Shadow Reaper
Space Marshal
You should be nice to me because I am good enough and smart enough, and dog gone it, people like me.
To be fair, the part you are talking about was done online with a free RF Link Calculator, back 6 or 7 years ago. That is the easy, fun part. Now there are so many link calculators online it’s hard to decide on just one. Certainly, 1 watt is enough. The trick is in the gain at the space end. With calculations like this, it is standard practice to put in 7 db “extra” so there are never any problems. IIRC I put in 11 db. It helps that back then, “Software Defined Radio” was running something like -32 db sensitivity. By now it’s probably much higher. It uses a pencil beam which is pretty wide by the time it reaches Earth, and includes a starfinder that just needs to find our planet—something many orders magnitude within its capability. The squiggle motors drive the pointing with sub-micron accuracy, which is again, easily within their capability.
What Musk uses are lasers, which is far better but unnecessary for this application. To talk to Mars you absolutely need lasers and a very advanced starfinder.
View: https://youtu.be/xNx_gU57gQ4?si=F0Ao6Emd7kWkBbkL
To be fair, the part you are talking about was done online with a free RF Link Calculator, back 6 or 7 years ago. That is the easy, fun part. Now there are so many link calculators online it’s hard to decide on just one. Certainly, 1 watt is enough. The trick is in the gain at the space end. With calculations like this, it is standard practice to put in 7 db “extra” so there are never any problems. IIRC I put in 11 db. It helps that back then, “Software Defined Radio” was running something like -32 db sensitivity. By now it’s probably much higher. It uses a pencil beam which is pretty wide by the time it reaches Earth, and includes a starfinder that just needs to find our planet—something many orders magnitude within its capability. The squiggle motors drive the pointing with sub-micron accuracy, which is again, easily within their capability.
What Musk uses are lasers, which is far better but unnecessary for this application. To talk to Mars you absolutely need lasers and a very advanced starfinder.
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