1. Evaluation of analytical ionospheric models used in electron density profile reconstruction

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   OriginalPaper 27 February 2013 Pages: 385 - 401

2. Some results referring to the long-term change of ionospheric parameters

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   OriginalPaper 27 February 2013 Pages: 403 - 408

3. On the origin of mid-latitude spread-F

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   • P. Bakki

   OriginalPaper 27 February 2013 Pages: 409 - 417

4. Spectrum utilisation, spectrum management and COST271

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   OriginalPaper 27 February 2013 Pages: 419 - 423

5. Gravity gradiometry: From Loránd Eötvös to modern space age

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   OriginalPaper 27 February 2013 Pages: 435 - 444

6. Geomagnetic research in the 19th century

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   • K. -H. Wiederkehr

   OriginalPaper 27 February 2013 Pages: 445 - 466

7. Ferenc Steiner is 70 years old curriculum vitae

   Announcement 27 February 2013 Pages: 467 - 477