Grid GG87 Band Conditions — Rio de Janeiro
Localized HF conditions for Maidenhead locator GG87. Coordinating at -22.50°, -43.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
GG87 conditions are POOR. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 104.
From Sao Paulo state, work the 08:44 UTC and 20:48 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses GG87.
Night operation should keep 20m on watch and move to 40m as the path darkens.
This square sits in South America footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- tropical
- Local phase
- Darkness
- Aurora exposure
- low at this latitude
- Grayline
- 08:44 UTC / 20:48 UTC
- Best high band
- 10m
- Nearest city
- Sao Paulo state
● Local Band Quality Scorings
Use this local score for GG87, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from GG87 — Sao Paulo state
Great-circle distance, short-path beam heading, the bands most likely open right now from GG87 to each DX region at SFI 104 / Kp 0, 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 |
|---|---|---|---|---|
| South America | 1,109 mi | 295° | 40m, 80m, 20m | Open now |
| Southern Africa | 4,302 mi | 109° | 40m, 20m, 80m | Open now |
| North America | 5,538 mi | 320° | 40m, 20m, 80m | Open now |
| Europe | 5,964 mi | 31° | 40m, 20m, 80m | Open now |
| South Asia | 8,690 mi | 78° | 40m, 20m, 80m | Open now |
| Oceania | 8,708 mi | 194° | 10m, 15m, 20m | Open now |
| East Asia / Japan | 11,502 mi | 357° | 10m, 15m, 20m | Open now |
● Band-by-Time Plan for GG87
A planning heuristic for the local day at GG87, built from sunrise 08:44 UTC, sunset 20:48 UTC, SFI 104, and Kp 0. 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.
Modest SFI — 20m is the daytime workhorse here.
20m and 15m carry the daytime load at this SFI.
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 GG87 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in GG87, GG88, GG86, GG97, GG77. 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 GG87, start with 10m POOR, 15m POOR, 20m FAIR and keep 20m available as the safest all-around fallback.
Open contest calendarNearby grids