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- J. John
- V. Thamarai
- M. M. Mehra
- Teena Choudhary
- M. S. Giridhar
- Ashwini Jambhalikar
- Gogulapati Supriya
- Gaurav Saxena
- B. Ramesh
- T. K. Pratheek
- Deepak Kumar Sharma
- R. Islam
- P. Selvaraj
- A. Kalpana
- S. Ajith Kumar
- K. V. Sriram
- A. S. Laxmiprasad
- R. V. L. N. Sridhar
- Adwaita Goswami
- K. A. Lohar
- M. V. H. Rao
- Monika Mahajan
- Bijoy Raha
- T. S. Smaran
- B. Krishnamprasad
Journals
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Shila, K. V.
- Instrument for Lunar Seismic Activity Studies on Chandrayaan-2 Lander
Abstract Views :1932 |
PDF Views:105
Authors
J. John
1,
V. Thamarai
1,
M. M. Mehra
1,
Teena Choudhary
1,
M. S. Giridhar
1,
Ashwini Jambhalikar
1,
Gogulapati Supriya
1,
Gaurav Saxena
1,
K. V. Shila
1,
B. Ramesh
1,
T. K. Pratheek
1,
Deepak Kumar Sharma
1,
R. Islam
1,
P. Selvaraj
1,
A. Kalpana
1,
S. Ajith Kumar
1,
K. V. Sriram
1,
A. S. Laxmiprasad
1
Affiliations
1 Laboratory for Electro-Optics Systems, Indian Space Research Organisation, Peenya 1st Stage, 1st Cross, Bengaluru 560 058, IN
1 Laboratory for Electro-Optics Systems, Indian Space Research Organisation, Peenya 1st Stage, 1st Cross, Bengaluru 560 058, IN
Source
Current Science, Vol 118, No 3 (2020), Pagination: 376-382Abstract
Instrument for Lunar Seismic Activity Studies (ILSA) is a science payload with the objective of studying seismic activities at the landing site of Vikram, the Lander of Chandrayaan-2. ILSA will be deployed to the lunar surface by a specially built mechanism. It is an indigenously developed instrument based on microelectro mechanical systems technology. High sensitivity silicon micro-machined accelerometer is the heart of the instrument that measures ground acceleration due to lunar quakes. The instrument has the capability of resolving acceleration better than 100 nano-g Hz–1/2 up to a range of 0.5 g over bandwidth of 40 Hz. This paper presents the basic concepts in the design, realization, characterization and the performance test results of the space qualified strong motion seismic sensors.Keywords
Lunar Quakes, MEMS, Seismometer, Strong Motion Sensors.Full Text
References
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- Watters, T. R. et al., Shallow seismic activity and young thrust faults on the Moon. Nature Geosci., 2019, 12, 411–417; https://www.nature.com/articles/s41561-019-0362-2.pdf
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- Laser Induced Breakdown Spectroscope on Chandrayaan-2 Rover:A Miniaturized Mid-UV to Visible Active Spectrometer for Lunar Surface Chemistry Studies
Abstract Views :273 |
PDF Views:104
Authors
A. S. Laxmiprasad
1,
R. V. L. N. Sridhar
1,
Adwaita Goswami
1,
K. A. Lohar
1,
M. V. H. Rao
1,
K. V. Shila
1,
Monika Mahajan
1,
Bijoy Raha
1,
T. S. Smaran
1,
B. Krishnamprasad
1
Affiliations
1 Laboratory for Electro-Optics Systems, Indian Space Research Organisation, Bengaluru 560 058, IN
1 Laboratory for Electro-Optics Systems, Indian Space Research Organisation, Bengaluru 560 058, IN
Source
Current Science, Vol 118, No 4 (2020), Pagination: 573-581Abstract
Laser Induced Breakdown Spectroscope (LIBS) instrument flown in Chandrayaan-2 mission to the Moon, is one of the scientific instruments on the Pragyaan rover. It is primarily developed to carry out in situ investigations for the elemental composition study of lunar regolith and pebbles on the Moon surface in a previously unexplored high latitude area in the southern polar region. A pulsed laser source, a set of optical lenses and mirrors, an aberrationcorrected concave holographic grating and a linear detector, are the principal electro-optical accessories of the instrument. The developed LIBS is a lightweighted (~1.1 kg) and low power consuming (≤1.2 W) compact instrument. This paper presents the system engineering and development aspects of the LIBS instrument along with results from environmental tests. Performance evaluation of the instrument during endto- end testing is satisfactory and within desired specifications. Details on ground calibration techniques used to evaluate the instrument capability are also presented.Keywords
Chandrayaan-2 Mission, Laser-Induced Ablation, Moon, Plasma Emission, Spectroscopy.Full Text
References
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- Laxmiprasad, A. S., Sridhar, Raja V. L. N., Surya Menon, Adwaita Goswami, Rao, M. V. H. and Lohar, K. A., An in situ laser induced breakdown spectroscope (LIBS) for Chandrayaan-2 rover: ablation kinetics and emissivity estimations. Adv. Space Res., 2013, 52, 332–341; http://dx.doi.org/10.1016/j.asr.03.021.
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