The scale of the river to determine the importance of a possible alien signal
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The scale of the river to determine the importance of a possible alien signal

Did you know that there is a scale used by the scientist, which was created during a congress in Rio de Janeiro-Brazil, to determine the importance of a possible alien signal? Almost everyone is familiar with the Richter scale to quantify the severity of the earthquake. Can we also quantify the importance of a SETI candidate signal? The scale of the river is an attempt to do just that. It is an ordinal scale between zero and ten, used to quantify the impact of any public announcement regarding the test of extraterrestrial intelligence. The concept was proposed for the first time in Rio de Janeiro, Brazil (hence its name) by Ivan Almar and Jill Tarter in a document presented at the 51 º International Congress of Astro, 29th meeting of review of the research of Extraterrestrial intelligence, in October 2000. Under his guidance, members of the IAA's SETI committee (and his successor, the IAA Standing Committee) officially adopted the Rio scale in 2002, and continued to work to hone and refine it, in order to bring a certain objectivity In the subjective interpretation of any claimed detection of extraterrestrial intelligence. In many ways, a public announcement of an extraterrestrial intelligence discovery would have social consequences similar to announcing the imminent impact of a large asteroid.  Published in 1997, the so-called Torino scale quantifies the meaning of such a potential threat. The two-dimensional Turin scale takes into consideration both the potential damage of an impact asteroid and the likelihood of this collision with the Earth. The river staircase, described here, is very much based on the design of the Turin scale. Similarly, we try to quantify the relative importance of a rare event, both in terms of potential social impact and the credibility of the evidence presented. A similar metric, the San Marino scale, was recently introduced to quantify the potential danger associated with an active SETI experiment, or another direct transmission from Earth to space. As originally proposed and later refined, the scale of Rio is mathematically defined as:

RS = Q * d

… Where Q, an estimated level of consequences, is the sum of three parameters (class of the phenomenon, type of discovery and distance) and D represents the estimated credibility of a claimed discovery. The value of Q is easily quantified according to the class of the reported phenomenon, the type of discovery and the estimated distance at the source of the detected phenomenon. The value assigned to D is a little more subjective, and is likely to vary over time and between observers. It should be noted that the river Scale is a tool for dynamic analysis rather than static. Throughout the lifetime of any SETI event underway, as the survey is carried out and the researched verification measures, new information is constantly available, affecting our perceptions regarding the importance and credibility of Survey claimed. Therefore, it can be expected that the value of the river scale assigned to any SETI detection will change significantly (up or Down) over time.

River Stair Computer

If you are using a JavaScript-enabled browser, you can follow this link to an interactive river-scale calculator. The radio buttons allow the user to quickly enter details of any (hypothetical or actual) scanned detections. The calculator software then calculates the resulting value of the river scale for the event in the studio.  We invite members of the scientific community and the press to use this tool to estimate the values during the analysis of the SETI events candidates, and to assign the values of the river scale to quantify their estimates of the importance of any Detection of renowned.

Work in progress

The scale of the river continues to be a work in progress. The information presented on this WEB page is intended to be used by members of the IAA Standing Committee only for further development purposes of this research tool. Users should expect this page of the river scale, and the scale calculator of the riverbed, connected by the previous paragraph, to change from time to time, at the discretion of the IAA Permanent Study Group. The current version contained in this document, Revision 1.2, was officially accepted by the IAA Standing Committee in its 2003 meeting in Bremen, pending future revisions at subsequent meetings, and was submitted to the International Astro Academy for formal adoption. Source)

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