A short history of geophysical radar at Arecibo Observatory by J. D. Mathews

“…As Arecibo Observatory (AO) approaches its 50th anniversary, it is appropriate to review the many radars and ionospheric heaters that have been deployed on or near the 305 m dish and to summarize some of the innovative radar-based geophysical research that has resulted. …”
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Soil metagenome datasets underneath the Arecibo Observatory reflector dish by Miguel G. Rodriguez-Reyes, Carlos Rios-Velazquez

“…The Arecibo Observatory (AO) located in Arecibo, Puerto Rico, is the most sensitive, powerful and active planetary radar system in the world [1]. …”
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Nondetection of CHIME/Fast Radio Burst Sources with the Arecibo Observatory by Deborah C. Good, Pragya Chawla, Emmanuel Fonseca, Victoria Kaspi, B. W. Meyers, Ziggy Pleunis, Ketan R. Sand, Paul Scholz, I. H. Stairs, Shriharsh P. Tendulkar

“…These observations were conducted with the Arecibo Observatory 327 MHz receiver. We detected no additional bursts from these sources, nor did CHIME/FRB detect any additional bursts from these sources during our follow-up program. …”
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Commensal searches for extraterrestrial intelligence with Arecibo Observatory and the Green Bank Telescope by Siemion, A, Armour, W, Chennamangalam, J, Cobb, J, Dexter, M, Falcke, H, Ford, J, Garrett, M, Jones, G, Karastergiou, A, Korpela, E, Lebofsky, M, Lorimer, D, MacMahon, D, Maddalena, R, McLaughlin, M, Werthimer, D

“…Our group is currently developing two new instruments to conduct commensal searches for extraterrestrial intelligence (SETI) at the Green Bank Telescope and Arecibo Observatory. The SETI sky surveys conducted with these two instruments will use all available receivers at these two facilities and target a range of signal types. …”

Survey of electron density changes in the daytime ionosphere over the Arecibo observatory due to lightning and solar flares by Caitano L. da Silva, Sophia D. Salazar, Christiano G. M. Brum, Pedrina Terra

“…The wealth of electron density data acquired over the years by the Arecibo Observatory incoherent scatter radar (ISR) with high vertical spatial resolution (300-m in the present study), combined with its tropical location in a region of high lightning activity, indicate a potentially transformative pathway to address this issue. …”
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The evolution of galaxies through the neutral hydrogen window : Arecibo Observatory, Puerto Rico, 1-3 February, 2008 / by Minchin, Robert, Momjian, Emmanuel

Retrieval of Rotational Temperatures From the Arecibo Observatory Ebert‐Fastie Spectrometer and Their Inter‐Comparison With Co‐Located K‐Lidar and SABER Measurements by Sukanta Sau, Pedrina Terra, Christiano G. M. Brum, Fabio A. Vargas, Jens Lautenbach, S. Gurubaran

“…Abstract Rotational temperatures in the Mesosphere‐Lower Thermosphere region are estimated by utilizing the OH(6,2) Meinel band nightglow data obtained with an Ebert‐Fastie spectrometer (EFS) operated at Arecibo Observatory (AO), Puerto Rico (18.35°N, 66.75°W) during February‐April 2005. …”
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Radio Astronomy by Barrett, Alan H., Burke, Bernard F., Staelin, David H., Spencer, J. H., Murthy, G. T., Price, R. M., Papadopoulos, George D., Papa, D. Cosmo, Crane, Patrick C., Bechis, K. P., Waters, J. W.

Subjects: “…Observations of High-J Atmospheric 0₂ Lines at Arecibo Observatory…”
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Ionospheric Variability over the Brazilian Equatorial Region during the Minima Solar Cycles 1996 and 2009: Comparison between Observational Data and the IRI Model by Ângela M. Santos, Christiano G. M. Brum, Inez S. Batista, José H. A. Sobral, Mangalathayil A. Abdu, Jonas R. Souza, Rodolfo de Jesus, Periasamy K. Manoharan, Pedrina Terra

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Science goals for a high-frequency radar and radio imaging array by Brett Isham, Terence Bullett, Björn Gustavsson, Emil Polisensky, Christiano Brum, Christopher Fallen, Vasyl Belyey, Francisco Parra-Rojas, Leila Norouzi, Arturs Stramkals, Mehmet Baran Ökten

“…Radio imaging is ideal for the study of stimulated ionospheric radio emissions, such as those induced by the Arecibo Observatory high-power HF radio transmitter, which is likely to be restored to operation in the near future. …”
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Severe L-band scintillation over low-to-mid latitudes caused by an extreme equatorial plasma bubble: joint observations from ground-based monitors and GOLD by Jonas Sousasantos, Josemaria Gomez Socola, Fabiano S. Rodrigues, Richard W. Eastes, Christiano G. M. Brum, Pedrina Terra

