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26 October

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    | Busteni | Pogana | Yamunanagar TEJLI |

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    The 3 results of the calculation of the circumference are in light red, where is the error?

    Here are the theorical values for 26 october

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    The error in the measurements of the shadows are less than 1cm:

    Pogana: 55.9-55.3=+0.6cm (1.1%)
    Busteni: 108-107=+1.0cm (0.9%)
    Yamunanagar:25-25.8=-0.8cm (3.2%)

    Pogana and Busteni are to close (100km) to expect a good result

    The main causes of error are always
    - error in the verticality of the gnomon
    - error on the time of solar noon