Indian Deep Space Network – Planning, Analysis, Design, Development And Operationalisation

Paper number

IAC-07-B2.2.07

Author

Mr. G. Raghavendra Hathwar, Indian Space Research Organisation (ISRO), ISTRAC, India

Coauthor

Mr. L Srinivasan, ISRO Telemetry, Tracking & Command Network, India

Coauthor

Mr. R Raghnath, ISRO Telemetry, Tracking & Command Network, India

Coauthor

Mr. MJ Rajashekaran, ISRO Telemetry, Tracking & Command Network, India

Coauthor

Dr. VK Lakshmeesha, Indian Space Research Organisation (ISRO), ISAC, India

Coauthor

Mr. S.K. Shivakumar, Indian Space Research Organisation (ISRO), India

Year

2007

Abstract

The Indian Space Research Organisation (ISRO) is establishing a Deep Space Network (DSN) system consisting 18M and 32M Diameter Antenna system and  an India space Science Data Centre (ISSDC) to   support the future Chandrayaan-I and other Deep Space Missions of ISRO.  The DSN system will be configured for Chandrayaan Mission operations and payload data collection.  The fibre optic link will provide the necessary communication between DSN station and Spacecraft Control Centre (SCC) and ISSDC.  The 18M Antenna is capable of providing uplink in S-Band  (2 KW) in either RCP or LCP. The system has capability to receive two down link carriers in X Band and S-Band simultaneously in both RCP and LCP.   

	The 32M diameter Beam Wave-Guide Deep Space Network antenna with elevation over azimuth mount has been designed and developed to meet the deep pace missions of ISRO. The 32M Diameter Antenna has a shaped parabolic reflector designed to meet extremely high surface accuracy requirement of 0.3mm RMS to make it  Ka Band compliant.  It will have a shaped hyperbolic sub-reflector of 3.32m diameter mounted in Cassegrain geometry.  The antenna mount is having  wheel and track  for azimuth  and a bull gear system for elevation motion.  The antenna is driven by a servo system in counter torque mode in both axes, to achieve extremely high pointing accuracy of 15 m-deg. The antenna system is designed and analysed for wind loads using both Cohen’s and CFD method for achieving high stiffness and very low deflection. The antenna is provided with the state-of-the-art Beam Wave guide system consisting of 7 mirrors to receive and transmit the signal in both X \& S Band.  A 20 KW water-cooled S-band high power transmitter will provide the necessary uplink  in either LCP or RCP.  On the down link side a cryo-cooled LNA (15o k) 2:1 configuration will give a very low system noise temperature.   The antenna system is provided with the servo system designed to track the spacecraft in both program and step track mode.  The 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 Centre through a monitoring and control system.  
The proposed paper will give in detail the design, development, planning, analysis and operationalisation of DSN System for supporting future deep space missions of ISRO and other space agencies.

Abstract document

IAC-07-B2.2.07.pdf

Manuscript document

IAC-07-B2.2.07.pdf (🔒 authorized access only).

To get the manuscript, please contact IAF Secretariat.