Copyright, Disclaimer and Privacy Notices

License Creative Commons

© Lionel Loudet 2005-2017, Some Rights Reserved.
Except where otherwise noted, the whole website work is licensed under Creative Commons.

Creative Commons License
SID monitoring station by Lionel LOUDET is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

Use of Data and Products

This site is designed to provide and encourage access to comprehensive information related to Space Weather and especially observations of Sudden Ionospheric Disturbances by monitoring of Very Low Frequency signals.
Information presented on this website is considered public information, unless specifically annotated otherwise. Therefore, the Author places no restrictions on the use or distribution of the data contained therein. However, it is requested that in any subsequent use of this work, the Author be given appropriate acknowledgment. A commercial use of data and information from this site is strictly prohibited.

Note to eternally dissatisfied people and sermonizers:
Yes, the design shown here is neither perfect nor specifically suited to "your" need. This is not a professional making, necessarily limited to the author's financial means and time availability.
This station detects properly SIDs, its stability is satisfactory -- it operates 24/7 since several years. In short, it is OK to me.
Whether you like it or not, whether you find it "too complex" or "too simple", etc., is of no relevance. Criticisms are easy to raise, but they reveal too often misunderstandings or even evident lack of knowledge.
Do not hesitate to improve the design. You are free to design your own station and make it available to the community.


While the Author makes every effort to provide accurate and complete information, various data may contains erroneous or inaccurate information and the website could include technical inaccuracies, and grammatical or typographical errors.
Regarding measurements, documents, schematics and software available from this website, the Author does not warrant or assume any legal liability or responsibility, expressed or implied, for the accuracy, timeliness, completeness, or usefulness of any information, apparatus, product, or process disclosed.
In no event will the Author be liable to you or to any third party for any direct, indirect, incidental, consequential, special or exemplary damages or lost profit resulting from any use or misuse of this data.
The Author welcomes suggestions on how to improve this website and correct errors.

Signal Measurement Data

The signal measurement data is provided as is and has not been consolidated in any manner. It may contain non-flare related deviations to the signal strength. This raw data is affected by noise in the vicinity of the observing station, variations to the ionosphere propagation characteristics not linked with a solar event as well as sudden changes in the transmitting station output power. Visual analysis of the data and correlation with other stations is necessary to validate the detection of an X-ray flare event.

Events List

The events list is provided as is and has not been consolidated in any manner. It can contain false events. Correlation with other stations around the world as well as with satellite X-ray flux measurements is mandatory to confirm the detection of a solar flare event. Please refer to the AAVSO SID program web site or to the NGCD Web Site for a consolidated list of events.


The Author does not endorse or recommend any commercial products, processes, or services.

External Links

Some Web pages on this server may provide links to other Internet sites for the convenience of the users. The Author is not responsible for the availability or content of these external sites, nor does the Author endorse, warrant, or guarantee the relevance, timeliness, or accuracy the products, services, or information described or offered at those other Internet sites. It is the responsibility of the user to examine the copyright and licensing restrictions of linked pages and to secure all necessary permissions.

Pop-Up Advertisements

When visiting our Web site, your Web browser may produce pop-up advertisements. This server does not use advertisement pop-ups. These advertisements were most likely produced by other Web sites you visited or by third party software installed on your computer. The Author does not endorse or recommend products or services for which you may view a pop-up advertisement on your computer screen while visiting this site.

Conditions of Use

For security purposes, and to improve service availability to all users, the Author uses traffic monitoring techniques to identify unauthorized attempts to access, upload or change information or cause any other damage. Unauthorized attempts to access, upload information or change information on this website are strictly prohibited and may be punishable. The Author reserves the right to ban temporarily or definitely some users. In the event of authorized law enforcement investigations and pursuant to any required legal process, information from these sources may be used to help identify an individual.

Last modified June 06, 2013.

Creative Commons License SID monitoring station by Lionel LOUDET is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
Last Update: 05 Jan 2017
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