re: Ground-Penetrating Radar Finds Water on Mars

Space/Science » in reply to Ground-Penetrating Radar Finds Water on Mars

bruced — 3/17/2007 5:57:06 AM (archived)

Its all to do with the dielectric constant of the materials. Dry rocks and ice are around 1- 4 whereas water is around 80. So along as the ground is dry you'll get good penetration but if things get wet (eg earth) penetration depths get much smaller. Hence on earth to look deeper for oil, etc, we use seismic waves but on Mars GPR works well.

The whole thread (13 posts)

Ground-Penetrating Radar Finds Water on Mars - SDF - 3/17/2007 12:06:42 AM
- Ground-Penetrating Radar "Finds" ICE on Mars - nick hoffman - 3/18/2007 11:43:09 PM
- How much of Mars have they scanned in this way so far? (n/t) - TB - 3/17/2007 7:45:07 PM
  - re: MARSIS - Raoul - 3/18/2007 4:01:00 PM
    - Wrong - Buck Galaxy - 3/19/2007 4:53:07 AM
      - Here is a very recent article - Buck Galaxy - 3/19/2007 5:06:38 AM
        
        Yo Nick... Still sure there's no groundwater? (n/t) - Buck Galaxy - 3/20/2007 2:59:30 AM
        
        Am I sure, no, but... - nick hoffman - 3/20/2007 5:16:24 AM
        
        Thanks for that Nick - Buck Galaxy - 3/20/2007 6:31:38 AM
        
        It's all about the science - nick hoffman - 3/20/2007 10:43:16 AM
  - Better question: How much of Afghanistan have they scanned in this way so far? (n/t) - SDF - 3/18/2007 3:54:46 PM
- re: Ground-Penetrating Radar Finds Water on Mars - bruced - 3/17/2007 5:57:06 AM
  - dielectric - nick hoffman - 3/18/2007 11:44:30 PM

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