1. On the asteroid hazard

   • T. M. Eneev
   • R. Z. Akhmetshin
   • G. B. Efimov

   OriginalPaper 01 April 2012 Pages: 93 - 102

2. Concentration of ions in the topside ionosphere as measured onboard the DEMETER satellite: Morphology and dependence on solar and geomagnetic activity

   • V. A. Gladyshev
   • A. Yu. Shchekotov
   • O. A. Molchanov

   OriginalPaper 01 April 2012 Pages: 103 - 115

3. On the belt of energetic electrons at L = 2.75 in the Earth’s magnetosphere

   • Yu. I. Logachev
   • L. L. Lazutin

   OriginalPaper 01 April 2012 Pages: 116 - 123

4. Relationship between the fluxes of relativistic electrons at geosynchronous orbit and the level of ULF activity on the Earth’s surface and in the solar wind during the 23rd solar activity cycle

   • A. S. Potapov
   • B. Tsegmed
   • L. V. Ryzhakova

   OriginalPaper 01 April 2012 Pages: 124 - 140

5. The influence of effects of the heliospheric interface on parameters of backscattered solar Lα radiation measured at the Earth’s orbit

   • O. A. Katushkina
   • V. V. Izmodenov

   OriginalPaper 01 April 2012 Pages: 141 - 151

6. Spherical harmonic series for derivatives of all orders of the gravitational potential of a planet and their application in satellite geodesy and space navigation

   • M. S. Petrovskaya
   • A. N. Vershkov

   OriginalPaper 01 April 2012 Pages: 152 - 159

7. A mechanism of formation of polar cyclones and possibility of their prediction using satellite observations

   • I. V. Mingalev
   • K. G. Orlov
   • V. S. Mingalev

   OriginalPaper 01 April 2012 Pages: 160 - 169

8. Investigation of the effectiveness of an algorithm of active magnetic damping

   • M. Yu. Ovchinnikov
   • V. I. Pen’kov
   • S. O. Karpenko

   OriginalPaper 01 April 2012 Pages: 170 - 176

9. Motion of a descent capsule relative to its center of mass when deploying the orbital tether system

   • Yu. M. Zabolotnov
   • O. N. Naumov

   OriginalPaper 01 April 2012 Pages: 177 - 187

10. Chaotic oscillations of spacecraft with an elastic radially oriented tether

    • V. S. Aslanov
    • A. S. Ledkov

    OriginalPaper 01 April 2012 Pages: 188 - 198

11. Elliptic orbits and satellite constellations for coverage of illuminated areas

    • Yu. P. Ulybyshev

    Short Communications 01 April 2012 Pages: 199 - 202