Performance Characterization of Indian Deep Space Antenna - IDSN-32
- Paper number
IAC-08.B2.3.3
- Author
Mr. T. Parimalarangan, Indian Space Research Organisation (ISRO), India
- Year
2008
- Abstract
Indian Space Research Organization (ISRO) is establishing a Deep Space Network (DSN) facility for supporting future Chandrayaan-1 mission and other deep space missions of ISRO. One 32M-diameter Beam Wave Guide, wheel & track antenna system has been installed in the DSN facility near Bangalore, India. The Antenna is capable of receiving and transmitting signals in both X and S Band in circular polarization. A state-of-the-art servo system has been designed to operate the antenna system to meet the deep space operation requirements. The antenna system has been designed to meet the high pointing accuracy requirement of 15-milli deg for X Band operation. The Beam Wave Guide System is a system consisting of seven high precision aluminium mirrors with X and S band feed. A 20 KW water-cooled S-Band high power transmitter will provide the necessary uplink and a 2 KW S Band transmitter will serve as hot standby. A X-Band transmitter of 2.5 KW has been installed to provide uplink in X-Band. On the downlink side, cryo-cooled LNAs (15 deg k) in 2:1 configuration to achieve a very low system noise temperature is provided. The TTC processors of base-band will comply with CCSDS standards facilitating cross-support among the space agencies. The timing system consists of a hydrogen maser for short-term stability and cesium clock for achieving long-term stability. The antenna can be operated remotely from ISTRAC Network Control Center through a monitoring and control system. The paper specifically addresses the performance characterization of Beam Wave Guide System, the overall RF system performance in terms of antenna gain, system noise temperature, system G/T, EIRP, side lobe levels, transmit-receive isolation, the servo system performance, in terms of velocity, acceleration, pointing accuracy, operating modes and the structural/mechanical system performance like, surface accuracy, stiffness and nodal analysis. Further, the performance characterization of the ground station by tracking suitable planetary spacecraft will also be addressed in this Paper.
- Abstract document
- Manuscript document
(absent)