Missions bid to secure comms time on Deep Space Network
The team managing JWST therefore has to negotiate with other groups six months in advance, to schedule time to communicate with and download data from the space telescope.
"The mission scheduler compares those times to what is available in the scheduling system where other missions are competing for time with their spacecraft. All missions require specific amounts of time to communicate with their spacecraft, and the timing depends on where the spacecraft are in space. There are times when multiple missions request the same resource at the same time.
The DSN allocates different types of radio waves to communicate with probes. Instructions are sent to the JWST via the S-band, and its position, trajector, and health are received at this wavelength too. Scientific data, on the other hand, is sent using the more powerful Ka-band frequencies.
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