Message-ID: <5A29AF93.9030908@posteo.de>
Date: Thu, 07 Dec 2017 22:16:03 +0100
From: DK7FC <selberdenken@posteo.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org> <5A19FF75.7080801@posteo.de> <CANA3B6VmLfG7AA692ajKxa6+swztKOmi-YcattQQOi_mMPzitA@mail.gmail.com> <5A1FFE7C.9050703@posteo.de> <CANA3B6X8GZOzduMGcppmDHdTDQ6R5Pq6GHSUuRuuRASe9WbA7Q@mail.gmail.com> <5A226B0C.3080701@posteo.de> <CAEduzkpDMw-kvmbU9q4DMhtzeQJdQd=5D0Xqa73auHaVGpH-8A@mail.gmail.com> <CAL4b5hBWRNbMSm7P2H6BTDTa3qPEiHNgF16R9o3A-X9ggAV6uw@mail.gmail.com> <579355A36AEE9D4FA555C45D556003AB9AAB0EB9@servigilant.vigilant.local> <5A25C304.3050607@posteo.de> <CANA3B6UU_AWP3S4K0XT4yju_ZKi+DM3Z8LYAOu0_KrHXR_W9aA@mail.gmail.com> <5A271218.9040803@posteo.de> <CANA3B6VSci3YUufSQ73iV2jFAg-i46zLzr9dxNeGwabCkL9Xzw@mail.gmail.com> <5A282BF9.4050409@posteo.de> <e9997cfe-639f-788e-e87d-149878bf5e31@abelian.org> <5A29193A.2090600@posteo.de> <db1d866c-49c3-1b8d-dcd7-2bc75ee1a414@abelian.org> <5A29A373.6060406@posteo.de> <e2c3a78f-0b8c-5e9e-879d-9c9bd0191d9e@abelian.org>
In-Reply-To: <e2c3a78f-0b8c-5e9e-879d-9c9bd0191d9e@abelian.org>
Subject: Re: VLF: TA east to west?
Content-Type: multipart/alternative;
 boundary="------------010505070702040902000107"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

This is a multi-part message in MIME format.
--------------010505070702040902000107
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

45 minutes left before the message starts. I can change to CRC 12 but 
08:08 UTC means that about the last 90 minutes are running in daylight 
here.
Let me go to CRC 10, that's 9 hours and 36 minutes. And i'm starting 30 
minutes earlier.
If it decodes it won't be the last message anyway. It is then just the 
beginning! I would then want to pass my call over there for example, 
i.e. 5+ nights of stacking...
So:
*f = 17470.1000 Hz
Start time: 07.Dec.2017  21:30:00 UTC
Symbol period: 60 s
Characters: 1
CRC bits: 10
Coding 16K21A
Duration: 09:36 [hh:mm]
Antenna current: 1 A*

73, Stefan


Am 07.12.2017 22:01, schrieb Paul Nicholson:
>
> Stefan wrote:
>
> > Today i'd like to try that first east to west VLF TA
> > transmission. Let's try:
>
> > f = 17470.1000 Hz
> > Start time: 07.Dec.2017  22:00:00 UTC
> > Symbol period: 60 s
> > Characters: 1
> > CRC bits: 6
> > Coding 16K21A
>
> That may decode in one attempt if lucky, but likely two
> transmissions will be needed.  If it does decode, then
> the chance of it being the correct decode from random
> noise is 0.02 %.
>
> Can you run until 08:08 UT with CRC 12 and the other
> settings the same?  A gain of 0.74 dB which will make
> a good difference.  And if it decodes, the chance of
> a random correct decode is only 0.0004 %.
>
> I hope the weather doesn't spoil the transmission, but
> if you keep trying, you are sure to succeed.
>
> -- 
> Paul Nicholson
> -- 
>

--------------010505070702040902000107
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
45 minutes left before the message starts. I can change to CRC 12 but
08:08 UTC means that about the last 90 minutes are running in daylight
here. <br>
Let me go to CRC 10, that's 9 hours and 36 minutes. And i'm starting 30
minutes earlier.<br>
If it decodes it won't be the last message anyway. It is then just the
beginning! I would then want to pass my call over there for example,
i.e. 5+ nights of stacking...<br>
So: <br>
<b>f = 17470.1000 Hz<br>
Start time: 07.Dec.2017  21:30:00 UTC<br>
Symbol period: 60 s<br>
Characters: 1<br>
CRC bits: 10<br>
Coding 16K21A<br>
Duration: 09:36 [hh:mm] <br>
Antenna current: 1 A</b><br>
<br>
73, Stefan<br>
<br>
<br>
Am 07.12.2017 22:01, schrieb Paul Nicholson:
<blockquote cite="mid:e2c3a78f-0b8c-5e9e-879d-9c9bd0191d9e@abelian.org"
 type="cite"><br>
Stefan wrote:
  <br>
  <br>
&gt; Today i'd like to try that first east to west VLF TA
  <br>
&gt; transmission. Let's try:
  <br>
  <br>
&gt; f = 17470.1000 Hz
  <br>
&gt; Start time: 07.Dec.2017  22:00:00 UTC
  <br>
&gt; Symbol period: 60 s
  <br>
&gt; Characters: 1
  <br>
&gt; CRC bits: 6
  <br>
&gt; Coding 16K21A
  <br>
  <br>
That may decode in one attempt if lucky, but likely two
  <br>
transmissions will be needed.  If it does decode, then
  <br>
the chance of it being the correct decode from random
  <br>
noise is 0.02 %.
  <br>
  <br>
Can you run until 08:08 UT with CRC 12 and the other
  <br>
settings the same?  A gain of 0.74 dB which will make
  <br>
a good difference.  And if it decodes, the chance of
  <br>
a random correct decode is only 0.0004 %.
  <br>
  <br>
I hope the weather doesn't spoil the transmission, but
  <br>
if you keep trying, you are sure to succeed.
  <br>
  <br>
--
  <br>
Paul Nicholson
  <br>
--
  <br>
  <br>
</blockquote>
</body>
</html>

--------------010505070702040902000107--