Hi all
We're two days away from the start of our special listening event - your
chance to decode those DGPS noises, and take part in a fascinating angle on
our hobby. You can download a decoder, such as the excellent 'DSCdecoder',
and try it without charge for the period of the CLE.
You will find all the necessary advice about decoding and the beacons to be
'heard' by visiting the CLE page via
http://www.beaconworld.org.uk/info.htm Please read through the following advice carefully, including messages at
the end from Martin and Robert:
Days: Friday 29th Aug. - Monday 1st Sept.
Times: Midday to Midday, your local time
Range: 283.5 - 325.0 kHz (inclusive)
Tell us in your log about the DGPS beacons that you have decoded in the
range (plus any DGPS UNIDs that you may come across). If you decode
an odd DGPS beacon out of the range, please include it too.
There are some small differences from usual in making your log.
Please show on each log line:
The day (short or long format), UTC and frequency,
The DGPS site's TX ident with prefix '#'.
These four fields come FIRST on the line, in any order within themselves.
PLEASE also show the Ref ID - i.e.the ACTUAL IDENT
that you decoded, also with a '#', and the Location;
then any optional fields such as BPS and distance.
A typical piece of a log might look like this:
dd UTC kHz TX ID Ref ID Location Cou km
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
29 19:05 284 #430 #660 Mizen Head IRL 655
29 22:30 285 #350 #500 Cabo Machichaco ESP 889
29 22:26 285.5 #443 #693 Stirling (Earls Hill) SCT 586
29 22:37 286 #363 #526 Castellon ESP 1258
The ident (Ref ID) from the decoder is important because it is what you
actually received (we would ALWAYS show the Morse Ident received from
a normal NDB, of course, not just the location that we deduced from it). The
Ref IDs (called 'Station ID' by DSCdecoder) define the reference stations
used for receiving GPS signals.
The TX Ident is important because, in conjunction with the frequency, it is
used as the key to each DGPS site in the various databases.
You can find the TX ID, knowing the decoded Ref ID and frequency, by looking
in one of the databases. Martin also provides a look-up tool in Rxx.
(For a few countries the transmitted Ref ID is the same as the TX ID,
though that is not the strictly correct practise).
Please make sure that you have the DGPS Station frequency correct for
every logging - it can be easy to get mixed up when the receiver's frequency
reading is some way away from it.
In Europe the channel spacing is 500 Hz but in North America it is 1 kHz
(that's why the band goes another 10 kHz up to 325 kHz). So for signs
of T/A activity, US members should also check the .5 channels below 315 kHz
and Europe members should also check the .0 channels above 315 kHz.
Do be careful to avoid 'rogue' decodes - it is so easy to be misled into
thinking that a decode MUST be that special station you were hoping for!
Alan's Guides explain how to interpret the decoded information so that you
won't be fooled. If you do get any doubtful loggings, it would be a good
idea to show them separately after your main list, together with the
decoder's output.
Sometimes a DGPS site may change to send its alternative Ref ID -
if you find an example of this you could show two log lines - or add a note
on the right hand side of a single line. The Rxx database of reported
reception and the DGPS World Database both show all these idents.
Please don't forget to give your location and brief details of the equipment
that you were using, including the decoder.
Send your log to the list as a Plain Text email using 'CLE108' in its title.
Make sure that it has arrived on the list by 08:00 UTC on Wednesday
3rd September at the very latest. I hope to finish making the combined
results on the same day, unless there are a lot of problems.
I will send the usual 'Any More Logs?' email about 1700 UTC on Tuesday
so you can check that your log has been found OK.
Alan or I can help during the weekend if anyone has problems with decoding
or queries on the DGPS beacons or showing results in your log.
Enjoy the CLE.
Good decoding!
Brian
----------------------------------------------------------
From: Brian Keyte G3SIA cle(at)beaconworld.org.uk
Location: Surrey, SE England (CLE co-ordinator)
----------------------------------------------------------
NB If you use the short 'dd' date, please separate any loggings made on day
'01' (1st September) so that they appear AFTER the other August ones.
This will be a big help to our dedicated colleagues who enter the Rxx data
(if the month jumps about between Aug and Sept they have to define the month
separately for each line).
Request from Robert:
"Would European members or North American members who have received
signals from Europe and are willing to allow their logs to be used in my
next Marine Beacon column for Monitoring Monthly, please indicate so when
submitting their final logs".
He may also subsequently in his column give a quick run down of the CLE and
a plug for the list.
REU 
Sivu: 1 2
CLE108 (Luettu 13137 kertaa)
