Monitor Stations

Create a Monitor Page

Faros (great software runs on Windows)



Contact JN1SDD

On the Map New!

World Map

Beacon Reception at JN1SDD by SoftRock, Octave and Raspberry Pi 2

Reception of the IARU/NCDXF International Beacon Project beacons.

A photo of the new SoftRock receiver board (top) A photo of the new SoftRock receiver board (bottom) A photo of the new SoftRock receiver board evaluation

Beacon Monitor 2 Project: The current (working in progress) outcome of the Beacon Monitor-2 project code is now partially public here (GitHub). Thank you for your additional patience. (Nov. 11, 2017)

Automatic tweeting when an IBP beacon station is heard in Japan. Please be patient that it is still under testing. Please feel free to follow JN1SDD_Beacon. (Jan 31, 2016)

News: Tobias Wellnitz (DH1TW) has kindly introduced my beacon monitor in his web site (or blog). Thank you, Tobias! (Jun. 4, 2010)

Location: Kanagawa pref., Japan. PM95rm, Lat. 35°30' N, Long. 139°25' E

Antenna: 5 meters horizontal wire at 8 meters high. No antenna tuner, coupler or preamp. Maintains one meter distance from a ferroconcrete building (25 meters high).

Receiver: SoftRock v9.0 Lite+USB Xtall with Electronically Switched v9.0 HF BPF. (photo)

Sound Card: Behringer UCA202 (TI PCM2902). Using 2 channels (I/Q) at 16 kHz sampling rate.

Monitoring System: Original design written from scratch. Implemented by GNU Octave running on Raspberry Pi 2 (900 MHz quad-core ARM Cortex-A7).

Other Beacon Monitoring web pages are linked from the International Beacon Project Monitors site. This monitoring site is strongly inspired by Faros the great software which was written by Alex Shovkoplyas, VE3NEA and also using the original representation by Peter Ralph Jennings, VE3SUN. Thank you very much.

HF Propagation and Solar-Terrestrial Data Website

S/N [dB] and Probability

Frequency Bias [ppm]

−5 −3 −1 +1 +3 +5
Put mouse cursor on
the bottom color bar.
Reload every min


Valid HTML 4.01 Transitional Valid CSS! Validated by HTML Validator
Hosted by Atsushi Yokoyama