Showing posts with label Propagation. Show all posts
Showing posts with label Propagation. Show all posts

Monday, December 09, 2013

10m still lively

Still seeing plenty of transatlantic stations on 10m WSPR. I wonder how long it will last?

WSPR spots on 10m band at G4ILO

Monday, November 18, 2013

Sunpots!

With  smoothed sunspot number of  282 nd a solar flux of 177 we are continuing to enjoy great conditions on the higher HF bands. I can't remember the last time the sunspot number has been that high - though that joins a long list of other things I can't remember either. I'm surprised that more bloggers haven't commented on it - they were happy to spread gloom and despondency when the predictions said that this solar cycle ws going to be a dud.

I've spent most of my operating time on my favourite mode - PSK31. Truth is, I've always felt more comfortable at the keyboard than in front of the mic. But I really should try to get some time in on phone while conditions are this good. Who knows how long it will last?

WebProp- my solar weather web widget is proving to be a bit of an embarrassment with its prediction that HF band propagation will be poor. The algorithm clear places too much emphasis on the effect of high A and K index values.It would be better for users to use the condx=no option which will show only the raw ininterpreted data.


Thursday, May 16, 2013

10m 16 May 2013

10m WSPR spots @ G4ILO 1242z 16 May 2013
By running WSPR day after day on the same band you start to get a feel for how propagation behaves that you don't get from casual operation. It's interesting to compare this map of WSPR spots for G4ILO around lunchtime today with the kind of results I was getting in November. Then I was getting DX spots throughout the day. Now I'm getting mostly local spots, within Europe.

In the autumn the picture changed slowly through the day. Now, in springtime, the picture changes all the time. Stations pop up for a few cycles and then disappear, never to be heard of again. The signal reports vary wildly as well, from just above the noise to +10dB or even higher in the space of a few minutes. This didn't happen in November. It is a clear indication of Sporadic-E propagation: reflections from fast-moving clouds that are highly ionized and very reflective, creating a path with very little loss.

From time to time I pause the WSPR and tune the band to see what activity there is. I've also tried 6m for short periods. I've had a few spots on 6 (this is with 5W to my attic dipole) but the magic band is still fairly quiet at 55 degrees north. 10m is far from being wide open yet too. I've still to see what WSPR is like when the band is open and signals are romping in at S9+. So I will continue with my WSPR monitoring in the expectation that things will get even more interesting.

Sunday, March 24, 2013

DXMaps needs your support!

The DXMaps website run by Gabriel EA6VQ needs your support. This is the site that plots contacts spotted to the DX Cluster on a map, band by band, to show propagation in real-time. It is especially invaluable during the summer Sporadic-E season to track the rapidly-moving band openings.

DXMaps plots DX contacts band by band in real time
The trouble with any web site is that if it becomes very popular the costs of running it grow beyond what most people can afford as a hobby. According to EA6VQ the cost of a new dedicated server for the site will be $250 a month. So he is asking users to become "supporter users" by donating $33 US per year. But any donation is welcome.

If you are an active operator, especially on six metres and up, you will know how invaluable DXMaps.com is. Hopefully hams will step up to the plate and send Gabriel a donation.

Thursday, December 06, 2012

Beacon monitor back online

For the time being I have put my IBP Beacon Monitor page back online. As I mentioned in a previous post, this is really something that needs to run 24/7 to be of most value. I note that I am not the only beacon monitor who states that monitoring runs only when not otherwise using the radio and antenna. So perhaps I will manage to keep it going for a bit longer than previously.

I updated the list of other beacon monitoring stations at the bottom of the page, deleting those that did not appear to be active. The official NCDXF/IARU International Beacon Project beacon monitors page has a lot of dead links on it.

It's interesting to take a look and see what propagation is like in other parts of the world. It's a pity there aren't more beacon monitors in the USA. And is propagation really that good in VK-land?

I like the additions F4CWH has made to his beacon monitor pages. I wonder if he would share with me how he has done it? I would particularly like to indicate which beacons are off the air. Three of them. including the one on the east coast of the USA (New York) are not operating at the moment.

Monday, November 26, 2012

10m 26 November 2012

10m WSPR spots @ G4ILO 26 November 2012
What this map doesn't show is that all the spots are barely visible, -25 to -27dB, so propagation would not be good enough to support a regular communication mode.

Saturday, November 24, 2012

10m 24 November 2012

The first day of the CQ WW DX CW contest and propagation on 10m is disappointingly down compared to previous days.

10m WSPR spots @ G4ILO 24 November 2012
No propagation to USA as you can see.

I have made a handful of contest contacts on 10m but I have been too preoccupied with computer issues to really get into it. Perhaps tomorrow will be better.

Saturday, November 17, 2012

10m 17 November 2012

10m WSPR spots @ G4ILO 17 November 2012
Another day of good propagation. I don't know why OH1CO was using the suffix /QRP (aren't most WSPRers using 5w or less?) but it really upset the WSPR encoding algorithm. His call was being decoded at my end as OH1/P00XEK!

