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Raju, G.
- Engineering Challenges in the Megha-Tropiques Satellite
Abstract Views :224 |
PDF Views:66
Authors
G. Raju
1
Affiliations
1 School of Engineering and Technology, Jain University, Jain Global Campus, Jakkasandra Post, Kanakapura 562 112, IN
1 School of Engineering and Technology, Jain University, Jain Global Campus, Jakkasandra Post, Kanakapura 562 112, IN
Source
Current Science, Vol 104, No 12 (2013), Pagination: 1662-1670Abstract
Megha-Tropiques is an Indo-French satellite mission for climate research and applications in tropical regions. It is built using ISRO's IRS platform and four high technology payloads: MADRAS, SAPHIR, SCARAB and ROSA. MADRAS is a joint development; CNES provided SAPHIR and SCARAB; ROSA is procured by ISRO. Realization of the satellite was a challenging task for inclined orbit operations, with complex features such as: three mechanically scanning payloads; two payload deployments; large rotating mass (MADRAS); mission-critical power and signaltransfer device. Megha-Tropiques was launched on 12 October 2011 by ISRO's PSLV into a 20° inclined orbit for high observation frequency. It is controlled by ISRO's ISTRAC ground station. Science data is received at ISTRAC and CNES-stations at Kourou and Hartebeeshoek.Keywords
Flip Mode, IRS Platform, MADRAS, Moon Calibration, TRMM.Full Text
- Development of 90 GHz Microwave Radiometer Sensor in Snow/ice Studies Over the Himalaya as Input for Disaster Monitoring
Abstract Views :248 |
PDF Views:79
Authors
Affiliations
1 Department of Electronics and Communication Engineering, School of Engineering and Technology, Jain (Deemed-to-be University), Bengaluru 562 112, IN
1 Department of Electronics and Communication Engineering, School of Engineering and Technology, Jain (Deemed-to-be University), Bengaluru 562 112, IN
Source
Current Science, Vol 116, No 10 (2019), Pagination: 1715-1720Abstract
In this study, a sensor is designed based on a basic radiometer system at 18.8 GHz for ground-based testing and operations. Initially a generic radiometer will be designed in total power radiometer configuration (Phase 1) that is more appropriate for remote sensing platforms for operations in a campaign mode, such as an airborne mission. The same radiometer is proposed to be modified as a null-balancing Dicke radiometer (Phase 2) that is more suitable for long-term field operations over a range of temperatures and environmental conditions. This system is also useful for long-term propagation experiments in communication. The development of a millimeter-wave radiometer is in several hardware realization phases identified as Phases 1 and 2. The present proposal is expected to facilitate realization and utilization of microwave radiometers for space applications. The team at Jain University, Bengaluru will complement activities at ISRO in remote sensing applications through any campaigns proposed by the latter. Any future incremental development activities such as augmentation at higher frequencies as well testing newer concepts such as phased-array antenna for electronic scanning at lower frequencies, dichroic antennas at very high frequencies, etc. may be attempted based on the trends in technology/hardware.Keywords
Disaster Monitoring, Microwave Radiometer, Remote Sensing, Snow/Ice Studies.Full Text
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