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sicral1-tools's Introduction

SICRAL 1 Legacy Tools

History

Sicral 1 is Italy’s first military satellite. It was designed to operate for 10 years from 16.2°E longitude and provide communications to fixed and mobile terminals operated by the Italian military. Sicral is Europe’s first venture into extremely high-frequency (EHF) broadcast frequencies.

In January 2017, almost 6 years after the forecasted end-of-life, the Sicral 1 Mission Control System was affected by a bug not allowing the conversion of a datetime to On-Board Reference Time (OBRT). This issue was caused by the overflow of an internal UNIX-time variable to which only 40 bits were allocated and resulted in the impossibility to send neither time-tagged telecommands neither updated bolometers inibition time plans. In order to solve it, I created the tools ttcalc and bolocalc to help the spacecraft controllers to easily calculate respecively the OBRT values for time-tagged telecommands and bolometers inibition time.

Build

$ make build

Time-tagged Telecommands Management Tool

$ make tt

Bolometers Inibition Management Tool

$ make bolo

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