Hi all...
You may check also:
http://dx.3sdesign.de/index.htm?airplane_scatter.htm
I like hunting ghost signals and decode them ! Do you? ;) Especially on 6m
band when they are scattered from high muf clouds, Muf just bellow 6m but
also scattered, multipath scatter etc...
Best of all i will never
On 07/07/2019 16:50, David Tiller wrote:
-70 Hz at 50.313 MHz is a relative velocity of about -209 m/s or -468
mph. That's in the ballpark for a jet aircraft.
Hi David and all,
here is a handy web resource:
http://www.rfcafe.com/references/electrical/doppler.htm
note the first of the two f
-70 Hz at 50.313 MHz is a relative velocity of about -209 m/s or -468 mph.
That's in the ballpark for a jet aircraft.
On Jul 7, 2019, at 10:19, Rich Zwirko - K1HTV
mailto:k1...@comcast.net>> wrote:
Reino,
Yes, the main stronger FT8 signal is the one heard directly. The Doppler
shifted signal
On 7 Jul 2019 at 15:02, Rich Zwirko - K1HTV wrote:
> Martin,
> The reason why I believe that the ghost FT8 signals are not being caused
> by aircraft is because of the amount of Doppler being observed on the
> waterfall display. In the case of the aircraft reflections that you have
> observed, t
On 7 Jul 2019 at 11:37, Edward stallman wrote:
> I worked a new one JW7QIA Peter on 6m and was on the ON4KST 6m chat at
> the time . When the QSO was complete I Thanked Peter and pasted his
> final FT8 73 on the chat page . I don't understand the difference we
> each posted in DT ? Peter posted
Since the transmitted and received frequencies are known, another reality
check would be to calculate the velocity of the presumed moving Doppler target.
If it's outside the max operating speed of normal jet aircraft, it's probably
not one. Note that you can't say the same about speeds below mi
On 07/07/2019 17:37, Edward stallman wrote:
I worked a new one JW7QIA Peter on 6m and was on the ON4KST 6m chat at
the time . When the QSO was complete I Thanked Peter and pasted his
final FT8 73 on the chat page . I don't understand the difference we
each posted in DT ? Peter posted my RR73
6M is a fickle beast.
On Sun, Jul 7, 2019 at 12:41 PM Edward stallman wrote:
> I worked a new one JW7QIA Peter on 6m and was on the ON4KST 6m chat at the
> time . When the QSO was complete I Thanked Peter and pasted his final FT8
> 73 on the chat page . I don't understand the difference we each
I worked a new one JW7QIA Peter on 6m and was on the ON4KST 6m chat at
the time . When the QSO was complete I Thanked Peter and pasted his
final FT8 73 on the chat page . I don't understand the difference we
each posted in DT ? Peter posted my RR73 and the DT was 1.2 sec , I
posted his 73 and t
On 06/07/2019 21:06, Rich Zwirko - K1HTV wrote:
Here in the Mid-Atlantic, a number of 6 Meter FT8 DXers have observed
backscatter signals that appear as a 2nd or even a 3rd signal on the
WSJT-X Wide Graph window. The Doppler shifted frequency is usually
lower than the direct signal. In addition
Hello Hasan-
Others have this issue with Win10 on certain motherboards. I have ASUS Z97A
MB I7 4790 4 Ghz that will not run DAX reliably on Win10.
When Win10 came out tried the free upgrade and had the issue of seeing
input to WSJT-X but no decodes on several of 8 Instances running on my 6700.
Open
Reino,
Yes, the main stronger FT8 signal is the one heard directly. The Doppler
shifted signals, reflected from the direction of a strong Es cloud, are
usually between 40 and over 100 Hz lower, with the average of around -70 Hz.
73,
Rich - K1HTV
= = =
From: Reino Talarmo
To: "'WSJT software dev
Rich,
I hear what you say about the Doppler effect, and I recall our conversations on
HF about it. I do not challenge the theory and facts behind the Doppler
effect, but I believe there is more to the propagational phenomena we attribute
to the Doppler effect. Being one who often challenges c
Were you operating at the time?
That message is not a failure...it shows an audio catchup due to delayed audio
input which is suspicious as normally you shouldn't see that happen. So the
question is if the wave file got saved for that time period.
Each file name has the date/time encoded in it.
On 7/7/19 12:40 PM, Gary Rogers wrote:
P49X2019052822390022390014.08143614.08143620m20mFT4-05FT8
Sent: -14 Rcvd:
-18FK52al30313FT8
Sent: -14 Rcvd:
-18EdPos911P49SA91ArubaFM19ma00KO3FKO3FY
Do you think that QSLMSG, A_INDEX, K_INDEX, SFI have a reasonable value
? In my opinion
Hi Ed, is this what you need?
P49X2019052822390022390014.08143614.08143620m20mFT4-05FT8
Sent: -14 Rcvd:
-18FK52al30313FT8
Sent: -14 Rcvd:
-18EdPos911P49SA91ArubaFM19ma00KO3FKO3FY
Let me know if you need anything else…73 Gary KO3F
> On Jul 6, 2019, at 6:55 PM, Ed Muns wrote:
>
>
On 6 Jul 2019 at 16:06, Rich Zwirko - K1HTV wrote:
> Here in the Mid-Atlantic, a number of 6 Meter FT8 DXers have observed
> backscatter signals that appear as a 2nd or even a 3rd signal on the WSJT-X
> Wide Graph window. The Doppler shifted frequency is usually lower than the
> direct signal. In
OK, Mike; it failed at 054430 last night:
054430 -9 -0.1 1767 ~ EA4LU WA2VCQ EL87
40.463 dataSink1 33/50, k=114048, dT=3ms, catchup
Test Run Stared (timestamp of first saved file) on:
07/05/2019 @ 0956
the last decode I have in save file is timestamped:
07/07/2019 0200
Curiously,there i
Hi All,
Perhaps this a wrong forum, but still I like to ask how you explain ghost
signals with varying frequency offset? Do you have both a direct signal and an
ES reflection from a moving cloud?
73, Reino oh3ma
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