The Satellite of the University of Chile for Aerospace Investigation (SUCHAI) is the first chilean CubeSat developed by undergraduate students, engineers and professors of the Electrical Engineering, Physics and Mechanical Engineering Departments of the Faculty of Physical and Mathematical Sciences (FCFM) at University of Chile. The main goal is to learn the whole process of designing, building/integrating, launching and operating a picosatellite.

The 1U Cubesat has educational and scientific purposes. The spacecraft consists of three main subsystems:

  • On board computer: The C&DH unit is responsible of flight operation of the satellite. It uses a custom Flight Software for low power embedded systems.
  • Communication: It is composed of an UHF transceiver to enable telemetry (download link), CW beacon broadcast and telecommands (upload link).
  • Energy: The final subsystem consists of an energy control unit, solar cell panels and a lithium polymer battery.

SUCHAI mission considers the following payloads:

  • Langmuir probe: The main scientific goal of this payload is to study the ionosphere in synchronization with incoherent scatter radar (ISR) by taking simultaneous measurements of electron density variations in the ionosphere.
  • Electronic out of equilibrium: Simple RC experiment to study the out of equilibrium fluctuations in a hostile environment.
  • Camera: A small digital camera to study the feasibility of observing Earth from space with cubesats.
  • GPS: A GPS receiver to get the position of the spacecraft. In future missions dual frequency GPS receiver might be used for Total Electron Content (TEC) and/or water vapor (WV) determination using data ocultation technique.

SUCHAI Cubesat and Langmuir Probe

SUCHAI Cubesat

(Para Castellano ver más abajo)



  • Frequency : 437.230 MHz (The frequency is a little higher than nominal value of 437.225 MHz)
  • Mode : CW
  • Speed : 20 wpm
  • Periodicity : 180 seconds (changed to save battery)
  • Message : 00SUCHAI0 + TELEMETRY (variable length)

CW beacon telemetry consists in four different frames with information of main subsystems.


  • Frequency : 437.230 MHz
  • Mode : FM (MSK)
  • Baudrate : 2400 bps

We will very pleased if you want to help us with a report. The way to submit a report is the following.

1.- If you recorded the audio file (for beacon or telemetry)

Submit an email to or (If the file is too large) with the file using the following subject format

<Date> - <Time (UTC)> - <Callsign or Name>


2017/06/23 - 11:58:26 - CA3SBE

In the body you can add optional information like your location (Country, City or Latitude and Longitude) and the equipment that you are using to receive the signal.

2.- If you decoded the beacon

Please, upload the report in the following form

Beacon report form

In this document you will find a guide to decode the fields in the beacon

Guide to decode beacon

The preliminary TLE file can be found in the following link. We will update this file as soon as the launcher provide us with new information


Enlace de comunicaciones



  • Frecuencia : 437.230 MHz (La frecuencia es un poco más alta que la nominal 437.225 MHz configurada al lanzar el SUCHAI)
  • Modo : CW
  • Velocidad : 20 wpm
  • Periodicidad : 180 segundos (Cambiado para ahorrar batería)
  • Mensaje : 00SUCHAI0 + TELEMETRiA (Largo variable)

La baliza en CW consiste en cuatro diferentes paquetes con información de los subsistemas principales


  • Frecuencia : 437.230 MHz
  • Modo : FM (MSK)
  • Tasa de datos : 2400 bps

Estaremos muy contentos si nos quieres ayudar con un repote de una escucha. La forma para enviar el reporte es la siguiente

1.- Si grabaste el audio (Para baliza o telemetría)

Enviar un correo electrónico a o (Si el archivo es de tamaño muy grande) con el archivo usando el siguiente formato para el asunto

<Fecha> - <Hora (UTC)> - <Callsign o Nombre>


2017/06/23 - 11:58:26 - CA3SBE

En el cuerpo puedes agregar información adicional opcional como tu ubicación (País, ciudad o latitud y longitud) y el equipo usado para recibir la señal.

2.- Si decodificaste la baliza

Por favor, sube el reporte en el siguiente formulario

Formulario reporte baliza

En este documento encontrarás una guía para decodificar los campos en la baliza

Guia para decodificar baliza

El archivo TLE preliminar está en el siguiente enlace. Iremos actualizando este archivo a medida que tengamos más información del lanzador.


Av. Tupper 2007, Santiago, Chile