FITSAT-1 Update

FITSAT-1 plans to use LED’s to signal in Morse code

The amateur radio CubeSat FITSAT-1 (aka NIWAKA) carries an Optical Communications experiment that aims to write Morse Code across the night sky. The satellite is fitted with a bank of high power LEDs that will be driven with 200W pulses to produce extremely bright flashes that may be visible to the unaided eye.

FITSAT-1 was deployed from the International Space Station (ISS) at 15:44 UT on Thursday, October 4 along with F-1 and TechEdSat.

On Sunday, October 7 Takushi Tanaka JA6AVG provided this update:

We have received a lot of signal and telemetry reports from amsat members. All reports show FITSAT-1 starts working and sound. Thank you very much for your help.

We will examine movements, temperatures, and battery states of FITSAT-1 during these 10 days, and start experiments of 5.8GHz transmission and flashing LEDs.

I will announce the experiments on my web-page

As well as 437.250 MHz and 437.445 MHz (both +/- 10 kHz Doppler) this innovative satellite can also transmit on 5840.0 MHz (+/- 134 kHz Doppler).

FITSAT-1 – NIWAKAFITSAT-1 (NIWAKA) is a 1U CubeSat (10*10*10cm) developed by students at the Fukuoka Institute of Technology (FIT).

FITSAT-1 (aka NIWAKA) is a 1U CubeSat (10*10*10cm) developed by students at the Fukuoka Institute of Technology (FIT).

The primary mission is to transmit 115.2 kbps digital data on 5840.0 MHz using a transmitter capable of 2 watts output. The data rate is significantly higher than that of previous amateur radio satellites and will enable a VGA-size (640×480 pixel) JPEG image to be transmitted in only 5 to 6 seconds.

The second mission is to determine if a satellite can be made to appear as an “artificial star” using high-output LEDs in flash mode. The light from this flash will be received by the ground station, which has a telescope with photo-multiplier linked to a 5.8 GHz parabola antenna. This is a basic experiment to investigate the possibility of optical communication with satellites.

Takushi Tanaka JA6AVG and FITSAT

Takushi Tanaka JA6AVG and FITSAT

The 437.250 MHz CW beacon signal was activated 30 min after deployment. Please send the signal report, telemetry data (if possible) and your postal address to and also cc to You will receive a verification (QSL) card [presumably electronic]. Initially the orbit will be almost the same as the ISS.

In addition to the CW beacon there is an AX.25 1200 bps packet radio transceiver on 437.445 MHz for telemetry and command purposes.

The FITSAT-1 CW beacon frequency 437.250MHz is on the same frequency as the PRISM micro-satellite built by students at Tokyo University. Please confirm that the CW starts “HI DE NIWAKA JAPAN …”

HB9FFH has made a telemetry decoder for FITSAT-1 available from the Carpcomm site

A  telemetry decoder for Windows is available at

FITSAT-1 Flight Model

Takushi Tanaka JA6AVG will announce news about FITSAT-1 such as the LED experiments at

ISS Amateur Radio CubeSat Deployment October 4

Watch the deployment live at

Tracking FITSAT-1

Initially FITSAT-1 was in virtually the same orbit as the International Space Station and the ISS Fan Club real-time tracking at could be used to determine its position. It has now drifted away from the ISS and real-time tracking is available at

FITSAT-1 Underside

‘Keps’ for CubeSats are at

Keplerian Two Line Elements (TLEs) ‘Keps’ for new satellites launched in past 30 days

Free Satellite tracking software
• SimpleSat Look Down
• Gpredict
• Orbitron