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Geodetic Precession and the Binary Pulsar B1913+16 by Karastergiou, A, Kramer, M, Wex, N, Hoensbroech, A

“…In this work we extend the previous work by accounting for recent data from the Effelsberg 100-m telescope and Arecibo Observatory and testing model predictions. We demonstrate how the new information will provide additional information on the solutions of the system geometry.…”

A Search for OH 18 cm Emission from Intermediate-velocity Gas at High Galactic Latitudes by Allison J. Smith, D. Anish Roshi

“…We present search results of 22 high-latitude (∣ b ∣ > 25°) sightlines for OH 18 cm emission using the 305 m radio telescope at the Arecibo Observatory. These sightlines appear in neutral hydrogen emission at intermediate velocities −90 ≤ V _LSR ≤ −20 km s ^−1 and are predicted to have a sufficient molecular composition so as to be detectable in molecular emission. …”
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Surface Heterogeneity, Physical, and Shape Model of Near-Earth Asteroid (52768) 1998 OR2 by Maxime Devogèle, Anna McGilvray, Eric MacLennan, Courteney Monchinski, Sean E. Marshall, Dylan Hickson, Anne Virkki, Jon D. Giorgini, Lyu Abe, David Augustin, Amadeo Aznar-Macías, Philippe Baudouin, Raoul Behrend, Philippe Bendjoya, Zouhair Benkhaldoun, Josep Bosch, Alberto Cellino, Joseph Chatelain, Marc Deldem, Marin Ferrais, Rui Goncalves, Gerard Houdin, Marek Husárik, Emmanuel Jehin, Teddy Kareta, Myung-Jin Kim, Javier Licandro, Tim Lister, Hissa Medeiros, Petr Pravec, Jean-Pierre Rivet, Gerald Rousseau, Dong-Goo Roh, Brian Skiff, Patrick A. Taylor, Flaviane Venditti, David Vernet, Jean-Michel Vienney, Hong-Suh Yim, Luisa Zambrano-Marin

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Evaporation of high speed sporadic meteors by E. Murad, C. Roth

“…Recent measurements conducted at the Arecibo Observatory report high-speed sporadic meteors having velocities near 50 km/s. …”
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Long-term lidar observations of the gravity wave activity near the mesopause at Arecibo by X. Yue, X. Yue, J. S. Friedman, Q. Zhou, X. Wu, X. Wu, J. Lautenbach

“…<p>Using 11-year-long K Doppler lidar observations of temperature profiles in the mesosphere and lower thermosphere (MLT) between 85 and 100&thinsp;km, conducted at the Arecibo Observatory, Puerto Rico (18.35<span class="inline-formula">^∘</span>&thinsp;N, 66.75<span class="inline-formula">^∘</span>&thinsp;W), seasonal variations of mean temperature, the squared Brunt–Väisälä frequency, <span class="inline-formula"><i>N</i>²</span>, and the gravity wave potential energy (GWPE) are estimated in a composite year. …”
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Unusual polarimetric properties for interstellar comet 2I/Borisov by S. Bagnulo, A. Cellino, L. Kolokolova, R. Nežič, T. Santana-Ros, G. Borisov, A. A. Christou, Ph. Bendjoya, M. Devogèle

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Arecibo measurements of D-region electron densities during sunset and sunrise: implications for atmospheric composition by C. Baumann, A. Kero, S. Raizada, M. Rapp, M. Rapp, M. P. Sulzer, P. T. Verronen, P. T. Verronen, J. Vierinen

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Radiant measurement accuracy of micrometeors detected by the Arecibo 430 MHz Dual-Beam Radar by D. Janches, D. Janches, M. C. Nolan, M. Sulzer

“…Precise knowledge of the angle between the meteor vector velocity and the radar beam axis is one of the largest source of errors in the Arecibo Observatory (AO) micrometeor observations. In this paper we study ~250 high signal-to-noise ratio (SNR) meteor head-echoes obtained using the dual-beam 430 MHz AO Radar in Puerto Rico, in order to reveal the distribution of this angle. …”
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ALFABURST: a commensal search for fast radio bursts with Arecibo by Foster, G, Karastergiou, A, Golpayegani, G, Surnis, M, Lorimer, DR, Chennamangalam, J, McLaughlin, M, Armour, W, Cobb, J, MacMahon, DHE, Pei, X, Rajwade, K, Siemion, APV, Werthimer, D, Williams, CJ

“…ALFABURST has been searching for fast radio bursts (FRBs) commensally with other projects using the Arecibo L-band Feed Array receiver at the Arecibo Observatory since 2015 July. We describe the observing system and report on the non-detection of any FRBs from that time until 2017 August for a total observing time of 518 h. …”