Date
1 - 20 of 24
ULDXIndex and MWDXerDB V22.03
|
Paul Blundell
Hi all.
I am in the process of working on this month's update to MWDXerDB. What I am looking at doing is adding the ULDXIndex as a value which continually updates each time you add / change this for any station logged. I will provide any example below for my process but this would have different stations for each person. The numbers below are made up so that I can show what I mean. It starts at 0. I log 3GG and this gives me a ULDXIndex of 0.5. I then log 2CA and this has a ULDXIndex of 1, my ULDXIndex is now 1.5 (Adding both of these). I then log 5AN and has an ULDXIndex of 1.5, my ULDXIndex is now 3 (Adding this to the above) This would continue and also log how many stations and provide an average, over time you would try and improve your average by logging more stations at a higher signal level. Thoughts? The files could be shared and have an online table of them? Paul Paul |
|
|
|
James Rohrer
Paul, On March 7, 2022, at 2:57 AM, Paul Blundell <tanger32au@...> wrote: Hi all.
I am in the process of working on this month's update to MWDXerDB. What I am looking at doing is adding the ULDXIndex as a value which continually updates each time you add / change this for any station logged. I will provide any example below for my process but this would have different stations for each person. The numbers below are made up so that I can show what I mean. It starts at 0. I log 3GG and this gives me a ULDXIndex of 0.5. I then log 2CA and this has a ULDXIndex of 1, my ULDXIndex is now 1.5 (Adding both of these). I then log 5AN and has an ULDXIndex of 1.5, my ULDXIndex is now 3 (Adding this to the above) This would continue and also log how many stations and provide an average, over time you would try and improve your average by logging more stations at a higher signal level. Thoughts? The files could be shared and have an online table of them? Paul Paul |
|
|
|
mediumwavedx
Hi Paul,
How is the ULDXIndex assigned? Is it a reception difficulty index? Bill |
|
|
|
James Rohrer
My inclination is to use miles to the farthest station heard in a session. Google miles gives shortest road distance. This like bragging about the biggest fish you caught.
|
|
|
|
FenDrifter
Yea, whatever you do, don’t use the evil Google. I use this site to obtain ‘as the crow flies’ distances:
https://www.doogal.co.uk/MeasureDistances.php Drifter |
|
|
|
Paul Blundell
Those are just callsigns of some stations to use as examples. Paul On Tue, 8 Mar 2022, 12:45 am James Rohrer, <Jim.rohrer1955@...> wrote:
|
|
|
|
Paul Blundell
Hi Bill, I rate all the signals out of 5 and then use the below to work out the index value. 1 = 1.1 2 = 1.4 3 = 1.9 4 = 2.4 5 = 3 ULDXIndexValue = DistanceKM / PowerW * SignalLevel Paul On Tue, Mar 8, 2022 at 3:04 AM mediumwavedx <desertbilly@...> wrote: Hi Paul,
--
Paul |
|
|
|
Paul Blundell
Yes, here in Australia we have the ACMA database which gives the "straight line" distance between my location and the station Ihear, this is the distance I use. Paul On Tue, Mar 8, 2022 at 3:08 AM James Rohrer <Jim.rohrer1955@...> wrote: My inclination is to use miles to the farthest station heard in a session. Google miles gives shortest road distance. This like bragging about the biggest fish you caught.
--
Paul |
|
|
|
James Rohrer
Now I understand the importance of taking Station power into account and not just distance. tonight I heard I in 1630 Iowa City. Only 200 miles away but not heard before. 10,000 watts. My radio does not display signal power so I cannot compute the index . I need another radio.
Focusing just on AM sensitivity, not SW, which UL is best value? Needs to display signal strength. |
|
|
|
Paul Blundell
I don't use the signal meter, it is more a mix of signal level, audio quality and how "clean" the signal is.
On Tue, Mar 8, 2022 at 12:45 PM James Rohrer <Jim.rohrer1955@...> wrote: Now I understand the importance of taking Station power into account and not just distance. tonight I heard I in 1630 Iowa City. Only 200 miles away but not heard before. 10,000 watts. My radio does not display signal power so I cannot compute the index . I need another radio.
--
Paul |
|
|
|
James Rohrer
Paul,
Do you compute like this? Dividing before multiplying. ULDXIndexValue = (DistanceKM / PowerW) * SignalLevel Regarding signal level, I guess '5by5' could be guideline. If the signal is both strong and clear, then give it a 5. |
|
|
|
FenDrifter
BODMAS Paul?
|
|
|
|
Paul Blundell
Yes, that is the formula I use. I did also look at using two numbers but this got a bit confusing so I just give each signal a single index score. On Wed, 9 Mar 2022, 12:46 am James Rohrer, <Jim.rohrer1955@...> wrote:
|
|
|
|
Paul Blundell
|
|
|
|
Issac Quincey
Is that what you have coded this with? Would you think about my offer to review the code for security holes and bugs?
Sent with ProtonMail Secure Email.
------- Original Message -------
On Wednesday, March 9th, 2022 at 8:17 AM, Paul Blundell <tanger32au@...> wrote:
|
|
|
|
James Rohrer
See if I did this correctly. WWL New Orleans 870 AM came in tonight. 1635 km / 50000=.0327. Signal strength five so multiply and get .1635 as my index value.
Yesterday evening KCJJ in Iowa City 1630 AM came in 5 by 5. Distance is 330 km. Night watts are only 1000. Index value is 1.65. This is ten times better than the index i got from hearing the Clear Channel station down at the end of the Big Muddy. This suggests to me that instead of searching for strong signals I should make a list of 1000 watt broadcasters in my area and go hunting for them on my radio. |
|
|
|
Paul Blundell
Yeah, that is one way of doing it. The original way didn't include the signal level, it was something I have added. On Wed, Mar 9, 2022 at 2:34 PM James Rohrer <Jim.rohrer1955@...> wrote: See if I did this correctly. WWL New Orleans 870 AM came in tonight. 1635 km / 50000=.0327. Signal strength five so multiply and get .1635 as my index value.
--
Paul |
|
|
|
Paul Blundell
I have now made a change to how this is handled. Instead of adding them to a single file, I have created a file for each frequency and station, this will be updated each time I log the station and add the ULDXIndex. Paul |
|
|
|
Paul Blundell
The latest version is now online: https://ultralightradiodxing.blogspot.com/2022/02/software-mwdxerdb.html |
|
|
|
James Rohrer
Do you expect the ULI scores to be lower during the spring and summer? On Thu, Mar 10, 2022 at 9:20 PM Paul Blundell <tanger32au@...> wrote:
|
|
|