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Mathew, Kurian
- Methane Sensor for Mars
Abstract Views :238 |
Authors
Kurian Mathew
1,
S. S. Sarkar
1,
A. R. Srinivas
1,
Moumita Dutta
1,
Minal x Minal Rohit
1,
Harish Seth
1,
Rajiv Kumaran
1,
Kshitij Pandya
1,
Ankush Kumar
1,
Jitendra Sharma
1,
Jalshri Desai
1,
Amul Patel
1,
Vishnu Patel
1,
Piyush Shukla
1,
S. Manthira Moorthi
1,
Aravind K. Singh
1,
Ashutosh Gupta
1,
Jaya Rathi
1,
P. Narayana Babu
1,
Saji A. Kuriakose
1,
D. R. M. Samudraiah
1,
A. S. Kiran Kumar
1
Affiliations
1 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 058, IN
1 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 058, IN
Source
Current Science, Vol 109, No 6 (2015), Pagination: 1087-1096Abstract
Methane Sensor for Mars (MSM), on-board Mars Orbiter Mission is a differential radiometer based on Fabry–Perot Etalon (FPE) filters which measures column density of methane in the Martian atmosphere. It is the first FPE sensor ever flown to space. Spectral, spatial and radiometric performances of the sensor were characterized thoroughly during the pre-launch calibration. Geophysical calibration of the sensor was carried out using the data acquired over Sahara desert during Earth Parking Orbit phase. Retrieval algorithm for MSM, which is based on the linearization of radiative transfer equations, gets simultaneous solutions for CH4 and CO2 concentrations in the Martian atmosphere.Keywords
Differential radiometer, Fabry–Perot Etalon, geophysical calibration, methane sensor, retrieval algorithm.Full Text
References
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- Georgieva, E. M., Heaps, W. S. and Wilson, E. L., Differential radiometersusing Fabry–Perot interferometric technique for remotesensing of greenhouse gases. IEEE Trans. Geosci. Remote Sensing, 2008, 46(10), 3115–3122.
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- Correction of Mars Colour Camera images for identification of spectral classes
Abstract Views :251 |
PDF Views:130
Authors
Affiliations
1 Space Applications Center, Indian Space Research Organisation, Ahmedabad 380 015, IN
1 Space Applications Center, Indian Space Research Organisation, Ahmedabad 380 015, IN
Source
Current Science, Vol 112, No 06 (2017), Pagination: 1158-1164Abstract
Mars Colour Camera on-board the Mars Orbital Mission makes use of a Bayer pattern detector. Spectral response of RGB (red, green and blue) pixels of Bayer detector shows large overlap which reduces the spectral information content of the image. In the present paper, a simple method is suggested to correct the data for spectral overlap. It is shown that correction process significantly increases the spectral information content of the image and enhances the ability of the sensor to identify different target types like dust clouds and water ice clouds.Keywords
Bayer-Pattern Filters, Dust Clouds, Ice Clouds, Mars Colour Camera, Spectral Overlap.Full Text
References
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