| UWA | ABY | Aberystwyth, United Kingdom | 51.8580 | -4.2520 | Not Active | EARLINET | | | | |
| National Observatory of Athens – NOA | AKY | Antikythera, Greece | 35.8600 | 23.3100 | Active | EARLINET | Vassilis Amiridis | Vassilis Amiridis | Eleni Marinou | Alexandra Tsekeri; Anna Gialitaki; Dimitra Kouklaki; Ioanna Tsikoudi; Kalliopi Voudouri; Maria Tsichla; Peristera Paschou |
| ALOMAR/Andøya Space Center | ARR | Andøya, Norway | 69.2780 | 16.0080 | Active | EARLINET | Martin Fluegge | Martin Fluegge | Kolbjørn Blix | Arild Danielsen; Kalliopi Voudouri; Mathilde Carbonnel |
| National Technical University of Athens, Physics Department | ATZ | Athens, Greece | 37.9600 | 23.7800 | Active | EARLINET | Alexandros Papayannis | Alexandros Papayannis | | Eleni Kralli; Marilena Gidarakou |
| Universitat Politecnica de Catalunya, Barcelona | BRC | Barcelona, Spain | 41.3930 | 2.1200 | Active | ACTRIS (planned); EARLINET | Constantino Muñoz-Porcar | Constantino Muñoz-Porcar | Alejandro Rodriguez | Adolfo Comeron; Cristina Gil-Díaz; Daniel Camilo Fortunato dos Santos Oliveira; Federico Dios; Francesc Rocadenbosch |
| Institute of Geophysics, Polish Academy of Sciences, Warsaw | COG | Belsk, Poland | 51.8300 | 20.7800 | Active | ACTRIS (planned); EARLINET | Aleksander Pietruczuk | Aleksander Pietruczuk | | |
| IPB – Institute of Physics Belgrade | BGD | Belgrade, Serbia | 44.8557 | 20.3913 | Active | EARLINET | Zoran Mijic | Zoran Mijic | Luka Ilic; Maja Kuzmanoski | |
| Universitat de València | BUJ | Burjassot, Spain | 39.5000 | -0.4200 | Joining | EARLINET | José Luis Gómez Amo | José Luis Gómez Amo | | Pedro Catalán Valdelomar |
| National Institute of R&D for Optoelectronics (INOE) | INO | Bucharest, Romania | 44.3480 | 26.0290 | Active | ACTRIS (planned); EARLINET | Doina Nicolae | Doina Nicolae | Livio Belegante | Alexandru Dandocsi; Camelia Talianu; Gabriela Ciocan; Razvan Pirloaga; Stefan Nicolae; Victor Nicolae |
| KNMI – Royal Netherlands Meteorological Institute | CBW | Cabauw, Netherlands | 51.9700 | 4.9300 | Active | ACTRIS (planned); EARLINET | Arnoud Apituley | Arnoud Apituley | | Dave Donovan; Diego Gouveia |
| Babes-Bolyai University of Cluj Napoca | CLJ | Cluj-Napoca, Romania | 46.7682 | 23.5509 | Active | ACTRIS (planned); EARLINET | Nicolae Ajtai | Nicolae Ajtai | Horatiu Stefanie | Andrei Radovici |
| Observatoire de Physique du Globle (OPGC-LaMP) | PUY | Clermont-Ferrand, France | 45.7610 | 3.1110 | Active | ACTRIS (planned); EARLINET | Patrick Freville | Patrick Freville | Jean-Luc Baray | Nadege Montoux |
| Phys. Dep. and Env. Res. Institute, University College Cork | UCC | Cork, Ireland | 51.8933 | -8.4942 | Not Active | EARLINET | Albert A. Ruth | Albert A. Ruth | Karen Acheson | |
| CNISM, INGV, INAF | CTN | Astrophysical Laboratory Catania, Italy | 37.5100 | 15.0800 | Temporary | EARLINET | Simona Scollo | Simona Scollo | Antonella Boselli | Giuseppe Leto; Salvo Consoli |
| Leibniz Institute for Tropospheric Research, Leipzig | DUS | Dushanbe, Tajikistan | 38.5594 | 68.8561 | Active | ACTRIS (planned); EARLINET | Ronny Engelmann | Ronny Engelmann | Holger Baars | Julian Hofer; Ulla Wandinger |
| Institute for Earth Sciences(ICT-Instituto de Ciencias da Terra) | EVO | Evora, Portugal | 38.5678 | -7.9115 | Active | EARLINET | Daniele Bortoli | Daniele Bortoli | | Maria João Costa ; Miguel Potes; Vanda Salgueiro |
| Karlsruher Institut für Technologie, KIT, Garmisch-Partenkirchen | GAR | Garmisch-Partenkirchen, Germany | 47.4770 | 11.0640 | Not Active | ACTRIS (planned); EARLINET | Hannes Vogelmann | Hannes Vogelmann | | Thomas Trickl |
