The 305-meter Arecibo telescope equipped with a 1 MW transmitter at S-band (12.6 cm, 2380 MHz) is used for studies of small bodies in the Solar System, terrestrial planets, and planetary satellites including the Moon.

[6] Researchers: Dr. Periasamy K. Manoharan, Dr. Anna McGilvray, Dr. Benetge Bhakthi Pranama Perera, Dr. Anish Roshi, Dr. Allison Smith, Dr. Sravani Vaddi.

Experiments performed at Arecibo measure upper atmosphere composition, temperature, and densities in order to understand the controlling physical processes.

The Arecibo Radio Telescope can measure the growth and decay of disturbances in the changing layers of charged particles that populate the region known as the ionosphere ( altitudes above 30 miles ).

[7] Researchers: Dr. Christiano Garnett Marques Brum, Dr. Selvaraj Dharmalingam, Dr. Jens Lautenbach, Dr. Shikha Raizada, Dr. Pedrina Terra dos Santos, Dr. Sukanta Sau, Dr. Michael Peter Sulzer.