Journal Article

Dual-spacecraft radio occultation measurement of the electron density near the lunar surface by the SELENE mission

Hanada, H., Matsumoto, K., Liu, Q., Saito, A., Iwata, T., Noda, H., Oyama, K.-I., Futaana, Y., Mochizuki, N., Imamura, T., Yamamoto, Z., Nabatov, A., Ando, H., Kono, Y.

2012

Overview

During the SELENE (Kaguya) mission the dual‐spacecraft radio occultation technique was used to investigate the electron population in the vicinity of the lunar surface. One pair of coherent S‐band radio signals from one spacecraft was used to probe the possible electron density enhancement near the Moon, and another signal pair from the other spacecraft measured the solar wind and the terrestrial ionosphere plasma fluctuations, which also exist in the measurement by the former signal pair. The results suggest that any stable ionosphere with densities comparable to the ones observed by the Soviet Luna 19 and 22 missions does not exist near the terminator at high latitudes, although the occurrence of temporal or localized density enhancements cannot be ruled out. Key Points We measured the electron density around the moon by the dual‐spacecraft method Dual‐spacecraft technique can remove the effects of the earth ionosphere Lunar ionosphere can appear temporally, which is associated with the lunar dust

• Publisher: Blackwell Publishing Ltd,American Geophysical Union (AGU),American Geophysical Union
• Subject: Earth sciences / Earth, ocean, space / Exact sciences and technology / Ionosphere / lunar ionosphere / Moon / Planetology / Planets / radio occultation / Radios / SELENE / Spacecraft