The shallow subsurface structures of Chang’E-3 landing site based on the wavefield characteristics of LPR Channel-2B data

Zhao, Na; Zhu, Peimin; Yuan, Yuefeng; Zhang, Bingzheng; Deng, Jian

doi:10.1016/j.asr.2018.05.023

Cited by 6 publications

(6 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shallow structure above this layer is further divided based on the radar profile. The homogenous layer with a thickness of~10 m at the top is the regolith with loose materials in the landing zone, which is consistent with the results obtained by LPR channel 2 (Xiao et al, 2015;Zhao et al, 2018). Then, the materials below the top regolith are stratified Em deposits.…”

Section: Shallow Strata In the Radar Profilesupporting

confidence: 87%

“…The data processing methods in this paper mainly include the amplitude compensation for spherical spreading and absorption attenuation, and filtering is performed in the wave number domain and the frequency domain followed by image filtering. The dielectric constants used for the time‐depth conversion are derived from our previous studies on shallow structures (Yuan et al, 2014; Zhao et al, 2018). More details about data processing are shown in the supporting information (Texts S1–S3 and Figures S1–S5).…”

Section: Methodsmentioning

confidence: 99%

“…Based on this principle, we can recognize several distinct strong reflections ( Figure 2) that are always formed on the boundary of different strata. As the CH1 data are not available to map the shallow structures (less than 10 m), the details of this top structure used in this paper are derived from our previous studies on LPR Channel 2B (CH2B) (Zhao et al, 2018). This study further considered the variation in surface relief along the rover path for the depth profile of LPR CH1.…”

Section: Interface Recognitionmentioning

confidence: 99%

See 2 more Smart Citations

New Constraints on the Young Lava Flow Profile in the Northern Mare Imbrium

Yuan

Wang

Zhu

et al. 2020

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

Previous studies showed that the Eratosthenian mare (Em) unit in the northern Mare Imbrium, which is the location of the Chang'e‐3 (CE3) landing site, was simply formed by one period of thick lava flow. However, the CE3 Yutu rover equipped with lunar penetrating radar (LPR) recognized multilayered Em basalts based on the Channel 1 data reprocessed in this paper, indicating that three subdivided thin Eratosthenian lava flows should exist. The spatial variation and thickness distribution of each layer are further estimated based on the location of interfaces recognized from the shallow radar profile. Finally, we build a three‐dimensional stratigraphic model of young mare basalts with filling directions beneath the Chang'e‐3 landing site. The result infers that these young lava flows in the northern Mare Imbrium probably erupted intermittently from the same source.

show abstract

Section: Shallow Strata In the Radar Profilesupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Interface Recognitionmentioning

confidence: 99%

See 1 more Smart Citation

New Constraints on the Young Lava Flow Profile in the Northern Mare Imbrium

Yuan

Wang

Zhu

et al. 2020

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…This provides an excellent opportunity for detection of the structural characteristics and the stacking mode of the lunar regolith, which are critical for understanding the formation process of the lunar regolith. However, in the past, the lunar regolith has usually been assumed to be a uniform layered medium [4][5][6][7][8]. A series of recent studies have shown that the lunar regolith is essentially inhomogeneous [9][10][11][12][13][14][15][16] but the specific structural characteristics of the lunar regolith are still unclear.…”

Section: Introductionmentioning

confidence: 99%

“…Most traditional numerical simulations of LPR data assume layered models [4][5][6][7][8] and cannot well represent the heterogeneity of the lunar regolith. Recently, several works have considered the heterogeneity [9][10][11][12][13][14][15] but do not take typical models into account (e.g., cracks and ejecta).…”

Section: Introductionmentioning

confidence: 99%

Self-Organization Characteristics of Lunar Regolith Inferred by Yutu-2 Lunar Penetrating Radar

Zhang

et al. 2021

Remote Sensing

View full text Add to dashboard Cite

Most previous studies tend to simplify the lunar regolith as a homogeneous medium. However, the lunar regolith is not completely homogeneous, because there are weak reflections from the lunar regolith layer. In this study, we examined the weak heterogeneity of the lunar regolith layer using a self-organization model by matching the reflection pattern of both the lunar regolith layer and the top of the ejecta layer. After a series of numerical experiments, synthetic results show great consistency with the observed Chang’E-4 lunar penetrating radar data and provide some constraints on the range of controlling parameters of the exponential self-organization model. The root mean square permittivity perturbation is estimated to be about 3% and the correlation distance is about 5–10 cm. Additionally, the upper layer of ejecta has about 1–2 rocks per square meter, and the rock diameter is about 20–30 cm. These parameters are helpful for further study of structural characteristics and the evolution process of the lunar regolith. The relatively small correlation distance and root mean square perturbation in the regolith indicate that the regolith is mature. The weak reflections within the regolith are more likely to be due to structural changes rather than material composition changes.

show abstract