The RRI file extension is related to the SPEFO a Simple, Yet Powerful Program for One-Dimensional Spectra Processing. The *.rri file stores some kind of stellar spectra analysis data.

There is one other file type using
the RRI file extension!

rri file icon.rri - RealWorld Icon Editor picture image file

Detailed description

Software that works with rri file extension

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RRI file extension - SPEFO Stellar Spectra Analysis file

What is rri file? How to open rri files?

File type specification:

Various data file type icon Various data file type

The RRI file extension is associated with SPEFO, a Simple, Yet Powerful Program for One-Dimensional Spectra Processing, developed at the Astronomical Institute of the Academy of Sciences of the Czech Republic in Ondrejov in 1996.

The RRI files contain stellar spectra analysis data.

The default software associated to rri file type:

SPEFO picture or screenshot

SPEFO  Microsoft MS-DOS software

Company or developer:
  Astronomical Institute of the Academy of Sciences of the Czech Republic

SPEFO is a small, yet powerful program used for processing stellar spectra at the Astronomical Institute of the Academy of Sciences of the Czech Republic in Ondrejov. It was originally written in 1990 by Dr. Jirí Horn for processing spectral plates obtained with the 2m telescope of the Ondrejov observatory and scanned with the local five channel microphotometer. Since then the code had been under constant improvement until the sudden death of the author in December 1994. Currently SPEFO is used mainly for the reduction of data from the Ondrejov Reticon detector (1872 pixels, 12 bit A/D), however it can process data from other instruments too, provided that they are in FITS one-dimensional format.

Help how to open RRI files:

Due the variability and uncertainty of this file type group, there is no general information available, about how to open this various data file format. However most files with extension from this group are usually not meant to be opened or viewed directly. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

For general information try to look at:
Identifying unknown file formats

How to convert file with extension RRI:

Due the variability and uncertainty of this file type group, there is no general information available, about how to convert this various data file format. However most files with extension from this group are usually not in formats, which can be converted. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

List of recommended software applications associated to the .rri file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open rri file, edit rri file, convert rri file, view rri file, play rri file etc. (if exist software for corresponding action in File-Extensions.org's database).

  • Others rri file

Unspecified and all other actions for computer programs working with rri file - SPEFO Stellar Spectra Analysis file

Click on the software link for more information about SPEFO. SPEFO uses rri file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft MS-DOS:

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