Challenges in Frequency Allocation for Telemetry Downlinks of Co-located Geostationary Satellites

Conference: Recent Trends in Information Processing, Computing, Electrical and Electronics
Author(s): Sirshendu Das, Neelavathy M, Kosuru Sai Malleswar, Khan Afzaal, Rajeev Ranjan Year: 2017
Grenze ID: 02.IPCEE.2017.1.2_3 Page: 353-356

Abstract

Telemetry, Tracking and Command Subsystem is critical for a space mission that calls for dual redundancy of\neach of its elements at well separated spot frequencies. Increased number of geostationary missions along with dual\nredundancy philosophy resulted in scarcity of bandwidth for satellites to be co-located with existing ones in future. This\npaper describes the constraints related to closely spaced carrier frequency allocation within the bandwidth allocated to\ntelemetry link in C-Band such that the ground station would be able to separate them and demodulate. Based on the\nexperimental results, this paper recommends the minimum frequency separation between carriers of telemetry downlinks\nallocated to main and redundant units of the same Spacecraft or units of two collocated satellites.

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IPCEE - 2017