HARDWARE USED:

-

GTS equipment

• Transmitters of 400 MHz, 1.5GHz band
• Receiver of 450 MHz band
• Antenna unit with attachment mechanism
  for downlink of high-accuracy time signals
• HF cables
  

FLIGHT EQUIPMENT USED:

• Line multiplexer system unit
• TV exchange module

OBJECTIVE:

Reception of a downlinked high-accuracy time signal.

TASKS:

• Installation of electronics unit and connection of the GTS equipment to the ISS service systems, performance of test activation of the GTS electronics unit and transmitters, as well as long-duration (for 658 days) activation of the GTS equipment with a 400 MHz transmitter.
• Testing of time signal generation conditions using special ground receivers.
• Checking the quality of the signal generated on the ground and data transfer rates.
• Measuring disturbing effects of Doppler shift, retroreflections, shading and angle of elevation on the time signal.

EXPECTED RESULTS:

Testing the characteristics and accuracy of a time signal transmitted from a low-altitude near-earth orbit to the ground in real space conditions.