Electromagnetic survey : looking for information

[Atul Asthana]

I am looking for information on EM survey, specially for archaeological use : papers, DIY equipment, circuits etc. I have been doing a lot of search on internet and have been discussing with some archaeologists.

Thanks in advance.

[Qiaozhi]

I am looking for information on EM survey, specially for archaeological use : papers, DIY equipment, circuits etc. I have been doing a lot of search on internet and have been discussing with some archaeologists.

Thanks in advance.

A good starting point would be "Seeing Beneath the Soil (prospecting methods in archaeology)" by Anthony Clark -> https://www.amazon.co.uk/s/ref=nb_sb...+anthony+clark
Also, check eBay for cheaper prices -> https://www.ebay.co.uk/sch/i.html?_f...clark&_sacat=0

[Atul Asthana]

Thanks George.
I am also interested in building a two box (or any other variety, except GPR) device. Will be grateful if some articles on electronics, construction and setting up can be referred.

[Qiaozhi]

Thanks George.
I am also interested in building a two box (or any other variety, except GPR) device. Will be grateful if some articles on electronics, construction and setting up can be referred.

2-box:
http://www.geotech1.com/cgi-bin/page...eker/index.dat
Magnetometers:
http://www.geotech1.com/cgi-bin/page...&file=main.dat
Geophysics:
http://www.geotech1.com/cgi-bin/page...&file=main.dat

[Atul Asthana]

Thanks once again.
I had gone thru these links earlier too. Good information.

I'd request if some one can provide more design ideas or technical description of some working equipment.

[homefire]

You don't mention the Goal. What are you trying to do?

[Atul Asthana]

This is for archaeological survey of existin/suspected sites. Depth 1-5 mts. river silt/sand.
Looking for buried structures : brick/packed earth, may be some metal, fired pottery etc.

[Altra]

This company's products alway interested me. It seems the circuits could be built by someone with a good knowledge of metal detector design. The 3d data processing software for the pc scared me away.

http://www.geophex.com/Product%20-%2...eld%20GEM2.htm

How it works

http://www.geophex.com/Pubs/gem2_-_h...s_detailed.htm

[Atul Asthana]

Altra, Great.
Thanks for the links.
It helped me understand the design principles.

[homefire]

Sounds like a some what fancy Multi Freq TR detector with data logging. Eaaaa ? Probably Txing One Freq and Harmonics there of. Receiver Notch tuned to the same. Up to ten channels. There are more then a few 3D data logging programs to be had.