Mathematical Problems in Engineering / 2012 / Article / Fig 1

Research Article

Assessment of the Ionospheric and Tropospheric Effects in Location Errors of Data Collection Platforms in Equatorial Region during High and Low Solar Activity Periods

Figure 1

Sunspot numbers of cycle 23 and beginning of cycle 24. The daily (yellow), monthly (blue), and monthly smoothed (red) sunspot numbers since 2000, together with predictions for 12 months ahead: SM (red dots): classical prediction method, based on an interpolation of Waldmeier’s standard curves; CM (red dashes): combined method proposed by K. Denkmayr. Source:—Access in October 2011.

We are committed to sharing findings related to COVID-19 as quickly as possible. We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. Review articles are excluded from this waiver policy. Sign up here as a reviewer to help fast-track new submissions.