ATTITUDE DETERMINATION AND CONTROL SYSTEM OF SHARJAH-SAT-1

M. B. Ashour, T. Al-Kaabi, B. Karabulut, A. R. Aslan, Y. Faroukh*, I. Fernini, H. M.K. Al-Naimiy, E. Kalemci

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Sharjah-Sat-1 is the first CubeSat mission of the Sharjah Academy for Astronomy, Space Sciences, and Technology (SAASST), in collaboration with Istanbul Technical University Space Systems Design and Test Laboratory (ITU-SSDTL) and Sabanci University (SU). The 3U+ CubeSat's primary payload is an improved X-Ray detector (iXRD), with the objectives of detecting hard X-rays from very bright X-ray sources, as well as studying the solar coronal holes. The secondary payload is a dual-camera system for Earth imaging. A dual-camera system will be used to image the SAASST building with a size of about 100m. The iXRD requires an attitude accuracy of 1 degree or better. Its full width at half maximum is 4.26 degrees with a linear response for the square collimator used. Every 1-degree pointing error will lead to 23% information loss. The ADCS subsystem of Sharjah-Sat-1 has been carefully determined and selected to ensure the success of its sophisticated mission, considering the constraints on the CubeSat standards with regards to size, mass, and power, the operational requirements of the mission, and space environmental disturbances expected throughout the mission's lifetime. Those disturbances are mostly encountered at low altitudes, and Sharjah-Sat-1 is planned to have a Sun-synchronous orbit with an altitude of about 500 km, not exceeding 600km. The planned launch date of the mission is June 2022. The paper presents a discussion and evaluation of the ADCS system in detail and its importance in terms of the achievement of the Sharjah-Sat-1 scientific mission (both star/Sun imaging and Earth-imaging), the hardware and the software implemented for active control, and the various attitude determination and control modes for different sensors and actuators' configurations.

Original languageEnglish
Title of host publicationIAF Astrodynamics Symposium 2021 - Held at the 72nd International Astronautical Congress, IAC 2021
PublisherInternational Astronautical Federation, IAF
ISBN (Electronic)9781713843078
Publication statusPublished - 2021
EventIAF Astrodynamics Symposium 2021 at the 72nd International Astronautical Congress, IAC 2021 - Dubai, United Arab Emirates
Duration: 25 Oct 202129 Oct 2021

Publication series

NameProceedings of the International Astronautical Congress, IAC
VolumeC1
ISSN (Print)0074-1795

Conference

ConferenceIAF Astrodynamics Symposium 2021 at the 72nd International Astronautical Congress, IAC 2021
Country/TerritoryUnited Arab Emirates
CityDubai
Period25/10/2129/10/21

Bibliographical note

Publisher Copyright:
© 2021 International Astronautical Federation, IAF. All rights reserved.

Keywords

  • Astrodynamics
  • Attitude Control
  • Attitude Determination
  • CubeSat

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