Hi Alan,
Since 'dups' are a frequent source of questions in my wsprdaemon group, I have included that group in this response.
Your 60M 'dups' are certainly not a problem for wsprdaemon, but due to limits in wsprnet.org's spot reporting, as detailed by Phil below, he can't easily detect your 'tx-generated-dups' among the many more 'receive-site-dups' recorded by receive sites which use multiple copies of WSJT-x or other SW packages. Those 'receive site generated dups' waste transfer bandwidth, CPU time and storage space at wsprnet.org, and some sites are recording almost 20,000 dups per day. And snce there is no way to differentiate between the antenna+receivers generating those duplicate spots, there is no useful information which can be learned from them. Receive sites using my wsprdaemon SW separately report 60M and 60eu, but they are separate bands because one 3 kHz rx channel can't cover both of those 'bands'. There is an analogous situation on the 80M and legacy 80eu bands.
In contrast,wsprdaemon reports only one rx_band+tx_call+tx_grid signal for each WSPR cycle. It also includes the capability to define a single logical receiver whose spots are taken from the antenna+receiver with the best SNR on each WSPR cycle. Further, all spots from all antenna+receivers can be uploaded to the wsprdaemon.org database where the individual antenna+receiver spots can be analyzed and displayed.
But if you want to compare the performance of your two transmitter+antenna systems, I would think you could learn a lot more if they used different transmit call signs.
73,
Rob
On Sun, Oct 31, 2021 at 2:58 PM Philip Barnard < vk7jj@...> wrote: Hi Steve,
For the sake of Alan who is CC'd to this mail, as per my reply to your first mail, the 20m and 40m "duplicates" shown in your email aren't duplicates, they have different SNRs meaning they are the same transmission reported by two different receivers. The WD software normally selects the best SNR to upload and discards the rest but it appears that didn't happen in this case.
--
Re. the different 80m and 60m sub bands, here's a copy of a reply to a similar question about why they and other experimental bands are not available for searching via the band menus of my apps and how to use advanced search to get them, it's very simple really.
Yes, I could put them in the band menu and add the frequency search behind the scenes but I'm not inclined to. Some are not recognised as bands by various parties including WSPRnet and there a quite a few experimental bands out there. Thus there will always be a mechanism required to let people get at non-standard frequencies so it's better to keep the band menu as per the WSPRnet standard and empower people to use an advanced search that will cover all their options.
Hope that helps,
Regards,
Phil
---
All the 60m data we get from WSPRnet's API for the 60m band is a mixture of 5.2Mhz and 5.3MHz spots. Thus Arne's db can only be queried on the basis of band = 5 and the WD database where wd_band = '60' and both dbs return a mixture of 5.2Mhz and 5.3MHz spots. There is a solution using advanced search based on frequency. For wsprd.vk7jj.com (accessing the WD Postgres db) you should select 60m from the band menu and then use either and "MHz" < '5.3' or and "MHz" > '5.3' as per the screen shot below. For wspr.rocks (accessing Arne's ClickHouse db) the syntax is different and frequency < '5300000' or and frequency > '5300000' The same works for the 4m band or for different segments of the 2m band or for 27MHz, though in those cases the band menu should be set to "all bands". and frequency > '70100000' and frequency < '70200000'
On 1 Nov 2021, at 6:35 am, Steve Sykes < steve@...> wrote:
Rob, It looks to me that Alan is transmitting on both 60 meter
frequencies which should be fine. ZKD splits out the two 80 meter
and 60 meter frequencies, VK7JJ does not. That would cover the 60
meter and 80 meter dupes. I am more concerned about the 40 and 20
meter ones. Steve
On 10/31/21 6:59 PM, Rob Robinett
wrote:
Hi Steve,
Phil's site
shows me that in the last 24 hours almost all of your dups
(and those of many other reporters) are on 60M where Alan
G4ZFQ is transmitting on two 60 channels at the same time.
Hi Alan,
Can you
explain why you are transmitting on the same WSPR band at
the same time with the same call sign?
73,
Rob
<Screen Shot 2021-10-31 at 11.51.36 AM.png>
On Sun, Oct 31, 2021 at
11:41 AM Steve Sykes < steve@...> wrote:
Phil. I am seeing a high number of dupes and I don't
understand why. The first one may be frequency but the
others are showing a version of WSJT-X that I am not
running. All my spots go through wsprdaemon. Any idea
why I am getting these? 73 Steve KD2OM
<kobncmkccikjaeel.png>
<minfjfkdgakdjjpj.png> <mlaemjmeondjacal.png> <njmhlfbobhphajdj.png>
--
Rob Robinett
AI6VN
mobile: +1 650 218 8896
-- Rob Robinett AI6VN mobile: +1 650 218 8896
|