It's magic!

I'm starting to believe that my attic dipole does have magical powers on 10 metres. Right now I'm hearing or being heard by 8 different stations but they are only hearing or being heard by me!

Wednesday, November 14, 2012

Poor conditions

Propagation is really poor at the moment. Never has my WebProp propagation widget been quite so accurate. On 10m WSPR I am hearing nothing and no-one is hearing me. On 30m APRS it's just as bad. I'm not picking up a single packet.

I opened WebProp's page in Google Chrome and noticed that the small format widget had a vertical scrollbar on the right hand side. I thought I could remove it by adding a few pixels to the iframe height attribute but it didn't seem to make any difference. I think a bug in Chrome might be causing this. The presence of the scrollbar reduces the width of the table causing several lines to wrap and making the table taller.

I found that the scrollbar was eliminated by adding the attribute scrolling="no" to the iframe definition. If you are using WebProp on your website I recommend you do the same. If you aren't sure exactly what to do then go to the WebProp web page. The code examples have all been updated with this extra attribute.

I recommend you to do this even if you don't see the scrollbar in Google Chrome. That will prevent it from appearing in any web browser.

Tuesday, November 13, 2012

10m 13 November 2012

10m WSPR spots @ G4ILO 13 November 2012
Some pretty good propagation on 10m today, though not exceptional. During the morning it was interesting to note several spots of G and GW stations. I was received by fellow blogger Tim G4VXE. I didn't hear him though.

I took time out to make a few digital contacts. I worked two Russians on 12m (using the 10m dipole) then a few more plus a couple of Americans on 10m. Best contact was NP3IR Hector in Puerto Rico, who has just this minute spotted me on WSPR too!

2012/11/1311:4624.921BPSK31RV9MA599599VladOmsk
2012/11/1312:1024.922BPSK31RN1TV599599SergeyStaraya-Russa
2012/11/1312:2428.122BPSK31RZ1OK599599YuriOnega
2012/11/1312:4028.120BPSK31NP3IR599599HectorAibonito
2012/11/1314:3428.122BPSK31RZ6AVM439599EwgeniyKrasnodar
2012/11/1314:3828.122BPSK31RA3TAC599599VladNizhny
2012/11/1314:4528.122BPSK31W4ECZ559579Waynenr Tampa
2012/11/1314:5128.122BPSK31UY7QL599599OlegPologni nr Zo...
2012/11/1314:5728.122BPSK31RW9SQ599599VictorOrenburg
2012/11/1315:0528.122BPSK31KC4FNE599599BobBlacksburg, V...

That's cool! I can mark and copy lines from my contact log, then paste them into Blogger and they come out formatted. Never knew you could do that.

Sunday, November 11, 2012

10m 11 November 2012

10m WSPR spots @ G4ILO 11 November 2012
Ten metres seems to have perked up a bit today, though conditions don't seem as good as they were a week or so ago.

During the afternoon on PSK31 I heard, but didn't work, Mexico and Panama. No WSPR monitors there so they don't show up on the map.

Calling CQ resulted in contacts with some East coast USA stations. Propagation to Europe can't have been that good. I think this is the first time that I didn't get called by European and Russian stations.

I heard several USA stations working in a 10-10 contest. I don't have a 10-10 number so I didn't try to contact them. As a fan of 10m I like the idea of 10-10 but to be a member you have got to be sponsored by several existing members and then pay a membership fee. That's way too much hassle and expense just to get a number to send people. The European PSK Club has the right idea. Membership is free to anyone and communication with members is via a web site.

Thursday, November 08, 2012

10m 8 Nov 2012

10m WSPR spots @ G4ILO 7 November 2012
 Another fairly quiet day on 10m. I took time out from WSPR during the early afternoon to do some PSK31 operating. There was some good DX about. First I worked Ian 3B8IK in Mauritius. I heard 5H3NP in Tanzania, but he didn't appear to be CQing. I found a clear spot and called CQ myself hoping to be heard by the African station but every time a station from the Eastern USA called me! It was better than when the band was wide open as there was less QRM making it easier to hear stations.

I like working stateside because ops seem more willing to have a proper QSO instead of just exchanging reports and details. I don't think that says anything about the relative friendliness of Americans and Europeans, it's just down to the fact that Yanks and us both speak the same language whereas for the European stations that are all I can usually work English is not their native language.

PSK Reporter map showing stations heard/worked by G4ILO on 8 November 2012

Wednesday, November 07, 2012

10m WSPR spots 7 Nov 2012

10m WSPR spots @ G4ILO 7 November 2012
Very few WSPR signals received at G4ILO today. A number of weak transatlantic spots of my 2 watt signal make the picture look better than expected.

Tuesday, November 06, 2012

10m WSPR spots 6 Nov 2012

10m WSPR spots @ G4ILO 6 November 2012
Strange conditions today. I'm seeing hardly any traces at the moment but several east coast US stations are spotting me. I even checked to make sure I wasn't running 100w by accident!