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Hi! Galmon guy here. This has only once been a problem, someone with a modified firmware, and that produced some exceedingly strange data. In the galmon design, which is quite neat if I say so myself, data is stored per source. If any data is bad, we can throw it out. If someone would really want to mess with us they could of course. But we're probably niche enough that people don't bother.


How about maybe support for GPS extensions like WAAS (used by aircraft to land in US but can be accessed by some consumer devices)

https://en.wikipedia.org/wiki/Wide_Area_Augmentation_System

Greatly improves altitude accuracy in North America


It has it. Look for SBAS right above the chart. That's the term for WAAS/EGNOS/etc systems. Satellite-based augmentation system.


Any plans to support other navigation systems? Would love to help with https://en.m.wikipedia.org/wiki/Indian_Regional_Navigation_S...


Are there even any chipsets out there that can receive IRNSS? I don't think the very common u-blox ones can. It seems like only some Qualcom 4G/5G chipsets support it, which are probably difficult to get on a hacker-friendly add-on board, especially outside India?


Yeah, probably something to reconsider by end of this year. There’s a planned mandate for smartphones to support this: https://www.gpsworld.com/india-mandates-navic-support-for-sm....


Septentrio, Hemisphere and Trimble have boards capable of receiving NavIC/IRNSS, at least. The cheapest module would probably be Septentrio Mosaic-X5.


Digikey lists that module (which is not much different in size/shape from the U-Blox modules) at 675$, so I'm not sure this puts it in the cheap/hobbyist range ...




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