| Andalusian Institute for Earth System Research, University of Granada(IISTA-CEAMA) | GRA | Granada, Spain | 37.1640 | -3.6050 | Active | ACTRIS (planned); EARLINET | Lucas Alados Arboledas | Lucas Alados Arboledas | Juan Luis Guerrero Rascado | Ana del Águila Pérez; Arlett Díaz Zurita; Francisco Navas Guzman; Jesús Abril Gago; Jorge Muñiz Rosado; Juana Andújar Maqueda; Juan Antonio Bravo Aranda; María José Granados Muñoz; María Soledad Fernández Carvelo; Pablo Ortiz Amezcua |
| Max-Planck-Institut für Meteorologie | HBB | Hamburg-Bergedorf, Germany | 53.4800 | 10.2410 | Not Active | EARLINET | Jens Boesenberg | Jens Boesenberg | | Stefan Kinne |
| Max-Planck-Institut für Meteorologie | HBU | Hamburg, Germany | 53.5680 | 9.9730 | Not Active | EARLINET | Jens Boesenberg | Jens Boesenberg | | Ilja Serikov; Stefan Kinne |
| Observatoire de Haute Provence, St Michel | OHP | Haute-Provence, France | 43.9000 | 5.7000 | Not Active | ACTRIS (planned); EARLINET | Christophe Pietras | Christophe Pietras | | Philippe Keckhut |
| Joint Research Centre – Directorate for Energy, Mobilty, and Climate, Ispra, Italy | IPR | Ispra, Italy | 45.8167 | 8.6167 | Active | ACTRIS (planned); EARLINET | Jean-Philippe Putaud | Jean-Philippe Putaud | | |
| EPFL (Ecole Polytechnique Federale de Lausanne) | JFJ | Jungfraujoch, Switzerland | 46.5481 | 7.9839 | Not Active | EARLINET | Valentin Simeonov | Valentin Simeonov | | |
| IAP | KUH | Kuehlungsborn, Germany | 54.1200 | 11.7700 | Not Active | EARLINET | | | | |
| Finnish Meteorological Institute (FMI), Atmospheric Research Centre of Eastern Finland, Kuopio | KUO | Kuopio, Finland | 62.7333 | 27.5500 | Active | EARLINET | Mika Komppula | Mika Komppula | | Elina Giannakaki; Maria Filioglou; Xiaoxia Shang |
| Università degli Studi dell’Aquila – Dipartimento di Fisica – CETEMPS, L’Aquila | LAQ | L’Aquila, Italy | 42.3440 | 13.3270 | Active | ACTRIS (planned); EARLINET | Vincenzo Rizi | Vincenzo Rizi | Marco Iarlori | |
| University of Salento, Physics Department, Lecce | SAL | Lecce, Italy | 40.3330 | 18.1000 | Active | ACTRIS (planned); EARLINET | Maria Rita Perrone | Maria Rita Perrone | Salvatore Romano | Lucio Calcagnile |
| Leibniz Institute for Tropospheric Research, Leipzig | LEI | Leipzig, Germany | 51.3500 | 12.4330 | Active | ACTRIS (planned); EARLINET | Holger Baars | Holger Baars | Ronny Engelmann | Annett Skupin; Athena Floutsi; Birgit Heese; Cristofer Jimenez; Dietrich Althausen; Dimitri Trapon; Finja Baumer; Georg Müller; Julian Hofer; Martin Radenz; Ulla Wandinger |
| IST – Técnico Lisboa | LIS | Lisbon, Portugal | 38.7200 | -9.1500 | Not Active | EARLINET | | | | |
| Swedish Defence Research Agency | LKP | Linkoping, Sweden | 58.3920 | 15.5750 | Not Active | EARLINET | Ove Gustafsson | Ove Gustafsson | | Julia Hedborg |
| Lille 1 University – Science and Technology | LLE | Lille, France | 50.6117 | 3.1417 | Active | ACTRIS (planned); EARLINET | Philippe Goloub | Philippe Goloub | Thierry Podvin | Eric Bourrianne; Gaël Dubois; Qiaoyun Hu |
| ERATOSTHENES Centre of Excellence and Cyprus University of Technology | LIM | Limassol, Cyprus | 34.6771 | 33.0376 | Active | ACTRIS (planned); EARLINET | Rodanthi-Elisavet Mamouri | Rodanthi-Elisavet Mamouri | Argyro Nisantzi | Athina Savva; Maria Poutli |
| ENEA | LMP | Lampedusa, Italy | 35.5200 | 12.6300 | Joining | ACTRIS (planned); EARLINET | Tatiana Di Iorio | Tatiana Di Iorio | Alcide Giorgio di Sarra | |
