Data Acquired: Select year Rx station, TX station  and press "Update"
In the table numbers of daily 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 288 288 288 288 288 276 287 288 288 288 285 286 277 285 280 272 276 277 262 276 279 287 286 283 286 288 286 282 288 284
May 287 285 280 287 286 287 288 287 288 272 281 283 271 276 285 271 283 270 278 274 266 277 284 282 283 284 286 282 286 282 282
June 283 283 273 262 275 285 178 4
July
August
September
October
November
December
Legend: No data Few (<100) Partial (100–199) Good (≥200)