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Figure 1: Solar map from NoRH at 17 GHz observed on July 16, 1996, a period of minimum activity. |
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Figure 2: Brightness temperature profile taken across the equatorial region of the map in Fig. 1. The dashed line represents the quiet Sun temperature and the solid line is equal to half of the quiet Sun (limb measurement position). |
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Figure 3: Solar map during the maximum activity period showing the coordinates (crosses) used in the final circumference fit. |
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Figure 4: A running mean taken every 30 days of the mean radius a) and sunspot number b). |
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Figure 5:
Angular variation of the center-to-limb distance as a function of position angle for a mean of 10 maps during periods of a) minimum and b) maximum solar activity. The thick line represents a running mean of 10 points in both panels. In the figure, 90![]() ![]() ![]() ![]() |
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Figure 6: A running mean taken every 30 days of the a) polar radius, b) mean intensities of the brightness temperature above the quiet Sun level at the North pole, and c) sunspot number for the same period. |
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Figure 7: Comparison between a running mean taken every 100 days of the solar radius fit for different deviation criteria, plus the polar radius (as a black line). The criteria are identified in the figure with varying gray scale colors. |
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