Satellite Details

  This webpage introduce you details of satellites which are developed at Nihon University. This page mainly shows communication system, amateur radio service, and telemtry data format.

  Choose a satellite.

SEEDS  -Space Engineering EDucation Satellite-


  Our first satellie. We completed development of SEEDS in 2004. In July 2006, at Kazakhstan, the launch of SEEDS FM1 (Flight Model 1) was failed because of the launch vehicle's engine trouble.
  After the launch failure, we developed SEEDS FM2 (Flight Model 2). We exported FM2 to the University of Toronto, Canada, and finished all checks in June 2007.
  FM2 was launched by the Indian PSLV (Polar Satellite Launch Vehicle) in April 28th 2008.

  Check more details of SEEDS at SEEDS Project Website

SEEDS Project Website


Communication System

Communication system of SEEDS are using amateur radio frequency. You can recieve SEEDS's radio wave, if you have enough facilities.
More details below

Call Sign JQ1YGU
(FM Packet)
Reciever Frequency Band:VHF Band
Antenna:1/4 wavelength monopole
(CW Beacon)
Transmitter Frequency Band:437.485MHz
Transmitter Power:110mW
Antenna:1/4 wavelength monopole
Protocol:Morse code
(FM Packet)
Transmitter Frequency Band:437.485MHz
Transmitter Power:450mW
Antenna:1/4 wavelength monopole
Modulation:AFSK 1200bps
Transmitter Frequency Band:437.485MHz
Transmitter Power:450mW
Antenna:1/4 wavelength monopole

All downlink frequency band of SEEDS are 437.485MHz. SEEDS change its mode by uplink command from Ground Station.

Amateur Radio Service

  SEEDS has following Amateur radio function.

    ・CW downlink
    ・FM Packet downlink

   You can get QSL card by recieving SEEDS's radio wave. Please report it from webpage of publishment QSL card.We also want you to upload your downlink data in order to share downlink data with everyone. Use upload webpage anytime. And, you can get special QSL card by recieving Digi-talker and SSTV. We want you to enjoy SEEDS operation.

※You need Keyword in digi-talker voice to get QSL card for digitalker. You also need to explain the feature of SSTV image to get QSL card for SSTV.

Telemetry Format

  This contents shows SEEDS's telemetry format. SEEDS has three major modes which are CW downlink mode, FM Packet downlink mode, and Digitalker mode. There are more several mode in each mode. Check PDF files below to see All details about telemetry format.

CW Telematry Format
PDF File
FM Packet Telemetry Format
PDF File
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