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Space Object Tracking, Manoeuvre Estimation and Sensor Tasking for Space Situational Awareness
May 21 @ 11:30 AM - 1:00 PM
Due to increased human activity in the last two decades, near-earth space has become congested from functional/non-functional satellites and space debris. These space objects of human origin, along with natural asteroids and space weather, pose natural, accidental, or intentional threats to functional and expensive satellites. It is imperative to track space assets continuously as well as assess collision threats to take necessary actions, which is termed Space Situational Awareness (SSA). Assessing the risk of collision of these space debris with active satellites requires estimation of the positions and velocities of both objects. While space object tracking is the primary task of an SSA system, other related tasks are estimating the manoeuvre of the catalogued objects and managing the sensor networks for observations. In this talk, we will discuss some recent advancements in space object tracking by repurposing radio telescopes, and estimation of satellite manoeuvres, where only the initial and final state information is available. We express the final state of the satellite as a function of the initial state and the manoeuvre and formulate an optimisation problem to estimate the manoeuvre time and Δ𝑉. We will discuss various strategies to solve this optimisation problem – including simultaneous and iterative estimation of manoeuvre time and Δ𝑉. We will then focus on managing a sensor network for SSA in terms of tasking the sensors to perform catalogue maintenance of space objects. We will discuss a time-invariant approach for optimally directing various ground stations to maximise the expected number of space objects visible by the sensor network.
Speaker: Dr. Sanat K. Biswas
Biography:
Dr. Sanat K. Biswas is an Associate Professor of Electronics and Communication Engineering at IIIT Delhi, and Head of IIIT Delhi Space Technology Centre (ISTC). He received his B.E. from Jadavpur University in 2010, an MTech. in Aerospace Engineering from IIT Bombay in 2012, and a PhD in computationally efficient Unscented Kalman filters for space vehicle navigation from the University of New South Wales (UNSW), Sydney, in 2017. His research specializes in Space Domain Awareness, GNSS-based navigation, Position, Navigation and Timing using LEO satellites. He is a Senior Member of the IEEE (2022), Associate Editor – IEEE Transactions on Aerospace and Electronic Systems and serves on the technical committees for Space Communications and Navigation (SCAN) and Space Traffic Management (STM) of the International Astronautical Federation (IAF). His contributions have been recognized with the 2014 Emerging Space Leaders Grant, the 2019 Early Career Research Award from the DST, the 2020 and 2021 Young Scientist Awards from URSI, and the 2020 Harry Rowe Mimno Award from the IEEE Aerospace and Electronic Systems Society.
Tea/Coffee: 11:00 AM
ALL ARE WELCOME