24 Jan
2022
24 Jan
'22
3:13 p.m.
I did the math on RDF using 2 and 70 using difference time of arrival. The math worked
out that I needed gps clocks to get accuracy down to a 50m with 4 receiving stations.
However the gps clocks increased the price somewhat. I did not investigate the latency
involved with RTL dongles or even if that latency could be fixed/measured which would be a
key component. A dedicated radio may also need to be built to get RX carrier detection
latency predictable. But in theory it would be possible to build a network with unlimited
cheap RX stations reporting locations on a map APRS style from every received signal.
Matt
On 24/1/2022 5:11 pm, Tony Langdon via 44Net wrote:
On 24/1/22 5:48 pm, Steve L via 44Net wrote:
--
_____ _____
|___ |___ / Matt Perkins VK2FLY/VK2VO (advanced)
/ / |_ \ Woolloomooloo NSW (QF56od) +61403571333 matt(a)vk2fly.com
/ / ___) | A proud member of ARNSW, The WIA,
/_/ |____/ And the Waverley Amateur Radio Society.
On Sat, Jan 22, 2022 at 11:14 AM Robert Simmons
via 44Net
<44net(a)mailman.ampr.org> wrote:
I agree. An RTL-SDR may or may not cut
it (one way to find out ;) ),
but open source software, and open and inexpensive hardware would be
interesting to pursue.
Does anyone here have any interest in remote
reporting radio direction
finders ? ( RDFs )
I think if it can be developed as open source software using cheap
hardware like the RTL-SDR (the kiwisdr is expensive), that would be a
very good project worthy of an ARDC grant.