Grid CH00 Band Conditions
Localized HF conditions for Maidenhead locator CH00. Coordinating at -19.50°, -139.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
CH00 conditions are FAIR. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.
From the CH00 operating area, work the 15:49 UTC and 02:57 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses CH00.
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
- 15:49 UTC / 02:57 UTC
- Best high band
- 10m
- Nearest city
- the CH00 operating area
● Local Band Quality Scorings
Use this local score for CH00, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from CH00 — the CH00 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from CH00 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 |
|---|---|---|---|---|
| Oceania | 4,447 mi | 245° | 10m, 15m, 20m | Open now |
| North America | 4,833 mi | 33° | 10m, 15m, 20m | Open now |
| South America | 5,304 mi | 101° | 10m, 15m, 20m | Open now |
| East Asia / Japan | 6,628 mi | 306° | 10m, 15m, 20m | Open now |
| Southern Africa | 9,136 mi | 162° | 10m, 15m, 20m | Open now |
| Europe | 9,729 mi | 32° | 10m, 15m, 20m | Open now |
| South Asia | 10,046 mi | 281° | 10m, 15m, 20m | Open now |
● Band-by-Time Plan for CH00
A planning heuristic for the local day at CH00, built from sunrise 15:49 UTC, sunset 02:57 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 CH00 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in CH00, CH01, CG09, CH10, BH90. 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 CH00, 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