BIRDS-4 Flight Model assembly

We started to assemble BIRDS-4 Flight Model (FM) from November.

We were assembling the satellites in the clean-room so that the satellite will not be contaminated by dust.

After we finish, we will do some environment test.

We were assembling the satellites
Checking function of the solar cells we attached
Antenna boards with antenna materials


BIRDS-4 CDR was held on 5th September, 2019.

The purpose of CDR which stands for Critical Design Review is to discuss about the detail of BIRDS-4 satellite mission and subsystem. The CDR demonstrates that the maturity of the program’s design is appropriate to support proceeding full-scale fabrication, assembly, integration, and test and that the technical effort is on track to complete the flight and ground system development and mission operations in order to meet overall performance requirements within the identified cost and schedule constraints. Progress against management plans, budget, and schedule, as well as risk assessment was presented.

From Paraguay, Dr. Kurita who belongs to Paraguayan Space Agency and Eng. Federico Gaona who belongs to Polytechnic Faculty of National University of Asuncion participated in CDR.

The Long Range Test of Engineering Model

On August 2, we did the long range test using BIRDS-4 EM.

The purpose of this test is to perform a communication test between the satellite located on top of Sarakura mountain in Kitakyushu (622 m) and the KyuTech Ground Station (hereinafter called “GS”).

The test begins as the satellite transmits a CW beacon. We can analyze the status of satellite from the beacon in terms of temperature, voltage and mission data.

We received beacon of the satellite at GS; however, we thought we need to improve the performance of antenna more.

We will conduct the test again.

Vibration Test

We did the vibration test using STM: Structural Testing Model.

Fig1. Vibration test

The purposes of this test are

・Resistance to vibration environment at launch

・Rigidity of actual machine (Lowest mode natural frequency)

・Workmanship on structure and assembly

・Validity of structural analysis model

We are checking characteristics of the model and analyzing to improve.