Martian Air Pressure, How much variance is there? |
Martian Air Pressure, How much variance is there? |
Oct 1 2006, 04:46 PM
Post
#1
|
|
Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
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. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
|
|
|
Dec 3 2016, 06:22 PM
Post
#2
|
|
Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
In figure 2 we see in these summary statistics that Viking was around a few percent: http://journals.ametsoc.org/doi/pdf/10.1175/JAS3718.1. I would suppose this ratio could be larger at high altitudes where aerobraking is being considered.
On Mars the semidiurnal tide is generally stronger than the diurnal tide, kind of like ocean tides on Earth. I recall this being discussed by Conway Leovy during my internship on the mission. Here is an example for Viking & Pathfinder over a few sols: https://mars.jpl.nasa.gov/MPF/ops/ss007.jpg Further discussion of the semidiurnal tide is in this TPS blog: http://www.planetary.org/blogs/guest-blogs...atmosphere.html -------------------- Steve [ my home page and planetary maps page ]
|
|
|
May 18 2017, 10:15 PM
Post
#3
|
|
Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
Would "UP" balloons work on Mars?
Eh, guess this is as good a place as any to ask.... Let's suppose a future mars rover uses bounce airbags for landing. Could those airbags be re-purposed to hoist a balloon drone(s)? Back of the envelope scribbles suggest that thin air on Mars precludes propeller drones, and disfavors winged drones. So, what about an "UP" mission? A balloon hoisted-but-tethered eye in the sky hoisted over the rover by multiple balloons? Or a "dandilion" probe, each balloon that survives gets re-inflated with a small science payload, and goes its own way. |
|
|
Lo-Fi Version | Time is now: 24th September 2024 - 05:57 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |