DRM services in the crowded FM band compatible with all the existing FM stations. Joachim Lehnert, German DRM Platform Chairman, showed that DRM is a suitable system for local/regional coverage in VHF Band III, fully compatible with DAB/DAB+ and DVB-T networks and in keeping with RRC-06. RFmondial (Detlef Pagel) also referred to the use of DRM in VHF Band III and stressed that DRM+ is the most suitable digital system for the local and regional single-station broadcasters, as a complement to multiplexes, while sharing all the listener related features with the DAB+ standard. Finally, Manfred Kühn, Mobile Broadcast Consult, demonstrated the flexible transmission of multiple DRM channels in a single DAB frequency block in VHF Band III.

This session was followed by a status report on the development of digital multi-standard radios, presented by Robert Bosch Car Multimedia, NXP, Fraunhofer IIS, PnP Networks and Panasonic. All the speakers finally emphasized the market and framework requirements for the production of multistandard radios for Europe.

Joachim Lehnert, Chairman of the German DRM Platform, concluded that the workshop was an important step to bringing national activities together and added; “With all the European DRM activities presented over the past two days and the encouraging messages from the receiver industry, I believe that the famous ‘chicken or egg’ problem can be solved from the receiver end by adding DRM as a complement to existing digital receivers. This will eventually help all radio broadcasters across Europe, whether national, local or community stations, and will ensure each has a digital home in the future.”

Click here to download the PDF of this press release.

Spread the radio love

Heard VK0EK on the radio

6 Replies

Heard Island (Image: VK0EK)

Regular SWLing Post readers know that I’m a ham radio operator (call sign K4SWL). Being a shortwave radio enthusiast, of course, I spend most of my time on the air in the HF portion of the amateur radio spectrum. Contacting distant stations and connecting with other ham radio operators around our little planet gives me immense joy.

Most of you also probably know that I’m a fan of all things Antarctic, so it should come as no surprise that I really wanted to work VK0EK: the Heard Island DXpedition.

Thing is, my life has been so hectic lately, I’ve barely been home during the Heard Island DXpedition (March 29th – April 11th). And the days I have been home, VK0EK’s signals have been incredibly weak.

In short: timing and propagation were all working against me. And VK0EK was soon to pack up and come back home. I was becoming desperate…and beginning to lose hope that I’d make any contact with this unique and rare entity in the isolated stretch of ocean between Madagascar and Antartica.

“Antennas with a clearing” on Heard Island (Photo by Bill, AE0EE)

My hope was waning. Then, Tusday evening, I gave a presentation about shortwave radio at the Blue Ridge Amateur Radio Club. On the hour-long drive home, I stopped by my good friend Vlado’s (N3CZ) to confess my troubles to the radio doc.

Now it just happens that Vlado has a much better antenna set-up to work DX than I do, and what’s more, (close your ears, fellow QRPers) he has an amplifier.

Most importantly, though, Vlado is a keen DXer. He’s got 330 countries under his belt, and ever up for a challenge, routinely pushes himself to accomplish more with less. In January, with members of the local club, he entered a QRP challenge; he had 100 countries worked by the following month, all in his spare time. And a few years ago, Vlado actually built a radio of his own design and worked 100 countries within two months (you can read about that here).

So, of course, he was game to help me make a contact…even if it was a long shot. A very long shot.

Juan de Nova

When I arrived at Vlado’s QTH around 21:00 local, VK0EK was impossibly weak, so we focused our efforts on 30 meters and FT4JA: the Juan de Nova Island DXpedition (another all-time new one for me).

A portion of the FT4JA antenna farm. (Image: FT4JA)

After more than an hour of calling, FT4JA finally heard my call and (woo hoo!) I was confirmed in their log.

But what about Heard Island?

After working FT4JA, we moved down to 40 meters where VK0EK was slightly louder than before. Well, maybe it’s not impossible, I thought hopefully. Just next to it.

Between QSB (fading) and tuner-uppers, my ears were bleeding trying to hear Heard’s minuscule CW signal–so faint, so distant were they.

After only about ten minutes of steady calling, Vlado made a sign to get my attention, and we strained to listen, very carefully.

VK0EK came back very faintly with just one letter incorrect in my call–it was enough that I didn’t catch it at first. But Vlado heard it, and after sending the call back a couple of times, then the report, VK0EK confirmed my call with a signal report, and I reciprocated.

Vlad and I leapt to our feet, yelling, “WOO HOO!” (and hopefully didn’t wake up any of Vlad’s neighbors).

Heard Island is actually running an online log that is updated live. We immediately looked there to confirm I was in their log, and was greeted with this great circle map and a line from Heard Island to my call sign in the States. Vlado made this screen capture as a momento:

Here’s to good friends and mentors

In one incredible evening, I snagged two all-time new ones–and I owe it all to my good buddy, Vlado. Most importantly, I’ve been learning so much from him as he patiently coaches me through some weak DX with serious pileups. Plus it’s just always fun hanging around Vlado, the best broken radio doctor I know, to whom “challenge” is…well, a piece of cake.

Thanks Vlado, for your enthusiasm and patience–I’m lucky to have a friend like you!

Spread the radio love

A $38.99 RTL-SDR with 100 Khz – 1.7 GHz coverage

10 Replies

Many thanks to SWLing Post contributor, Bill, who recently shared a link to this very affordable RTL-SDR with wideband coverage.

I am not at all familiar with this model, but I do like the enclosure and the fact it has both an HF and UV antenna jack. This must be one of the least expensive SDRs on the market with HF coverage.

Here are a few details per Radioddity.com:

Features:

100% Brand New And High Quality
Using the RTL2832 idle channel, broadband connection impedance isolation transformer provides the signal to the signal receiver HF HF bands.
Increased input low-pass filter to improve noise performance of the machine. At the same time, it retains the original V / UHF band reception, creative use of studded way to achieve RTL2832 + R820t circuit board assembly and connecting circuits increases
Further improve the overall performance of the circuit.
In the homemade circuit board also surrounded, surrounded reserved some help to further develop the pads. The entire circuit is loaded inside a small aluminum to further improve the performance of the overall circuit interference by aluminum shielding.

Package Contents: