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- Anil Bhardwaj
- S. V. Mohankumar
- Tirtha Pratim Das
- P. Pradeepkumar
- P. Sreelatha
- B. Sundar
- Dinakar Prasad Vajja
- M. B. Dhanya
- Neha Naik
- G. Supriya
- R. Satheesh Thampi
- G. Padma Padmanabhan
- Vipin K. Yadav
- A. V. Aliyas
- Smitha V. Thampi
- J. K. Abhishek
- Md. Nazeer
- P. T. Lali
- Rosmy John
- Vijay Kumar Sen
- M. Ramprabhu
- A. Ajay Krishna
- G. Manju
- Tarun K. Pant
- Santhosh J. Nalluveettil
- P. Pradeep Kumar
- Nirbhay Kumar Upadhyay
- Md. Mosarraf Hossain
- Vipin Kumar Yadav
- R. Sajeev
- Jothi Ramalingam
- Philip George
- N. Mridula
- Aswathy R. P. Janmejay Jaiswal Rana
- Snehil Srivastava
- Satheesh Thampi
Journals
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Nandi, Amarnath
- MENCA experiment aboard India’s Mars Orbiter Mission
Abstract Views :281 |
PDF Views:125
Authors
Anil Bhardwaj
1,
S. V. Mohankumar
1,
Tirtha Pratim Das
1,
P. Pradeepkumar
1,
P. Sreelatha
1,
B. Sundar
1,
Amarnath Nandi
1,
Dinakar Prasad Vajja
1,
M. B. Dhanya
1,
Neha Naik
1,
G. Supriya
1,
R. Satheesh Thampi
1,
G. Padma Padmanabhan
1,
Vipin K. Yadav
1,
A. V. Aliyas
1
Affiliations
1 Vikram Sarabhai Space Centre, Indian Space Research Organisation, Thiruvananthapuram 695 022, IN
1 Vikram Sarabhai Space Centre, Indian Space Research Organisation, Thiruvananthapuram 695 022, IN
Source
Current Science, Vol 109, No 6 (2015), Pagination: 1106-1113Abstract
The Mars Exospheric Neutral Composition Analyser (MENCA) aboard the Indian Mars Orbiter Mission (MOM) is a quadrupole mass spectrometer-based experiment. Making use of the highly elliptical and low inclination (~150°) orbit of MOM, MENCA will conduct in situ measurements of the composition and radial distribution of the Martian neutral exosphere in the 1–300 amu mass range in the equatorial and low latitudes of Mars. The functionality of MENCA has been tested during the Earth-bound and heliocentric phases of MOM before its operation in the Martian orbit. This article describes the scientific objectives, instrument details, design and development, test and evaluation, and calibration of the MENCA instrument.Keywords
Exosphere, Mars Orbiter, mass spectrometer, thermal escape.References
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- Sridharan, R., Ahmed, S. M., Das, T. P., Sreelatha, P., Pradeepkumar, P., Naik, N. and Supriya, G., Direct evidence of water (H2O) in the sunlit lunar ambience from CHACE on MIP of Chandrayaan-1. Planet. Space Sci., 2010, 58, 947–950.
- Sridharan, R., Das, T. P., Ahmed, S. M. and Bhardwaj, Anil, Indicators forlocalized regions of heavier species in the lunar surface fromCHACE on Chandrayaan-1. Curr. Sci., 2013, 105(11), 1470–1472.
- Sridharan, R., Das, T. P., Ahmed, S. M., Supriya, Gogulapati, Bhardwaj, Anil and Kamalakar, J. A., Spatial heterogeneity in the radiogenicactivity of the lunar interior: inferences from CHACE andLLRI on Chandrayaan-1. Adv. Space Res., 2013, 51, 168–178.
- Thampi, S. V., Sridharan, R., Das, T. P., Ahmed, S. M., Kamalakar, J. A. and Bhardwaj, Anil, The spatial distribution of molecular hydrogenin the lunar atmosphere – new results. Planet. Space Sci., 2015, 106, 142–147; http://dx.doi.org/10.1016/j.pss.2014.12.018
- Mars Orbiter Mission environmental level specifications, ISROISAC-MOM-PR-2063. ISRO internal document with restricted access, December 2012.
