L06-page15 - • Vertical gradient is a maximum of about...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
15 • Essentially a correction for variations in field with latitude and longitude. • If survey is conducted over a large area, correct for changing magnetic field relative to location: • Usually use an IGRF map • Between 30 and 60 degrees north or south (North-South gradient is about 2 to 5 nT/km – East-west grad is 0 to 2 nT/km) Normal Field Correction
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • Vertical gradient is a maximum of about 0.03nT/m at poles and 0.01 nT/m at equator. • Elevation correction • Generally not required for ground surveys • Only in airborne when large elevation changes experienced • Terrain correction • Only comes into play near the base of steep slopes of high k material Elevation and Terrain Corrections...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern