What are the key tasks of a ground station in telemetry data handling?

• A. Ground stations forward data to satellite recall centers.
• B. Ground stations demodulate RF signals.
• C. Ground stations suppress timestamping.
• D. Ground stations receive RF signals, demodulate, time-stamp, store, and forward data to mission operations and analysis systems.

Answer: (D)

In telemetry data handling, the ground station must turn the satellite’s downlink into usable data and get it to the right team. It starts by receiving the RF signals from the satellite, then demodulates that signal to recover the encoded digital data stream. Each data packet is time-stamped to capture the exact reception moment, which is crucial for aligning data with spacecraft events and the mission timeline. The data is stored or buffered to ensure reliability, even when there are brief network gaps, and then forwarded to mission operations and analysis systems where engineers monitor health, analyze science data, and archive records. This full chain—receive, demodulate, time-stamp, store, and forward—is what makes the ground station's role comprehensive in telemetry handling.