The Tracking, Occultation and Ranging (TOR) instrument onboard TerraSAR-X and on TanDEM-X. - Markus Rothacher; Byron D. Tapley; Cristoph Reigber; Rolf König; Carsten Falck; Ludwig Grunwaldt; Wolfgang Koehler; Franz-Heinrich Massmann; Grzegorz Michalak (IGARSS, 2007)

REAPER: Reprocessing 12 Years of ERS-1 and ERS-2 Altimeters and Microwave Radiometer Data. - David J. Brockley; Steven Baker 002; Pierre Féménias; Bernat Martinez; Franz-Heinrich Massmann; Michiel Otten; Frédéric Paul; Bruno Picard; Pierre Prandi; Mònica Roca; Sergei Rudenko; Remko Scharroo; et al. (IEEE Trans. Geosci. Remote. Sens., 2017)