Grid RK91 Band Conditions
Localized HF conditions for Maidenhead locator RK91. Coordinating at 11.50°, 179.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
RK91 conditions are FAIR. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.
From the RK91 operating area, work the 17:50 UTC and 06:32 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses RK91.
10m is the headline band right now, with 20m as the dependable fallback if conditions soften.
This square sits in a mixed-region footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- tropical
- Local phase
- Daylight
- Aurora exposure
- low at this latitude
- Grayline
- 17:50 UTC / 06:32 UTC
- Best high band
- 10m
- Nearest city
- the RK91 operating area
● Local Band Quality Scorings
Use this local score for RK91, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from RK91 — the RK91 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from RK91 to each DX region at SFI 137 / Kp 3, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.
| Target | Distance | Beam | Bands to try | Status |
|---|---|---|---|---|
| East Asia / Japan | 3,062 mi | 311° | 10m, 15m, 20m | Open now |
| Oceania | 3,456 mi | 213° | 10m, 15m, 20m | Open now |
| North America | 5,347 mi | 52° | 10m, 15m, 20m | Open now |
| South Asia | 6,610 mi | 294° | 10m, 15m, 20m | Open now |
| Europe | 8,136 mi | 352° | 10m, 15m, 20m | Open now |
| South America | 8,606 mi | 100° | 40m, 20m, 80m | Open now |
| Southern Africa | 10,413 mi | 237° | 10m, 15m, 20m | Open now |
● Band-by-Time Plan for RK91
A planning heuristic for the local day at RK91, built from sunrise 17:50 UTC, sunset 06:32 UTC, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.
Grayline enhancement — low bands reach long distances as the terminator passes.
High bands rising with the sun; check 10m for DX.
Peak high-band window — 10m and 15m open widest.
Second grayline peak — 20m holds, then hands off to 40m.
Low bands own the darkness — 40m for DX, 80m regional.
Recent local activity
Spots touching RK91 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in RK91, RK92, RK90, AK01, RK81. This gives the page unique, local context instead of a generic solar snapshot.
Top DX targets
Where this grid is reaching right now
Contest preview
Next major contest outlook
No contest event is currently loaded. For planning from RK91, start with 10m EXCELLENT, 15m EXCELLENT, 20m GOOD and keep 20m available as the safest all-around fallback.
Open contest calendarNearby grids
Four adjacent squares for internal path checking
Regional hub links