If you only have data from two recording stations, you will encounter the following difficulties:
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Limited coverage: With only two recording stations, the geographical coverage of the data will be limited. This means that you will have less information about the event or phenomenon you are studying, which can lead to incomplete or inaccurate conclusions.
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Reduced accuracy: The accuracy of measurements and calculations may be compromised when you have data from only two recording stations. This is because there is less information available to cross-reference and validate the results, increasing the likelihood of errors or inconsistencies.
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Inability to locate the exact position: In some cases, such as determining the epicenter of an earthquake, you may not be able to accurately locate the exact position with only two recording stations. Triangulation methods, which rely on data from multiple sources, are often used to determine precise locations, and having only two data points may not be sufficient for this purpose.