Links:

IBP

Monitor Stations

Create a Monitor Page

Faros (great software runs on Windows)

SoftRock

Archive

Contact JN1SDD

On the Map New!

World Map

Beacon Reception at JN1SDD by SoftRock and Octave

Reception of the IARU/NCDXF International Beacon Project beacons.

Due to a cooling fan issue of the Linux box, the service is temporary off. Sorry for your inconvenience. (Feb. 23, 2014)

Today, calibrated the internal oscillator of SoftRock. Moved +8 ppm. This is the reason why the plotted squares have been changed to green from blue color. I hope it will increase detecting accuracy. (Sep. 16, 2013)

I'm still making adjustment especially of audio input gain. The shown results may be incorrect. Thank you for your understanding. (Aug. 17, 2013)

For BeaconAid-HF Users: I found that this site has a problem when you visit here by iPhone/iPadd app BeaconAid-HF. I want to fix this, but for a while, please click the button [<< 1 day before] in the page. It will show the graphs. Thank you for your patience. (Mar. 7, 2012)

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

How to build your own: I've started writing article to duplicate my beacon monitor in your site. The article is just started and not completed at all. Thank you for your patience. The article is located here. A Q&A forum was also launched! (Dec. 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: On-board sound. Using 2 channels (I/Q) at 48 kHz sampling rate.

Monitoring System: Original design written from scratch. Implemented by GNU Octave running on Linux PC (Celeron E3300 at 2.5 GHz). (Not kind of running Windows as a virtual machine on Linux.)

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.

Locations of visitors to this page 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

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