OKM??

[99thpercentile]

I have no idea what type of "geophysical" instruments OKM manufacturers. I contacted them once to ask what geophysical principle(s) their instruments operated under (electromagnetic induction, magnetometry, or ground penetrating radar) but didn't get an answer. Any real manufacturer of geophysical instruments will have extensive documentation of the specific method at each instrument operates under as well as lots of details about the specific details of the instrument. For example a manufacturer of a time domain electromagnetic induction metal detector will list the type of transmitter pulse, the shape of the pulse and the duty cycle. They will list the number of time gates, the width of the time gates and the time of the beginning or center of the time gate. They will list the number of transmit cycles per second as well as any analog or digital stacking (averaging). Then they will give you detailed information about the data file structure, all real geophysical instruments save the data.

Any company attempting to sell you an instrument that is more complex than a handheld metal detector that doesn't give all of the above information is most likely hiding something. A simple test is to see if the instrument is being used by commercial geophysical companies, ask for a list of companies using the instrument. If a vendor doesn't readily supply a list of current commercial users with contact information, ask yourself why.

I'm very confused about Frankn's comments, if he did work on government projects using airborne sensor platforms it definitely wasn't in a science or engineering capacity. He doesn't seem to know the difference between the global positioning system (GPS) and ground penetrating radar (GPR). GPS is how you know where your data was collected, I typically use a $50K Trimble 5700 or R8 RTK GPS system to position my data to <1cm accuracy for geophysical surveys. GPR is a great tool in specific situations, but I have never seen it used successfully to locate a 20 ft deep tunnel on the border (my group has the lead for this issue for DoD). Airborne GPR systems are typically synthetic aperture radar (SAR) systems and they can be very useful, but don't typically have very much depth penetration (<2m). I have some spectacular GPR results from some sites and very poor results from other sites. GPR is just one tool in the geophysicists toolbox, the selection of the correct tool is based on: site geology, type of target, size of target, depth of target, and the contrast of one or more physical properties between the target and the host medium. One tool never fits all sites or situations.

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[Frankn]

99TH I admitt I mistakenly typed GPS instead of GPR " now corrected" But if you were in DoD you must know about the LaCross sats. which had GPR. I know this goes back over 15 years, but the files must still exist. The weather sat might not be an open subject yet.I did not work for the gov. I worked for a contractor.

[HiiiQ]

Frankn. GPR in space is able to detect large anomalies like mineral deposits,large ancient ruins,underground cities in Russia,etc. Not cannonballs and graves like you claim. This is just mumbo-jumbo,that those in power are spreading to make the Russians think that the U.S. has some superior technology. Just like the Roswell fiasco. If you were a few steps higher in the food and IQ chain you would know what I'm talking about.

[Frankn]

HiiiQ The U.S. does have superior technology that you probably can't imagine even in your dreams. As for Roswell, the orginal report was right.I have interviewed Army Airforce personal that were there at the time. By the way, your E-Mail address describes you perfectly!

[GUESS-WHO]

My understanding is that the OKM is just a magnetometer. Also, they manufacturer LRL's........need I say more?

[kaloy]

The financer of my project spent Php 60,000 for the rental of OKM EXP4000... the readings were good as depicted in the 3d graphics of the machine.... the graphics showed that the target had sharp edges as in a rectangle BUT only to find out that those were just piles of manganese rocks.....

[GUESS-WHO]

Manganese .... magnetometer .... I rest my case.

[Vox veritas]

Hi,
I can attest to having seen use OKM I 160 in Latin America, highly mineralized ground and it worked great locating tunnels 14 meters deep. The person using this machine told me that reached 20 meters.
This same person told me to be able to use properly the OKM. He also said that there are certain rules of use that he has discovered. In short, this person is very happy with OKM. I think buying one soon.
Sincerely VV

[GUESS-WHO]

I have no idea what type of "geophysical" instruments OKM manufacturers. I contacted them once to ask what geophysical principle(s) their instruments operated under (electromagnetic induction, magnetometry, or ground penetrating radar) but didn't get an answer. Any real manufacturer of geophysical instruments will have extensive documentation of the specific method at each instrument operates under as well as lots of details about the specific details of the instrument. For example a manufacturer of a time domain electromagnetic induction metal detector will list the type of transmitter pulse, the shape of the pulse and the duty cycle. They will list the number of time gates, the width of the time gates and the time of the beginning or center of the time gate. They will list the number of transmit cycles per second as well as any analog or digital stacking (averaging). Then they will give you detailed information about the data file structure, all real geophysical instruments save the data.

