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#11
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FLARM firmware release schedule
On Jan 5, 8:49*am, Kenneth Kilbourne
wrote: -- Matt Can someone explain the differences between the Vaon MRX and the FLARM ? Only if you learn to trim your relies. Oh nevermind... Zaon MRX implements PCAS, its a passive listener of transponder relies (so those transponders need to be interrogated by something else like SSR radar or TCAS). You get accurate altitude information from the Mode C or Mode S transponders in nearby aircraft, but no direction information and a guesstimate of range based on received RF power. PCAS only sees aircraft equipped with Mode C or Mode S transponders. Flarm is much much more sophisticated/capable and uses a bidirectional data-link that transmits GPS coordinates (including altitude) and predicted flight path data to all nearby Flarm receivers. These classic Flarm devices (as opposed to PowerFLARM) will only "see" other Flarm equipped aircraft. Because of the high presision predicted flight path Flarm devices are particularly effective at avoiding false alarms and can provide a level of precision and usability well beyond any PCAS type devices and are much better suited for the glider-glider and glider-towplane type situations we encounter. Flarm devices also include handy IGC flight recorder capabilities. PowerFLARM provides the classic Flarm capability as well as including a PCAS receiver that will provide Zaon MRX like PCAS capability and ADS-B 1090ES receiver capability and will have an IGC flight recorder approved up to three diamond level. You can search this newsgroup for posts from me an others to find out more about what the 1090ES receiver part will and will not buy you over time. Many other things have been discussed here as well about PowerFLARM so before restarting things that have been covered before please search the newsgroup archive. And to be clear I'm talking here about the PowerFLARM model in the USA, standard configurations and options for models in other regions may vary. Some useful information about PowerFLARM for the USA is available here http://www.gliderpilot.org/FLARM Darryl |
#12
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FLARM firmware release schedule
On Jan 5, 8:40*am, mattm wrote:
The RF changes (the new frequency for the US?) is a very minor change. FLARM already runs on different frequencies in different parts of the world. Since you do not seem to have read the reference included in my initial post I'll repeat some of it he "Release 5 contains a new, higher performance FLARM engine which will be able to process more aircraft, a major redesign of the software required for integration of FLARM-features into hang-gliders and powered aircraft (PowerFLARM), its software-data-fusion with transponder-data and related requirements from regulators like EASA and FCC. This requires a modification to the radio communication amongst the units where we introduce frequency hopping to increase the radio bandwidth and reliability as well as some back-and-forth radio bursts for checking radio communication quality." Please note the expressions "a major redesign" and "we introduce frequency hopping". On what basis do you assert that this is a "very minor change"? Andy |
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