Radio Info

Orbiting Module

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  • Frequency
    • 437.31MHz
  • Antenna
    • SRR antenna
  • Polarization
    • Linear
  • Modulation
    • beacon, PSK31
  • Sync Word
    • C1 (ASCII code)
  • Power
    • 30dBm

UPLINK

  • Frequency
    • UHF-band
  • Antenna
    • 12M dish
  • Polarization
    • LHCP, RHCP
  • Modulation
    • FSK
  • Sync Word
    • FAF320

The diagram of communication system (OM)

RF system diagram of Orbiting Module

Link Budget PSK31 & PCM-PSK/PM from OM

Link Budget for PCM-PSK/PM

Suraface Probe

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  • Frequency
    • 437.41MHz
  • Antenna
    • invert-F antennax4
  • Polarization
    • LHCP(, RHCP)
  • Modulation
    • FM, PSK31, PCM-PSK/PM
  • Sync Word
    • C1 (ASCII code)
  • Power
    • 30dBm

The diagram of communication system (SP)

RF system diagram of Surface Probe

Link Budget PCM-PSK/PM from SP

Link Budget for PCM-PSK/PM of SP

Link Budget for FM Modulation from SP

Link Budget for FM modulation of SP

Mission Information

  • Verification of the semi-hard landing with airbag and others
  • Development of ultra-compact transponder and solid motor
  • The trajectory design for robust horizontal landing baesd on precision orbit determination
  • Measuring the radiation environment near the Earth and the Moon
mission sequence

The Operation of OM-Communication

It will transmit beacon or telemetry data with PSK31 in somewhere path on the way to the Moon.
That antenna gain is too small, so it is not easy to receive telemetry data. JHRC sends everyone who succeeds in capturing the beacon or carrier signal.

[Please Send Us Info as Below;]

  • The screenshot proves your success recording the signal or telemetry data.
  • The date and location(country) when you record.
  • We could introduce you on our HP or SNS, if you could inform us your receiver equipment and the above.
Either via email or Twitter DM. Of course, with your callsign!

The Operation of SP-Communication

OM turns on the power of SP before separating from OM. Until landing on the Moon, SP emits radio waves with FM modulation by the 3-axis accelerometer in SP. In FM mode, it occupies about 100kHz bandwidth. After landing, the transmission mode is automatically switched to PCM-PSK/PM and sends the digital telemetry.

[Please Send Us Info as Below;]

  • FM mode: Please record the analog data in 100kHz bandwidth. Center frequency is 437.41MHz.
  • PCM-PSK/PM: The screenshot proves your success recording the signal or telemetry data.
  • The date and location(country) when you record.
  • We could introduce you on our HP or SNS, if you could inform us your receiver equipment and the above.
Either via email or file server. Of course, with your callsign!

Orbit Information

[updated on 2022/1/3 JST]
The launch day is now scheduled at March 2022.
Rocket Launch: March 2022 TBA (kennedyspacecenter.com)
The orbit format is TLE (two line elements). As soon as the launch date and orbit information is confirmed, it will be announced on this page and SNS (twitter, facebook).

The diagram of Ground Station (Wakayama & JHRC)

Ground Station

SNS

Address [English]

  • address: 252-5210 ISAS, Yoshinodai 3-1-1, Sagamihara-shi Chuo-ku, Kanagawa in Japan
  • [Direct to JAXA Ham Radio Club] torii.wataru "at" jaxa.jp
  • convert "at" to @ on sending mail

Address [Japanese]

  • 住所: 252-5210 神奈川県相模原市中央区由野台3-1-1 宇宙科学研究所
  • [JAXAアマチュア無線クラブ直通] torii.wataru "at" jaxa.jp
  • "at"を@に置き換えてメールください