On Sat, 11 Sep 2021, Marty Glapa wrote:
> Any ideas on this analog APRS issue? I see an issue with elevation a while ago but see now resolution.
First things first: There is no analog APRS. APRS is a digital protocol.
Some manufacturer apparently is confusing DMR or D-Star/DPRS with APRS and
somehow thinking DMR would be more digital than APRS. :)
> When I view GPS info on my Anytone 878 handheld screen the latitude,
> longitude and elevation are all correct regardless of where my location
> is. However, when I look at the data on
aprs.fi, my elevation always
> shows anywhere from about 700 to 1,200 feet lower elevation than where I
> am, latitude and longitude are correct. I see other HAMs on
aprs.fi
> using the same digipeater/ igate and their elevation is correct (so
> maybe not a network problem).
> It almost seems like the radio is sending the wrong altitude information
> even though GPS shows the correct information.
By your description it seems very likely that the radio is encoding the
altitude wrong, and you seem to have figured it out correctly.
aprs.fi is
just displaying what the radio is sending. You can check the raw packets
and what they contain after decoding here, just look up your callsign and
compare the decoded data with what you're expecting to see:
https://aprs.fi/?c=raw&call=&limit=25&view=decoded
Please contact the support department of the manufacturer, or the support
forum of that radio. This
aprs.fi forum is for discussing
aprs.fi (the web
site, and the iPhone/iPad app). This forum is not for general APRS topics
or support/issues of hardware and software from other vendors such as
Anytone.
I normally outright reject all posts in moderation phase when
device-specific configuration issues or bugs are posted (there are quite a
few coming in), but I made the exception to get a chance to point this
out.
- Hessu