1. Impact of Earth radiation pressure on GPS position estimates

   • C. J. Rodriguez-Solano
   • U. Hugentobler
   • S. Lutz

   Original Article 13 October 2011 Pages: 309 - 317

2. Simulation study of a follow-on gravity mission to GRACE

   • Bryant D. Loomis
   • R. S. Nerem
   • S. B. Luthcke

   Original Article 28 October 2011 Pages: 319 - 335

3. Estimating geoid height change in North America: past, present and future

   • Thomas Jacob
   • John Wahr
   • Geruo A

   Original Article 01 November 2011 Pages: 337 - 358

4. On weighted total least-squares for geodetic transformations

   • Vahid Mahboub

   Original Article 05 November 2011 Pages: 359 - 367

5. Klaus Peter Schwarz (1938–2012)

   • Helmut Moritz
   • Gérard Lachapelle

   Obituary 01 April 2012 Pages: 369 - 371

6. IAG Newsletter

   • Gyula Tóth

   IAG Newsletter 10 April 2012 Pages: 373 - 374