This question is about the orbital parameters of ESA's ExoMars Trace Gas Orbiter (TGO), so I am optimisitic that it belongs on astronomy SE. More specifically, it is about the orbital geometry of TGO and how it is Helping Perseverance phone home. Here, Preserverance is the brand new Mars rover which landed on February 18th, 2021.
I know that TGO is on an areocentric orbit, which is the Martian equivalent of a geocentric orbit. I assume that TGO is not areostationary, i.e. not always looking at the same spot on Mars, like many weather satellites (see e.g. Meteosat). Is that assumption correct?
What confuses me is the following paragraph which talks about 24/7 coverage on the one hand, but 14 hours of possible relay-coverage on the other hand. The highlighting in the following quote is from me:
To ensure that this information gets to the engineers on Earth as quickly as possible, TGO and NASA’s Mars orbiters will be able to communicate with deep space ground stations on Earth almost twenty four hours a day, seven days a week for the first two weeks after landing. ESA’s ground station network will provide roughly 14 hours a day of this ‘low-latency’ coverage.
Here, there are time stamps given for "relay slots", and I am unsure how that relates to the above mentioned quote. Any clarification would be appreciated.