Geographic Coverage¶
Coverage is measured in unique Maidenhead grid pairs (transmitter grid + receiver grid). A grid pair with at least one spot means we have a measured propagation sample for that path under some set of solar conditions. More spots per pair means better characterization of that path across varying conditions.
Grid squares are 4-character Maidenhead (e.g., EN52), giving approximately 111 km x 111 km resolution. There are 32,400 possible 4-character grid squares globally.
Unique Grid Pairs by Source¶
| Source | Unique TX Grids | Unique RX Grids | Unique Grid Pairs | Pct of Possible |
|---|---|---|---|---|
| WSPR | — | — | — | — |
| RBN | — | — | — | — |
| PSK Reporter | — | — | — | — |
| Contest | — | — | — | — |
| Union (all sources) | — | — | — | — |
Coming soon — requires geographic coverage query.
Coverage by Continent¶
Unique transmitter grid squares with at least 100 spots in the WSPR dataset.
| Continent | Grid Count | Spot-Weighted Density | Primary Bands |
|---|---|---|---|
| Europe | — | — | — |
| North America | — | — | — |
| Asia | — | — | — |
| Oceania | — | — | — |
| South America | — | — | — |
| Africa | — | — | — |
| Antarctica | — | — | — |
Coming soon — requires continental coverage query.
Top 20 Most-Observed Grid Pairs (WSPR)¶
Grid pairs with the most total WSPR spots. High spot count means a well-characterized path with solar context across many conditions.
| Rank | TX Grid | RX Grid | Distance (km) | Total Spots | Bands |
|---|---|---|---|---|---|
| — | — | — | — | — | — |
Coming soon — requires top grid pairs query.
Coverage Density — Spots per Grid Pair¶
Distribution of how many spots exist per unique grid pair.
| Spots per Pair | Grid Pairs | Pct |
|---|---|---|
| 1–10 | — | — |
| 11–100 | — | — |
| 101–1,000 | — | — |
| 1,001–10,000 | — | — |
| 10,001+ | — | — |
Coming soon — requires coverage density histogram query.
Callsign-to-Grid Resolution¶
Grid assignments are resolved via wspr.callsign_grid — a Rosetta Stone
table that maps callsigns to their most-used grid square, built from all
four source datasets. 3.89M verified operators, enriched with PSK Reporter
data which contributed the majority of grid assignments for callsigns not
active on WSPR.
| Source Used for Grid Assignment | Callsigns Resolved |
|---|---|
| WSPR (primary) | — |
| RBN | — |
| PSK Reporter | — |
| Contest | — |
| Total | — |
Coming soon — requires callsign_grid breakdown query.