Animal wrote: ↑Thu Feb 18, 2021 9:23 pm
11 minute delay? So where are the live streaming videos of it landing? or pics from inside the damn thing?
Nasa needs a production crew to plan this shit out.
Soon.
The limitation right now is the rotation of earth and mars, and the position of the Mars Reconnaissance Orbiter -
https://descanso.jpl.nasa.gov/DPSummary/MRO_092106.pdf
Perseverance carries more electronics on it then any other rover, and the first rover to fully control all phases of flight after launch. It has an antenna that allows for a 2-3kilobyte data connection to the deep space network, a 2megabit connection to the MRO, and the MRO has a 3mb max connection under perfect conditions to the deep space network.
The MRO is over head of the rover 8 MINUTES A DAY.. yes, Nasa planned this landing so the MRO was overhead for that vital 8 minutes, and they planned it a year ago. The second that boosters fired on earth, to landing on Mars almost a year later, millions of miles, so the MRO would be over the landing site.
Only magnets can explain that.
So the rover can only comm with earth a few hours a day, and its slow. It cant really comm at night as the rover requires a lot of additional power to heat the electronics, along with the residual heat from the RTG, so the rover sleeps at night so the heaters can work.
The MRO talks with the rover as well and has a robust 3mb data connection...The UPS guys tablet has a connection 5 times faster. But its only 8mins a day, and the connection is fast, so the MRO relays the data as it can see earth more frequently, and when it cant, it stores the data. But it cant store a lot of data, it was 2005 tech. The MRO has anywhere from 16 minutes to a few hours to talk to earth, depending on the orbit, tilt of Mars and the Earth, etc etc.
The data is there. Getting it to earth is the problem.
Add that the MRO is only 15 minutes a pop, two times a day.