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ITF-2

ITF-2 is a Ultra-small artificial satellite developed by Yui Project, Univ. Of Tsukuba 

In September 2014, ITF-2 obtained the Launch Opportunity by ‘Kibo’ Ultra-small Sat. Deployment program.Ever since then, Project members have devoted themselves to its development and missions to be carried out.Click here to know more about the Launch Opportunity and Deployment program.

In 2017 , ITF-2 was successfully  deployed from ISS Japanese Experimental Module ‘Kibo’ .

Inheriting the fundamental design and layouts of its predecessor ITF-1, further enhancement has been made in it’s overall credibility and downlink data variations, thus, making it a superior version of ITF-1. 

ITF-2

ITF-2 (YUI No.2) FRONT

 

ITF-2 FM

ITF-2 (YUI No.2) BACK

ITF-2 (YUI No.2) SUMMARY

 

 Name ITF-2
Nick Name YUI 2
Size 1U(110.5×108.0×111.5mm)
Mass 1.39 Kg Approx.
Signals Transmitted

From Sat. to Ground

Frequency 430MHz  Band

Morse, Audio , AFSK

Signals Transmitted

From Ground to Sat.

Frequency 430MHz Band, 144MHzBand

AFSK

Orbit Altitude 400㎞

Inclination 51.6 Degrees

Operation Period 3 to 4 months

1.Construction of ‘YUI’ Network

‘YUI’ Network is a community created by people who share in common the experience of receiving signal data from our satellite.  Our aim is to connect people ,who otherwise would not have anything in common, by the common experience of receiving signals from ITF-2.Constructing a network for the growing community would be what we call the YUI NETWORK’s mission.

In the ITF-2, the telemetry data is transmitted in FM.By letting people from all over the receive our satellites’ signals that change every minute every seconds, we hope to provide a fun and interactive way to bring about the curiosity and interest towards space exploration.We also welcome reception reports in our Web site and plan to develop an environment where people sharing the common experience of receiving our signals, get to know each other.We think this will connect people with common interest around the world.

In addition, we plan to collect messages at public demonstrations and send it to ITF-2 for downlink. These messages will be sent to all receivers around the world.This exchange of messages ,we think , would lead to a new link between people.

2.Demonstration of Ultra-small antenna

The antennae used in devices created with MEMS technology and RFID are being made much shorter than the wavelength. In the near future, Field of Ultra-small Satellites may rely on these technologies for further enhancement and increased credibility of the satellite

As a step towards it , in ITF-1, we incorporated an Ultra-small antenna which we developed for 415MHz Amateur Band and further in ITF-2 , an enhanced version of it has been equipped in the same frequency band.The mission is to test the working of this antenna using AFSK. Confirming it’s performance would make the choice of antennae broader in the field of Space exploration and satellites.

3.Demonstration of the New Microcontoller

Up untill now, considering it’s high radiation resistivity which is tested in space , microcontrollers such as PIC 16F877 were the preferred choice when it came to the Control System.Our market today has a new type of microcontroller namely FRAM(Ferroelectric RAM) microcontroller which is said to have a high radiation resistivity. We have equipped MSP430FR5739, the new kind of microcontroller into the satellite to test its stability in space.

Devices which are not tested in space before are risky to use it as a main device.Therefore, it will be used such that it would not have impact on any other missions.Evaluation of the device is done by keeping track of single event latchups and upsets.

Under construction

Development of ITF-2 required 7 developer’s team and a mission promotion team. Links to the description of these are found belowの。

Descriptions

Power Supply System
Communication System
Ground Station
C&Dh系
Thermal System
Structure System
Attitude Control System

Mission promotion
Mission promotion team

Progress report

How to receive