Operator Tools
Log what you hear, with the solar data to explain it.
The propagation journal pairs your on-air observations with real-time NOAA solar indices. Every entry captures the SFI, sunspot number, and Kp index at the moment you were listening, so you can look back and understand why the bands were open or shut.
Solar data and band conditions, together.
Every journal entry captures SFI, sunspot number, and Kp index from NOAA at the moment you log it. Rate conditions from Dead to Excellent, tag the bands and mode, note who you worked, and move on. When you look back, the solar data explains why the bands were open or shut.
- SFI, SSN, and Kp pulled from NOAA and stamped on every entry
- 16 bands from 160m to 23cm, 11 modes including SSB, CW, FT8
- Five-point conditions rating with color-coded journal cards
- Filter by band and mode to spot propagation patterns over time
Capture the full picture.
Every journal entry holds more than a conditions rating. Record contacts, signal reports, regions heard, and which antenna you were using.
Regions Heard
Tag which parts of the world came through: Europe, Japan, South America, or wherever the bands reached. Over time, you will see which openings repeat and when.
Antenna Profiles
Save your antennas with type, height, orientation, and band coverage. Attach one to each entry so you can compare how different setups perform under similar conditions.
Contacts & Signal Reports
Note who you worked, signal strengths, and anything else worth remembering. Freeform text fields let you log as much or as little detail as you want.
Free for every ham.
The propagation journal is a free individual operator tool. No subscription required, no limits. Claim your callsign and start building your propagation history.
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