DOI: 10.1002/2013GL058877
论文题名: Surface of Ligeia Mare, Titan, from Cassini altimeter and radiometer analysis
作者: Zebker H. ; Hayes A. ; Janssen M. ; Le Gall A. ; Lorenz R. ; Wye L.
刊名: Geophysical Research Letters
ISSN: 0094-10449
EISSN: 1944-10180
出版年: 2014
卷: 41, 期: 2 起始页码: 308
结束页码: 313
语种: 英语
英文关键词: Composition
; Lakes and seas
; Surface temperature
; Titan
; Wind fields
Scopus关键词: Atmospheric temperature
; Chemical analysis
; Methane
; Radiometry
; Liquid hydrocarbons
; Physical temperature
; Radar observations
; Radiometer analysis
; Significant surfaces
; Surface temperatures
; Titan
; Wind field
; Radar
; echo sounding
; methane
; nadir
; radiometric survey
; satellite altimetry
; surface temperature
; surface wave
; terrain
; Titan
; wind field
英文摘要: Cassini radar observations of the surface of Ligeia Mare collected during the 23 May 2013 (T91) Cassini flyby show that it is extremely smooth, likely to be mostly methane in composition, and exhibits no surface wave activity. The radar parameters were tuned for nadir-looking geometry of liquid surfaces, using experience from Cassini's only comparable observation, of Ontario Lacus on 21 December 2008 (T49), and also include coincident radiometric observations. Radar echoes from both passes show very strong specular radar reflections and limit surface height variations to 1 mm rms. The surface physical temperature at 80°N is 92 +/- 0.5 K if the sea is liquid hydrocarbon and the land is solid hydrocarbon, essentially the same as Cassini CIRS measurements. Furthermore, radiometry measurements over the surrounding terrain suggest dielectric constants from 2.2 to 2.4, arguing against significant surface water ice unless it is extremely porous. ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893196632&doi=10.1002%2f2013GL058877&partnerID=40&md5=aa47b7d6d4c2efc1031baec9c892ff6f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7713
Appears in Collections: 气候减缓与适应
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作者单位: Departments of Geophysics and Electrical Engineering, Stanford University, Stanford, CA, United States
Recommended Citation:
Zebker H.,Hayes A.,Janssen M.,et al. Surface of Ligeia Mare, Titan, from Cassini altimeter and radiometer analysis[J]. Geophysical Research Letters,2014-01-01,41(2).