| CIEMAT (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas), Madrid | MDR | Madrid, Spain | 40.4565 | -3.7257 | Active | ACTRIS (planned); EARLINET | Manuel Pujadas | Manuel Pujadas | | Francisco Molero Menéndez; Ruben Barragán |
| Leibniz Institute for Tropospheric Research, Leipzig | MEL | Melpitz, Germany | 51.5300 | 12.9300 | Temporary | EARLINET | Birgit Heese | Birgit Heese | Ronny Engelmann | Annett Skupin; Holger Baars |
| B.I. Stepanov Institute of Physiscs, Minsk | MAS | Minsk, Belarus | 53.9170 | 27.6050 | Active | | Anatoly Chaikovsky | Anatoly Chaikovsky | | |
| Meteorologisches Institut der Ludwig-Maximilians-Universität, München | MUC | Maisach, Germany | 48.2090 | 11.2580 | Not Active | EARLINET | | | | Carlos Toledano; Josef Gasteiger; Silke Gross; Volker Freudenthaler |
| Meteorological Institute Munich (MIM), LMU | MUN | Munich, Germany | 48.1500 | 11.5700 | Not Active | ACTRIS (planned); EARLINET | Volker Freudenthaler | Volker Freudenthaler | Nikos Siomos | Alexander Geiß (Geiss); Maria Mylonaki; Michi Haimerl; Stefan Kneifel |
| Dipartimento di Fisica “Ettore Pancini” dell’Università degli studi di Napoli Federico II | NAP | Naples, Italy | 40.8380 | 14.1830 | Active | ACTRIS (planned); EARLINET | Salvatore Amoruso | Salvatore Amoruso | Antonella Boselli | Alessia Sannino; Riccardo Damiano |
| Observatory of Neuchatel | NEU | Neuchatel, Switzerland | 47.0017 | 6.9546 | Not Active | EARLINET | Valentin Mitev | Valentin Mitev | | |
| CNISM, INAF, INGV | NCL | Nicolosi, Serra La Nave Observatory, Italy | 37.6900 | 14.9700 | Temporary | EARLINET | Giuseppe Leto | Giuseppe Leto | Antonella Boselli | Ricardo Zanmar Sanchez; Simona Scollo |
| DWD Meteorological Observatory Hohenpeissenberg | HPB | Observatory Hohenpeissenberg, Germany | 47.8019 | 11.0119 | Active | EARLINET | Ina Mattis | Ina Mattis | Frank Wagner | Werner Thomas |
| Centre National de la Recherche Scientifique – Institut Pierre Simon Laplace, Paris | SIR | Palaiseau, France | 48.7130 | 2.2080 | Active | ACTRIS (planned); EARLINET | Christophe Pietras | Christophe Pietras | | Martial Haeffelin |
| Consiglio Nazionale delle Ricerche – Istituto di Metodologie per l’Analisi Ambientale (CNR-IMAA), Potenza | POT | Potenza, Italy | 40.6000 | 15.7200 | Active | ACTRIS (planned); EARLINET | Aldo Amodeo | Aldo Amodeo | Nikolaos Papagiannopoulos | Aldo Giunta; Benedetto de Rosa; Canio Colangelo; Christina Anna Papanikolaou; Claudio Dema; Donato Summa; Ermann Ripepi; Francesco Amato; Gelsomina Pappalardo; Giuseppe D’Amico; Lucia Mona; Marco Rosoldi; Michail Mytilinaios; Michele Volini; Pilar Gumà-Claramunt |
| MeteoSwiss Aerological Station of Payerne – University of Bern, Switzerland | PAY | Payerne, Switzerland | 46.8167 | 6.9333 | Active | ACTRIS (planned); EARLINET | Giovanni Martucci; Renaud Matthey | Giovanni Martucci; Renaud Matthey | Giovanni Martucci | Alexander Haefele; Martine Collaud |
| Consiglio Nazionale delle Ricerche – Istituto di Scienze Marine | RME | Roma-Tor Vergata, Italy | 41.8330 | 12.6500 | Active | ACTRIS (planned); EARLINET | Davide Dionisi | Davide Dionisi | Gian Luigi Liberti | Giovanni Giuliano; Lorenza Masi; Marco Di Paolantonio |
| Institute of Electronics, Bulgarian Academy of Sciences, Sofia | SOF | Sofia, Bulgaria | 42.6500 | 23.3800 | Active | ACTRIS (planned); EARLINET | Zahari Peshev | Zahari Peshev | Ivan Grigorov | Eleonora Toncheva; Krum Shumanov; Liliya Vulkova; Lyubomir Popov; Stefan Dosev; Tanja Dreischuh; Tsvetina Evgenieva |
| Research Park of Saint-Petersburg State University – Observatory of environmental safety | SPL | St. Petersburg, Russia | 59.9427 | 30.2730 | Active | | Dmitry Samulenkov | Dmitry Samulenkov | | |
