CanSat is simulation of real satellite. CanSat has key subsystems that are similar to real satellite, but it is not a satellite because it is not an orbital satellite. It is a nano-scale satellite model which all basic functions of a satellite, such as those of power and communications, are fitted into a standard soda can, i.e. 325ml for Malaysia standard. The participant will involve with the full cycle of the real satellite development process during the development of CanSat, which consists of designing, fabrication, assembly, integration, testing, launching and operation.

Just as a real satellite, the CanSat is constructed from 2 systems: the bus (platform) and the payload. The bus provides in all the needs of the payload. The bus consists of the structure (soda can, antenna and circuit board), power (battery), telecommunication (transmitter), data handling unit (processor), the attitude control subsystem (parachute) etc. The payload consists of one or more sensors, aimed at performing a specific mission. For example, to do altitude measurements a pressure sensor could be used.

A CanSat will be bringing up to its designed altitude (height) by a launcher. Once the desired altitude is obtained, the CanSat is ejected from the launcher and falls to earth under its own parachute. During the CanSat descent time, the CanSat payload shall collect the mission data and make necessary measurement. On the same time, ground station will communicate with CanSat in order to command and control the CanSat operation as well as receiving the telemetry data transmitted from CanSat.

There are many possibilities to bring a CanSat up to a certain altitude. Amateur rocket, captive balloon or radio-controlled aircraft are commonly used by the CanSat community.

CanSat can performs a mission and collects data during its descent time. Typical missions can be atmospheric measurement, video capture, imaging, communication or navigation. The mission can be simple or complex, but it should fit into a standard soda can size.

The CanSat competition is designed to provide students the opportunity to experience a hands-on space program at an affordable cost. The competition involves writing a mission proposal, generating design documentation, and launching the CanSat to desired altitude and preparing and briefing a post mission summary. The most important aspect of this competition is that each team will learn many important lessons that will apply throughout their professional career. By developing this project, learning what works and what doesn't, and learning to work as a team, each participant will develop an understanding of the processes that go into the development and success of any project.

Students from all background and knowledge levels are encouraged to participate in building a CanSat. Ideally, it is desirable to some knowledgeable electrical engineers, computer scientists, mechanical engineers and aerospace engineers working together to guide the students. A good number of students per CanSat is 5~6 person. There should be crosstalk and sharing of ideas wherever possible among the students. A set of requirements and deliverables shall be generated from the competition criteria. The students have to organize themselves into the various roles and responsibilities, set up meeting schedules and timelines, prepare and maintain documentation, meet deadlines, and select the missions to meet the competition requirements