Study of Chang’E-2 Microwave Radiometer Data in the Lunar Polar Region
Joint Authors
Yang, Fan
Xu, Yi
Chan, Kwing Lam
Zhang, Xiaoping
Hu, Guoping
Li, Yong
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-04-24
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The Chang’E-2 (CE-2) four-channel microwave radiometer (MRM) data with frequencies of 3 GHz, 7.8 GHz, 19.35 GHz, and 37 GHz have been used to investigate the properties of lunar surface such as regolith thickness, dielectric constant, and titanium abundance within a depth of several meters in middle and low latitudes.
The purpose of this work is to take a close look at MRM data in the polar regions of the Moon and analyze the characteristics of the brightness temperature (TB) in permanently shadowed regions (PSRs), especially where evidence of water ice has been found.
First, the comparisons of brightness temperature values in the polar region and in low latitudes show that (1) the periodic diurnal (day/night) variation of TB becomes weak in high latitudes since topography plays a dominant role in determining TB in polar region and (2) seasonal effects are more recognizable in polar region than in low latitudes due to the weak illumination condition.
Second, even without direct sun illumination, significant seasonal variations of TBs are observed in PSRs, probably caused by the scattering flux from neighboring topography.
TB Ratio (TBR) between channel 1 and channel 4, which indicates the differences of TB at different depths of lunar regolith, is higher and shows stronger seasonal variation in PSR than regions with direct illumination.
Third, overall the distribution of high TBR values is in consistence with the water ice distributions obtained by the Moon Mineralogy Mapper instrument, the LAMP UV spectra, and the Lunar Prospector Neutron Spectrometer.
The proportion of the summation over area with water ice proof in the regions of interest is 0.89 and 0.56 in south pole and north pole, respectively.
The causes of the correlation of high TBR between different microwave frequencies and stability of water ice deposits still require further investigation, but MRM data shows unique characteristic in PSRs and could provide important information about the upper few meters of lunar regolith.
American Psychological Association (APA)
Yang, Fan& Xu, Yi& Chan, Kwing Lam& Zhang, Xiaoping& Hu, Guoping& Li, Yong. 2019. Study of Chang’E-2 Microwave Radiometer Data in the Lunar Polar Region. Advances in Astronomy،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1114387
Modern Language Association (MLA)
Yang, Fan…[et al.]. Study of Chang’E-2 Microwave Radiometer Data in the Lunar Polar Region. Advances in Astronomy No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1114387
American Medical Association (AMA)
Yang, Fan& Xu, Yi& Chan, Kwing Lam& Zhang, Xiaoping& Hu, Guoping& Li, Yong. Study of Chang’E-2 Microwave Radiometer Data in the Lunar Polar Region. Advances in Astronomy. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1114387
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1114387