| Aristotle University of Thessaloniki, Thessaloniki | THE | Thessaloniki, Greece | 40.6300 | 22.9500 | Active | EARLINET | Dimitris Balis | Dimitris Balis | Kalliopi Voudouri | Georgia Peletidou; Konstantinos Michailidis |
| University of Warsaw, Faculty of Physics | WAW | Warsaw, Poland | 52.2100 | 20.9800 | Active | ACTRIS (planned); EARLINET | Iwona S. Stachlewska | Iwona S. Stachlewska | Dominika Szczepanik | Lucja Janicka |
| ERATOSTHENES Centre of Excellence and Leibniz Institute for Tropospheric Research | CYC | Limassol, Cyprus | 34.6771 | 33.0376 | Active | ACTRIS (planned); EARLINET | Holger Baars; Rodanthi-Elisavet Mamouri | Holger Baars; Rodanthi-Elisavet Mamouri | Argyro Nisantzi | Athina Savva; Maria Poutli; Ronny Engelmann |
| Karlsruher Institut für Technologie, KIT, Garmisch-Partenkirchen | GAP | Garmisch-Partenkirchen-Zugspitze, Germany | 47.4167 | 10.9797 | Joining | ACTRIS (planned); EARLINET | Hannes Vogelmann | Hannes Vogelmann | Thomas Trickl | |
| The Cyprus Institute (Cyl) | NCS | Cyprus CAO Nicosia, Cyprus | 35.1410 | 33.3810 | Temporary | EARLINET | Franco Marenco | Franco Marenco | Alkistis Papetta | |
| Leibniz Institute for Tropospheric Research, Leipzig | CVO | Mindelo, Capo Verde | 16.8778 | -24.9954 | Temporary | ACTRIS (planned); EARLINET | Skupin Annett | Skupin Annett | Holger Baars | |
| French National Centre for Scientific Research (CNRS) – University of Reunion Island | RUN | Observatoire de Physique de l’Atmosphère de La Réunion (OPAR), Saint-Denis site, La Reunion, France | -20.9020 | 55.4850 | Active | ACTRIS (planned); EARLINET | Michael Sicard | Michael Sicard | | Dominique Gantois; El Hassan Bencherif; Guillaume Payen; Nelson Begue |
| Institute of Atmospheric Sciences and Climate (CNR-ISAC) | SPC | San Pietro Capofiume, Italy | 44.6538 | 11.6228 | Temporary | ACTRIS (planned); EARLINET | Luca di Liberto | Luca di Liberto | Angelo Lupi | |
| Leibniz Institute for Tropospheric Research, Leipzig | LAC | Mobile Station LACROS | 47.0800 | 7.8500 | Temporary | ACTRIS (planned); EARLINET | Patric Seifert | Patric Seifert | Holger Baars | Andi Klamt; Annett Skupin; Birgit Heese; Cristofer Jimenez; Dietrich Althausen; Julian Hofer; Kevin Ohneiser; Martin Radenz; Moritz Haarig |
| Leibniz Institute for Tropospheric Research, Leipzig | ARI | Mobile Station OCEANET | 51.2100 | 12.2600 | Active | ACTRIS (planned); EARLINET | Ronny Engelmann | Ronny Engelmann | Holger Baars | Andi Klamt; Annett Skupin; Birgit Heese; Cristofer Jimenez; Dietrich Althausen; Julian Hofer; Kevin Ohneiser; Martin Radenz; Moritz Haarig |
| National Centre for Atmospheric Science (NCAS) | CBN | Chilboton, United Kingdom | 51.1450 | -1.4390 | Joining | EARLINET | Chris Walden | Chris Walden | Hugo Ricketts | |
| Czech Hydrometeorological Institute (CHMI), Kosetice National Atmospheric Observatory Kosetice (NAOK), Czech Republic | NAK | Kosetice, Czechia | 49.5733 | 15.0803 | Joining | ACTRIS (planned); EARLINET | Adriana Šindelárová | Adriana Šindelárová | Adéla Holubová Smejkalova | |
| University of Silesia in Katowice | SOS | Sosnowiec, Poland | 50.2998 | 19.1341 | Joining | EARLINET | Anna Abramowicz | Anna Abramowicz | Mariola Jablonska | Miroslaw Szczyrba |
| University of Wroclaw (Department of Climatology and Atmosphere Protection) | WRC | Wroclaw, Poland | 51.1053 | 17.0889 | Joining | | Anetta Drzeniecka-Osiadacz | Anetta Drzeniecka-Osiadacz | Aleksandra Walkowicz; Tymoteusz Sawinski | |
