SIDmonitor software

SID monitor is a utility for SID monitoring stations. It has been designed to automate as much as possible the data acquisition and storage tasks, so that the user can focus on data analysis.

SID Monitor Software Overview

SID monitor acquires digital data from a VLF receiver. Up to 16 channels can be monitored simultaneously.
Each channel signal level is periodically sampled and stored in a database. To that purpose, SID monitor embeds RRDTool data logging and graphing application. All RRDTool low-level database management and graph generation commands are automatically handled by SID monitor.

RRDTool also includes an aberrant behavior detection algorithm. This feature is currently experimental; the configuration is the algorithm being very delicate. Well configured, this algorithm can be used to warn the user of potential SID detection. Warning messages can be sent by email. It is important to recall that no automaitc event detection is possible. Careful visual analysis of the data is required before generating the report data file.

Monthly snapshots of the database are done.

SIDmonitor also include help for generating monthly reports which format is compliant with the NGDC (National Geophysical Data Center) as required by the AAVSO (American Association of Variable Star Observers) for reducing data gathered by all VLF monitoring systems.

SIDmonitor automatically downloads the X-ray flux measurements from primary and secondary satellites. As a comparison means, those values can be plotted on the signal level graphs.

You can download here the documentation corresponding to the current release of SIDmonitor:

HTML file  SID Monitor Help Online version View SID Monitor Help CHM file
CHM file  SID Monitor Help CHM format Download SID Monitor Help CHM file (application/octet-stream, 972Kb, 24 Apr 2011)
PDF file  SID Monitor Help PDF format Download SID Monitor Help PDF file (application/pdf, 3885Kb, 24 Apr 2011)


System Requirements

SID monitor is a Microsoft .NET application written in C# Visual C#.
It has been compiled on Microsoft Visual Studio Visual Studio C# 2005 Express Edition.
It consists of about 50,000 lines of code.


Basically, any PC can be used. Nominally, in data acquisition mode, CPU requirements are very low and memory usage is about 14 Megs.
Note: Specific functions such as 'Reapply New Algorithm Parameters' are very CPU and memory consuming. In this case, a 2GHz CPU and 512Mb to 1Gb of RAM are welcome, depending of the number of channels being used.

Connection to the analog-to-digital converter (MAX187) is done through a serial (COM) port.
The software has also been tested on a USB-to-serial port converter.


It should run on any Windows platform running Microsoft .NET 2.0. It has successfully been tested on Windows XP SP2 Home Edition, Windows XP SP2 Professional Edition and Windows Server 2003 SP1.

The following software are required:


SID monitor can be installed either manually by downloading binary archives, automatically through an installer or online. Online installation is more intrusive to the system but is easier and it offers automatic updates functionality.

Manual Installation:

Automatic Installation:

Online Installation:

After the installation, it is necessary to configure the application (paths to RRDTool and database folder, channels setup...).
Refer to the help files for more information.

SID monitor uses the Windows registry only for the "Automatic start when user logs" option.
The registry key that is accessed is:
An SID_monitor entry is added if automatic start is enabled.

Download Current Release (

Binary Files

Online Installation

Setup  SID Monitor Online Installation Install SID Monitor

Automatic Installation

Microsoft Installer  SID Monitor Microsoft Installer Download SID Monitor Microsoft Installer (application/octet-stream, 1718Kb, 24 Apr 2011)

Manual Installation

RAR file  SID Monitor Binary File RAR Archive Download SID Monitor Binary RAR Archive (application/octet-stream, 1252Kb, 24 Apr 2011)
ZIP file  SID Monitor Binary File ZIP Archive Download SID Monitor Binary ZIP Archive (application/zip, 1320Kb, 24 Apr 2011)

Source Files

RAR file  SID Monitor Source File RAR Archive Download SID Monitor Source RAR Archive (application/octet-stream, 1656Kb, 24 Apr 2011)
ZIP file  SID Monitor Source File ZIP Archive Download SID Monitor Source ZIP Archive (application/zip, 1703Kb, 24 Apr 2011)

Previous Releases
Creative Commons License SID monitoring station by Lionel LOUDET is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
Last Update: 24 Apr 2011
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