Following the article on the radio solar bursts received on the decameter band during last few years by our Sidmonitor website i decided to publish two spectacular geomagnetic pulsations received with Forno ELF Observatory, sited in Forno di Coazze , Torino, Italy . (OPERA Network) For more references you can also see my previous works […]
I decided to publish here, after few years , the most spectacular solar bursts in the decameter band captured by our Sidmonitor (The commemorative website has been moved to http://sidmonitor.rf.gd ) solar spectrometers observatories , now permanently closed. Forno, in the Western Alps and Pasturana, in the plain of Alessandria. The two old live web-pages were […]
This will be the first part of a larger project that will include other friends that have collaborated with me directly or indirectly this last year. It was in many ways, a funny and interesting project to follow. All schematics, codes and results are free for use , please just give references to authors. USE CAUTION […]
Introduction This new project is added to Sidmonitor site , with Claudio Re and others friends , we have developed in last few years. Having Ionograms updated from Cyprus gives a good point of view on current state, the conformation and deformation of the ionosphere caused by natural phenomena such as solar active regions and […]
I’ve tried for fun ,to record with a cheap USB Sound Card, a Radxa Rock Board with a custom kernel (added some audio and USB modules) running Ubuntu Server and the Explorer E202 , some stations in the VLF band. We usually monitor them in Turin observatory for SID correlations (http://sidmonitor.rf.gd/gallery/station.html ) The VLF receiver […]
I Recently found a couple of Lucent RFTG at less than 200$, always on eBay ,from a stock in California. These Redundant Frequency and Time Generator, or RFTG were used in big Cell stations to provide high frequency standards. it’s also available the “yellow tuna” type, the RFG-RB, that is of course more expensive and […]
The Raspberry Pi B 512 MB connected to my “old” Aspire One with a crossover cable If you need precise and accurate time for your projects while sampling a digital record or doing something that need precise timestamps you can use a Raspberry Pi with the Adafruit Breakout GPS module to build a stratum 1 NTP […]
During these days i was searching for something modular and scalable that can gives me a clear PPS ( http://en.wikipedia.org/wiki/Pulse_per_second ) from a GPS satellite with some datas like UTC times.I’ve tested the Arduino UNO board with the Adafruit GPS module. It’s very easy to use them on a little breadboard. The Adafruit GPS is […]
So now we should have our little Unix server running into the WandBoard with SSH running and SFTP of course. Let’s have fun installing NTP client ! First of all we should want have a precise clock. FreeBSD is capable to use NTP protocol as server or client. The protocol is a UDP so it […]
In the previous post I did a quick overview of what I think are two valid alternatives to the common development boards as Raspberry or BeagleBoard. Radxa and Wandboard. Since i would like to use the Wandboard as a little backup server I’ve decided to put inside it FreeBSD 10.1 . So this guide will […]
Delta² 