[updated: December 2019]

Our laboratory (Miyazaki Group) had supported the nano-satellite development project, and supports a design project "CESS" now (The nano-satellite development project is supported by Prof. Yamazaki's Group. You can see the detail of the nano-satellite development project at the website of Prof. Yamazaki's group)

Our college established College of Science and Technology Future Doctor Lab (CST Mirai-Hakase-Kobo) in 2007 that supports the student design projects. It has several laboratories and our department supports the "Aerospace Lab".

CESS(Cutting-Edge Space Structure Systems) is a student design group that has been establshed since April, 2017. It was called "Cutting-Edge Space Systems" at first, but it was renamed "Cutting-Edge Space Structure Systems" and joined the Aerospace Lab.

The objective of CESS is to propose a cuttinge-edge space systems. The proposal of novel gossamer space structure such as solar sail, self-deployable starahde, and membrane space solar power system is one of the prior projects in CESS.

CESS is opened for the students who have motivation more than taking the class. The activities of CESS includes thr following two topics:

  1. The member study on the misgion design, the spacecraft design to achieve the mission, and demonstrate the mission using a conceptual model.
    • We use the real satellites (1u CubeSat "SEDDS-II! launched in April 2008 and "NEXUS" launched in January 2019 that were developed by our laboratoriy's students). The member study on the detail design of NEXUS and will be able to desing a 1U CubeSat by theirselves. They also study on the operation of real spacecraft by experiencing the operation of SEEDS-II and helping the operation of NEXUS.
    • And they will study on the design theory of spacecraft through the participation of design competition such as Satellite Design Contest.
  2. The member study on the mathematics, mechanics, and scientific programing from the beginning of the first year to the end of the third year thorugh the seminors.
    • It is necessary for the design of space structure to predict the motion of the structure in space. Therefore, the member need to make full use of not only mathematics (linear algebra, differentiation and integration, differential equations) and engineering mechanics, but also geometric mechanics, orbit mechanics, and scientific programming.

(Former Nano-Satellite Development Project)

Our laboratory started the nano-satellite development project in 2001, and the project joined the Mirai-Hakase-Kobo in 2007 as "Satellite Lab". They continued the projects and launched three satellite unntil 2014.

In 2015, our department formed "Aerospace Lab" that is the consortium of several projects in the department, and the Satellite Lab has been managed by Prof. Yamazaki since that time. However, the NEXUS project that had already started in the Satellite Lab did not join the Satellite Lab and our laboratory supported the NEXUS project since that time.

NEXUS was launched in January 2019. Our laboratory member have been operating NEXUS and proceeds the utilization of NEXUS in CESS.

The overview of four satellites developed in our laboratory and Satellite Lab is shown in thetable below. You can see the overview of each satellite if you click the satellite name in the table

Our laboratory/Satellite Lab has launched three satellites and is developing one satellite. You can see the overview of each satellite if you click the satellite name in the table below.

SEEDS 1U CubeSat launched in July 2006. Our first satellite. SEEDS was not injected into the orbit because the rocket had some trouble in the first engine.
SEEDS-II 1U CubeSat launched in April 2008. The launch was successful and SEEDS-II is now under late operation phase.
SPROUT 20cm class (8U) CubeSat launched in May 2014. The launch was successful, and the deployment mission of the combined membrane structure was conducted in June 2016. The attitude determination and control mission was conducted between 2014 to 2016. After the two and half year's operation, SPROUT had a trouble with the receiveing subsystem. SPROUT has not been accept the uplink command since mid of September, 2016. We guess the reason is the trouble of the receiving antenna or relating electric circuit. SPROUT is programed so that it stops the downlink if it has not received the uplink command for about 1 month. Therefore, SPROUT stopped the downlink in the end of October 2016. We guess the electric power of SPROUT is tuened on still now, so we have been sending the uplink command periodically to recover SPROUT.
NEXUS 1U CubeSat developed with JAMSAT, which is an amateur satellite equipped with a transponder. NEXUS was launched in January 17, 2019 as one of the Innovative satellite technology demonstration program by Epsilon rocket #4.

College of Science and Technology, Nihon University
Department of Aerospace Engineering
Space Structure Systems Laboratory
College of Science and Technology, Nihon University
7-24-1 Narashinodai, Funabashi, Chiba 274-8501, Japan
e-mail: asel (at) forth.aero.cst.nihon-u.ac.jp