Overview

Max Valier Sat carries two amateur radio transmitters. A He-100 transceiver by Astronautical Development, LLC, transmits housekeeping data and photon data by the X-Ray telescope µRosi. A radio beacon by Holger Eckardt DF2FQ transmits a message in CW.

Telemetry

Astrodev Helium-100:

  • The protocol is compliant to the AX.25 unnumbered information frame protocol.
  • Bit rate is 9600 bps, modulation is GMSK.
  • In downlink, the destination call sign is IN3EAE, the callsign of Max Valier School's amateur radio station.
  • In downlink, the source call sign is II3MV, Max Valier Sat's amateur radio callsign.
  • Telemetry downlink frequency is 145,860 MHz (IARU and ITU coordinated).
  • Transmitting power is 5 W.
Flag AX.25 Transfer Frame Header (128 bits) Information
Field
Frame-
Check
Sequence
Flag
Destination
Address
Source
Address
Control
Bits
Protocol
Identifier
8 56 56 8 8 32–2048 16 8
Size is indicated in bits.
Additional information about the AX.25 information field will be published after initial configuration of the satellite is performed.

TLE

The temporary TLE for the "Max Valier Satellite" are the following:

1 99999U          17174.18137315  .00000236  00000-0  96445-5 0 00001
2 99999 097.4484 233.4987 0009379 347.6975 241.8900 15.24361160000012

Alternatlivly, you can download the TLE here.

Radio Beacon

Beacon by Holger Eckardt DF2FQ:

  • Transmit frequency is 145,960 MHz (IARU and ITU coordinated).
  • Modulation is CW:
    • Duration of one dot is 114 ms.
    • Duration of one dash is 342 ms.
    • Interval between words is 1881 ms.
    • Interval between repetitions of the message is 6000 ms.
  • The beacon transmits Max Valier Sat's call sign and a greeting message.
  • Transmitting power is 500 mW.