I. Introduction
Development of advanced electronics has enabled building of CubeSats with powerful capabilities that were previously dominated by larger satellites. CubeSat belongs to the category of nanosatellite, which is built in multiples of 1U (10 10 cm) units. The CubeSat standards were originally proposed to enable students to learn, design, and test them in space [1], [2]. The concept of CubeSats gave affordable access to low-budget research programs for an ever increasing space missions to perform scientific experiments and validate new space technologies [3]. The very first set of six CubeSats were launched on June 30, 2003 on Eurockot [4] and since then, more than 1300 CubeSats have been launched [5]. Initially, academic institutes had majority of CubeSat launches, whereas most of the recent CubeSat launches are done for commercial purposes. The details of all the CubeSats that are launched as well as in planning stage can be seen in [5] and [6]. The list of some of the academic CubeSats referred in this article are shown in Table I.