- Chandra’s Atmospheric Composition Explorer-2 Onboard Chandrayaan-2 to Study the Lunar Neutral Exosphere
Abstract Views :435 |
PDF Views:111
Authors
Tirtha Pratim Das
1,
Smitha V. Thampi
2,
M. B. Dhanya
2,
Neha Naik
2,
P. Sreelatha
2,
P. Pradeepkumar
2,
G. Padma Padmanabhan
2,
B. Sundar
2,
Dinakar Prasad Vajja
2,
Amarnath Nandi
2,
R. Satheesh Thampi
2,
Vipin K. Yadav
2,
J. K. Abhishek
2,
Md. Nazeer
2,
P. T. Lali
2,
Rosmy John
2,
A. V. Aliyas
2,
Vijay Kumar Sen
2,
M. Ramprabhu
2,
A. Ajay Krishna
2
Affiliations
1 Directorate of Technology Development and Innovation, Department of Space, ISRO Headquarters, Antariksh Bhavan, New BEL Road, Bengaluru 560 094, IN
2 Vikram Sarabhai Space Centre, ISRO, Thiruvananthapuram 695 022, IN
1 Directorate of Technology Development and Innovation, Department of Space, ISRO Headquarters, Antariksh Bhavan, New BEL Road, Bengaluru 560 094, IN
2 Vikram Sarabhai Space Centre, ISRO, Thiruvananthapuram 695 022, IN
Source
Current Science, Vol 118, No 2 (2020), Pagination: 202-209Abstract
The CHandra’s Atmospheric Composition Explorer-2 (CHACE-2) experiment aboard Chandrayaan-2 orbiter will study in situ, the composition of the lunar neutral exosphere in the mass range 1–300 amu with mass resolution of 0.5 amu. It will address the spatial and temporal variations of the lunar exosphere, and examine water vapour as well as heavier species in it. In this article, results of the major characterization and calibration experiments of CHACE-2 are presented, with an outline of the qualification tests for both the payload and ground segment.Keywords
CHACE-2, Chandrayaan-2, Exosphere, Mass Spectrometer.References
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- Sridharan, R., Das, T. P., Ahmed, S. M., Supriya, G., Bhardwaj, A. and Kamalakar, J. A., Spatial heterogeneity in the radiogenic activity of the lunar interior: Inferences from CHACE and LLRI on Chandrayaan-1. Adv. Space Res., 2013, 51, 168–178.
- Thampi, S. V., Sridharan, R., Das, T. P., Ahmed, S. M., Kamalakar, J. A. and Bhardwaj, A., The spatial distribution of molecular hydrogen in the lunar atmosphere – new results. Planet. Space Sci., 2015, 106, 142–147.
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- Lunar Near Surface Plasma Environment from Chandrayaan-2 Lander Platform:RAMBHA-LP payload
Abstract Views :343 |
PDF Views:143
Authors
G. Manju
1,
Tarun K. Pant
1,
P. Sreelatha
1,
Santhosh J. Nalluveettil
1,
P. Pradeep Kumar
1,
Nirbhay Kumar Upadhyay
1,
Md. Mosarraf Hossain
1,
Neha Naik
1,
Vipin Kumar Yadav
1,
Rosmy John
1,
R. Sajeev
1,
Jothi Ramalingam
1,
Philip George
1,
Amarnath Nandi
1,
N. Mridula
1,
Aswathy R. P. Janmejay Jaiswal Rana
1,
Snehil Srivastava
1,
Satheesh Thampi
1
Affiliations
1 Vikram Sarabhai Space Centre, ISRO, Thiruvananthapuram 695 022, IN
1 Vikram Sarabhai Space Centre, ISRO, Thiruvananthapuram 695 022, IN
Source
Current Science, Vol 118, No 3 (2020), Pagination: 383-391Abstract
The near surface lunar plasma environment is modulated by important components like the photoelectron sheath, solar wind, lunar surface potential, etc. In situ measurements of lunar near surface plasma are not available as of now. Previous lunar missions which explored the near surface environment have arrived at estimates of lunar photo electron densities mainly from lunar sample returns. The Chandrayaan-2 lunar mission affords a unique opportunity to explore the near surface lunar plasma environment from the lunar lander platform. A Langmuir probe is developed indigenously for probing the tenuous lunar near surface plasma environment from the top deck of the lunar lander. The probe is designed to cater to a wide dynamic range of 10/cc to 10,000/cc. The probe behaviour is characterized in the ambient room conditions using a current source. The sensitivity of the probe to incoming ionized species is also characterized in a vacuum chamber. The Langmuir probe response is characterized such that the input current to the probe is correctly deciphered during the mission duration. The calibration of the present Langmuir probe is carried out using a standard calibrated Langmuir probe. The details of the theoretical simulations of the expected currents, the characterization and calibration activities are presented and discussed.Keywords
Debye Length, Electron Density, Electron Temperature, Langmuir Probe.References
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