I decided to ensure that I was logging the aircraft I saw into a database (virtual radar is super handy with the plugin for this). I then ran my own numbers from the same data.
I can't quite replicate your results (There's a question as to if you're using first contact range or last contact range (or maximum contact range?) on the distances), but I have huge disparity between your data and what I've got for my receiver:
Take the 3rd of November 2018:
Footnotes:
1: Do you count just first, just last, maximum distance of the aircraft? Do you use Haversine formula for the great circle distance?
2: The average per-day distance isn't listed, but this is the average as listed on the share-statistics page
3: Your page defines a hit as "number of updates from aircraft to receiver - regardless of update content". In my figure, I've only included the positional update counts. (if I counted all the updates it'd be a much larger difference, in the order of 2-3 million)
If I could post links then I'd also include screenshots; the polar plots are vastly different, and I've got a vastly different histogram and aircraft seen barchart (which I've upgraded to include the positions seen as well, which looks super nice).
Granted, I do also see a few military aircraft (on the order of 10-15 a day), but their counts are low enough that it can't explain the discrepancy I'm seeing.
Basically, can we have an honest chat about how you're constructing the data on the feed-stats page and why I can't seem to correlate any of your numbers for my own data? Maybe we can work together to increase the accuracy of this data and help everyone at the same time. :)
(If anyone wants to see my FR24 stats, have a look at ID 18457)
I can't quite replicate your results (There's a question as to if you're using first contact range or last contact range (or maximum contact range?) on the distances), but I have huge disparity between your data and what I've got for my receiver:
Take the 3rd of November 2018:
| Criteria | Your data (as per the FR24 site) | My data |
| Aircraft seen | 1245 | 1972 (unique aircraft), 3561 total |
| Positions reported | 2353 | 2682 |
| Maximum distance 1 | 155nm | 206.72nm |
| Average distance 2 | ~80nm | 92.76nm |
| Hits reported 3 | 11920 | 550426 |
| Histogram |
|
|
Footnotes:
1: Do you count just first, just last, maximum distance of the aircraft? Do you use Haversine formula for the great circle distance?
2: The average per-day distance isn't listed, but this is the average as listed on the share-statistics page
3: Your page defines a hit as "number of updates from aircraft to receiver - regardless of update content". In my figure, I've only included the positional update counts. (if I counted all the updates it'd be a much larger difference, in the order of 2-3 million)
If I could post links then I'd also include screenshots; the polar plots are vastly different, and I've got a vastly different histogram and aircraft seen barchart (which I've upgraded to include the positions seen as well, which looks super nice).
Granted, I do also see a few military aircraft (on the order of 10-15 a day), but their counts are low enough that it can't explain the discrepancy I'm seeing.
Basically, can we have an honest chat about how you're constructing the data on the feed-stats page and why I can't seem to correlate any of your numbers for my own data? Maybe we can work together to increase the accuracy of this data and help everyone at the same time. :)
(If anyone wants to see my FR24 stats, have a look at ID 18457)