Reflectance spectra of analog anorthosites: Implications for lunar highland mapping

Anbazhagan, S.; Arivazhagan, S.

doi:10.1016/j.pss.2009.12.002

Cited by 30 publications

(12 citation statements)

References 14 publications

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“…Though the Sittampundi anorthosite complex is considered as analog test site for lunar highland region in terms of chemistry and mineralogy, the weathering and presence of hydroxyl content in this terrestrial anorthosite may provide slightly different reflectance spectra. The absorptions due to Al-OH and Mg-OH in terrestrial anorthosites show absorption doublets at 2200 nm and 2330 nm (Anbazhagan and Arivazhagan 2010), which may not be prominently shown in the lunar anorthosite spectra. Anbazhagan and Arivazhagan (2010) The True Color Composite generated using the bands 3,2 &1 in red, green, blue filters has given contrast signature for anorthosite has bluish white color.…”

Section: Discussionmentioning

confidence: 89%

“…The absorptions due to Al-OH and Mg-OH in terrestrial anorthosites show absorption doublets at 2200 nm and 2330 nm (Anbazhagan and Arivazhagan 2010), which may not be prominently shown in the lunar anorthosite spectra. Anbazhagan and Arivazhagan (2010) The True Color Composite generated using the bands 3,2 &1 in red, green, blue filters has given contrast signature for anorthosite has bluish white color. The False Color Composite generated with 4, 3 & 2 bands shows similar contrast for anorthosite and enhanced output for pink migmatite.…”

Section: Discussionmentioning

confidence: 89%

“…Anorthosite samples returned from Apollo missions contains >90% Ca-rich plagioclase as well as pyroxene and minor amount olivine, which are iron rich (Heiken et al 1991;Peterson et al 1997). The similarity of the mineralogy and relative percentage of major oxides in Sittampundi anorthsoite is considered as equivalent of lunar highland anorthisitic rock (Anbazhagan and Arivazhagan 2010). The Sittam- Fig.…”

Section: Sittampundi Anorthosite Complexmentioning

confidence: 99%

“…The comparative results of image spectra with field and lab spectra are shown in the Table 2. The spectral characteristics of field and lab spectra were taken from the previous study (Anbazhagan and Arivazhagan 2010). …”

Section: Spectral Analysismentioning

confidence: 99%

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Remote Sensing Study of Sittampundi Anorthosite Complex, India

Anbazhagan

Sainaba

Arivazhagan

2011

J Indian Soc Remote Sens

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In the present study, The Landsat 7 ETM satellite data was collected for the Sittampundi anorthosites complex and digital image analysis was carried out. The anorthositic rocks available at Sittampundi complex is considered as an equivalent of lunar highland rocks. Hence, a remote sensing study comprises of image analysis and spectral profile analysis was carried out. The satellite data was digitally processed and generated various outputs like band combinations, color composites, stretched outputs, and PCA. The suitable processed outputs were identified for delineating the anorthosite complex. The diagnostic absorption features of reflectance spectra are the sensitive indicators of mineralogy and chemical composition of rocks, which are interest to the planetary scientists. The spectral profile of Landsat ETM plotted for pure and mixed anorthosite pixels and compared with the field and lab reflectance spectra. The percentages of image spectra vary from 30% to 60% for Sittampundi anorthosite. The spectral bands 2, 4 and 6 have low reflectance and bands 3 and 5 have high reflectance. The spectral range of bands 2,3,4,5 and 6 are 525 nm-605 nm, 630 nm-690 nm, 750 nm-900 nm, 1550 nm-1750 nm and 10400 nm-12500 nm respectively. The field spectral curve has weak absorptions at 650 nm and 1000 nm due to the iron transition absorption and low ca-pyroxene respectively available in the anorthosite, matching with the image spectra. However, hyperspectal image with narrow bandwidth could be more useful in selecting the suitable spectrum for remotely mapping the anorthosite region, as equivalent test site for lunar highland region.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 89%

Section: Sittampundi Anorthosite Complexmentioning

confidence: 99%

Section: Spectral Analysismentioning

confidence: 99%

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Remote Sensing Study of Sittampundi Anorthosite Complex, India

Anbazhagan

Sainaba

Arivazhagan

2011

J Indian Soc Remote Sens

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“…A similar lunar anorthosite rock bed was identified at Sittampundi and Kunnamalai village [16][17][18] near Salem, Tamil Nadu, India. The Department of Geology, Periyar University, Salem, has done extensive research work on identifying the anorthosite rock bed (Fig.…”

Section: Materials Source and Sample Preparationmentioning

confidence: 84%

Invention of Indian Moon Soil (Lunar Highland Soil Simulant) for Chandrayaan Missions

Venugopal

Muthukkumaran

Sriram

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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Indian Space Research Organization (ISRO) planned the Chandrayaan missions 2 and 3 to explore the South Polar Region of the Moon, which is believed to consist of lunar highland soil. As a part of its moon-landing mission, it is necessary to prepare a "lunar surface terrain testbed" so that the lander and rover could be tested under simulated conditions. This has resulted in a requirement of around 50 tons of lunar soil simulant, which can match with actual lunar highland soil with respect to chemical/mineralogical composition, particle size distribution, and some selected geomechanical properties, including the trafficability parameters, as reported in the literature. Though earlier, some countries (like USA, China, and Canada) have produced limited quantities of lunar highland soil simulants (LHSS), as reported in the literature, there was a compelling need to indigenously manufacture a large amount of lunar soil simulant (LSS) under the policy of "MAKE IN INDIA". This technical note explains the development of a new lunar highland soil simulant LSS-ISAC-1 (that is jointly invented by ISRO Satellite Centre (ISAC) along with

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