Martian Air Pressure, How much variance is there? Options

[nprev]

Just thinking when looking at the Victoria pics...how much does the average air pressure increase with respect to the surrounding area at the bottom of the crater? Also, where is the lowest point on Mars (which also presumably has the highest air pressure)? I can't remember if it's in Hellas or Coprates Chasma.

Rationale here is that, given MRO's astonishing capabilities, these low areas should be given priority for long-term monitoring; if transient surface water exists anywhere, it's probably way down in a crater or a canyon.

[djellison]

So - propeller based drones can work on Mars ( and one is proposed to accompany the 2020 rover ) . https://mars.nasa.gov/news/helicopter-could...for-mars-rovers

Winged drones have been proposed ( see the ARES scout proposal ) https://en.wikipedia.org/wiki/Aerial_Region...onmental_Survey

The balloons of the kind used for EDL are far far too heavy to be used for lift. Even bespoke balloons are pretty marginal on performance, but they are possible. http://www.gaerospace.com/wp-content/uploa...ars-Aerobot.pdf