I. Introduction
CubeSats, also known as U-class spacecrafts, are a type of miniaturized satellites that are made up of multiple Us, or cm cubic units, with a maximum mass of about 1.33 kg per U. CubeSats are installed into dispensers, typically carried into orbit as secondary payloads, and deployed in an orbit similar to the primary payload. For Earth remote sensing, the flight systems can be deployed from the International Space Station (ISS) after being delivered as soft-stowed cargo aboard one of the resupply missions. This quick, abundant, and relatively cheap access to space has elevated the importance of CubeSats for demonstrating technologies and collecting science measurements.