Data Acquired: Select year Rx station, TX station  and press "Update"
In the table numbers of acquired oblique ionogramms (max 288 for 5 min. ionograms step).

Month\Day 12345678910111213141516171819202122232425262728293031
January 288 287 273 283 98 173 288 288 288 288 288 288 260 189 288 288 288 288 287 288 288 288 288 288 217 260 245 288 287 288
February 281 288 288 288 288 288 288 288 288 288 288 285 204 288 288 287 288 288 288 288 288 288 288 288 288 287 288 288
March 284 288 288 288 288 288 288 281 288 283 287 282 281 274 287 287 287 288 285 287 281 275 280 288 288 281 286 286 288 288 285
April 288 288 288 288 288 276 287 288 288 288 285 286 277 285 280 272 276 277 262 276 279 287 117
May
June
July
August
September
October
November
December
Legend: No data Few (<100) Partial (100–199) Good (≥200)