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 TLE for the "Max Valier Satellite" are the following (update, 2017-09-23):

MAX VALIER SAT          
1 42778U 17036P   17265.94826566  .00001205  00000-0  58130-4 0  9991
2 42778  97.4420 324.5995 0011198 287.0383  72.9625 15.20587188 13880

Also, you can download the TLE as a text file. For automatically updated TLE information check out this link.

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.