Mission statement


IRIS-A CubeSat’s mission objective is to demonstrate Internet of Things (IoT) communication technology in space. Techniques are developed to compensate for the significant attenuation and Doppler shift in the mission so that ground measurements can be uplinked, stored, and forwarded.

IRIS-A CubeSat will be launched this year. Users can obtain IRIS-A data through HERE. The following data types will be released.

  • Tracking Information
  • System Housekeeping Data
  • IoT Ground Station Terminal Data
  • Image Data

IRIS-A Overview


IRIS-A Bus

  • 2U Volume
  • Inherit and upgrade from PHOENIX bus

IRIS-A Payload

  • Simple Camera (NCKU)
  • LoRa Receiver (LETSCOM)
  • GPSR Device (NSPO)
  • Reference Clock (NCKU)

IRIS-A Mission Description


IoT technology demonstration is the main mission objective of IRIS-A mission. IoT technology demonstration IoT Device are composed by LoRa Receiver, GPS Receiver, Reference Clock. Two main communication experiments are conducted with different device setup of IoT device. The first experiment is LoRa delay tolerant network, it is used CubeSat to test LoRa based modulation to collect weak signal from LoRa end device in orbit and forward to ground station. The rule of CubeSat play as a gateway of LoRa device.
LoRa Receiver will collect received LoRa data and tag them with geo information from GPSR. These data will be stored and forward to during the next pass of NCKU ground station or partner ground station. The second experiment is doppler compensation experiment. CubeSat will estimate and compensate doppler frequency shift which is experienced on targeted ground station. Not like the first experiment, CubeSat will broadcast its heath status information not received LoRa data.

Second mission objective is using a COTS camera to demonstrate the image data handling capability of our local ground station. Simple Camera is equipped with ArduCam and a Daughter Board. The main purpose is to test software for IRIS-B system. Including image retrieval system, time synchronized mechanism. CCSDS frame retransmit, etc. The secondary purpose is to build capability for daughter board as flight computer that will be beneficial for the next IRIS satellites.

IRIS-A Data Release


Here is IRIS-A Latest TLE

Mission Start Time End Time
IRIS-A Realtime 2021.01.01 2021.06.30

Last update: 2021/06/30 UTC

Tracking Information

Tracking Information is about IRIS-A RF Information/Packet Configuration/Beacon Format. Version 1.3 of the document was released on 2022/01/26

System Housekeeping Data

System Housekeeping Data is information about the satellite and its health and safety.

Image Data

Collections of Satellite Image Data

IoT Ground Station Terminal Data

Collection of sensor data from ground station terminal everywhere.