ANNALS OF GEOPHYSICS, 56, Fast Track-1, 2013; 10.4401/ag-6333 Results of the preparat- ory study “PREMIER Analysis of Campaign Data” ELISA CASTELLI 1, *, SAMUELE DEL BIANCO 2 , BIANCA M. DINELLI 1 , DANIEL GERBER 3 , HERMANN OELHAF 4 , WOLFGANG WOIWODE 4 , BÄRBEL VOGEL 5 , BJÖRN-MARTIN SINNHUBER 4 , ROLAND RUHNKE 4 , UGO CORTESI 2 1 Istituto di Scienze dell’Atmosfera e del Clima del Consiglio Nazionale delle Ricerche (ISAC-CNR), Bologna, Italy, 2 Istituto di Fisica Applicata “N. Carrara” del Consiglio Na- zionale delle Ricerche (IFAC-CNR), Firenze, Italy, 3 Rutherford Appleton Laboratory (STFC-RAL), Chilton, UK, 4 Institute for Meteorology and Climate Research (IMK-ASF), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germa- ny, 5 Institute for Energy and Climate Research - Stratosphere (IEK-7), Forschungszentrum Jülich GmbH (FZJ), Jülich, Ger- many e.castelli@isac.cnr.it I. INTRODUCTION he relevance of the UTLS (Upper Tropo- sphere and Lower Stratosphere) region and the impact of limb emission measurements at millimetre and sub-millimetre wavelengths for investigation of chemical, dynamical and radiative processes occurring at these altitudes constitute a major focus of the atmospheric re- T * Corresponding author: Elisa Castelli, Istituto di Scienze dell’Atmosfera e del Clima (ISAC-CNR), Bologna, Italy, email: e.castelli@isac.cnr.it search activities supported by the European Space Agency (ESA) in the last two decades. Since the end of the 1990’s, several studies were conducted on this topic, like those related to the design of the SOPRANO (Submillimetre- wave Observations of PRocesses in the Atmo- sphere Noteworthy for Ozone) and MASTER (Millimetre-wave Acquisitions for Strato- sphere/Troposphere Exchange) instruments [Bühler, 1999], the latter originally conceived for the ESA Explorer mission ACECHEM (At- mospheric Composition Explorer for CHEM- 1