Research Article
Spline-Based Formulas for the Determination of Equation of Time and Declination Angle
Table 2
Selected points for the 20 knots for EOT and DA.
| | Knot number | EOT (minute) | DA (degree) |
(day no.) | (minute) |
(day no.) |
(degree) |
| | 1 | 1 | −3.4 | 1 | −23.07 | | 2 | 10 | −7.3 | 10 | −22.08 | | 3 | 30 | −13.3 | 30 | −17.88 | | 4 | 50 | −13.9 | 50 | −11.57 | | 5 | 70 | −10.2 | 70 | −4.33 | | 6 | 90 | −4.4 | 90 | 3.53 | | 7 | 110 | 0.9 | 110 | 10.97 | | 8 | 130 | 3.6 | 130 | 17.20 | | 9 | 150 | 2.6 | 150 | 21.52 | | 10 | 170 | −1.1 | 170 | 23.40 | | 11 | 190 | −5.0 | 190 | 22.55 | | 12 | 210 | −6.4 | 210 | 19.13 | | 13 | 230 | −3.9 | 230 | 13.62 | | 14 | 250 | 1.8 | 250 | 6.67 | | 15 | 270 | 8.8 | 270 | −1 | | 16 | 290 | 14.5 | 290 | −8.67 | | 17 | 310 | 16.3 | 310 | −15.50 | | 18 | 330 | 12.9 | 330 | −20.63 | | 19 | 350 | 4.6 | 350 | −23.23 | | 20 | 365 | −2.8 | 365 | −23.20 |
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