Any company attempting to sell you an instrument that is more complex than a handheld metal detector that doesn't give all of the above information is most likely hiding something. A simple test is to see if the instrument is being used by commercial geophysical companies, ask for a list of companies using the instrument. If a vendor doesn't readily supply a list of current commercial users with contact information, ask yourself why.

I'm very confused about Frankn's comments, if he did work on government projects using airborne sensor platforms it definitely wasn't in a science or engineering capacity. He doesn't seem to know the difference between the global positioning system (GPS) and ground penetrating radar (GPR). GPS is how you know where your data was collected, I typically use a $50K Trimble 5700 or R8 RTK GPS system to position my data to <1cm accuracy for geophysical surveys. GPR is a great tool in specific situations, but I have never seen it used successfully to locate a 20 ft deep tunnel on the border (my group has the lead for this issue for DoD). Airborne GPR systems are typically synthetic aperture radar (SAR) systems and they can be very useful, but don't typically have very much depth penetration (<2m). I have some spectacular GPR results from some sites and very poor results from other sites. GPR is just one tool in the geophysicists toolbox, the selection of the correct tool is based on: site geology, type of target, size of target, depth of target, and the contrast of one or more physical properties between the target and the host medium. One tool never fits all sites or situations.

Very well said, especially when in the context of the soil conditions in the Philippines.

[Vox veritas]

Images of a tunnel in Paraguay
Were obtained with the OKM I 160. The dark blue part corresponds to the tunnel. Undoubtedly, if you know how to use the OKM is an important tool of work to achieve goals.
Cheers V. V.

[Vox veritas]

Hi.
Someone with extensive experience is willing to use the OKM in Paraguay to recover treasures? Our society is willing to pay the expenses and a percentage of the recovery. We have signed agreements.
Cheers VV

[GUESS-WHO]

Hi.
Someone with extensive experience is willing to use the OKM in Paraguay to recover treasures? Our society is willing to pay the expenses and a percentage of the recovery. We have signed agreements.
Cheers VV

Save your money, 99thpercentile is right.

[Great Alex]

Hi to all

OKM devices are excellent for detecting caves , graves , voids in soil
they have poor ability on fresh buried targets that the halo effect not happend to them

the depth that visualizer 3d software shows you is not true depth
it's a signal power and the colors show the strongest(red) or weak(blue) signal
red doesn't mean metal it means a strong signal in your scan area probably a metal or mineral

always the large dimension scan with more resolution help you to get better result
at least one side of scan is better 4-6 time bigger than the maxim dapth that you need

and the future 2005 and I-160 works better on voids

HH

[btobmw]

After researching the OKM EXP 4000 and some of the other products they carry, I still cant come to a conclusion on if I want to purchase th exp or something may be more "reliable" such as the minelab 4500. Im searching in areas with lots of minerals and not that much trash. Im lookin in depths of 10-30 ft deep, and looking for larger sized treasures. Im not really doubting the capability of each of the machines I just want to make sure the okm is reliable. or should I just spend less money for something thats not as advanced but works better?

I've owned The okm 4000 for about 4 years. I purchased from Kellyco detectors in Florida. I've developed some experience on my own, since Kellyco offers you a VERY limited training in their facilties. I started doing my scans using my intuition becouse the owner manual does not tell you many things.
I buried an metalic target in a neutral soil in 3 feet deep and draw a grid 10 by 10 feet 12" by 12" squares. First thing I found accuracy is very important in scanning. The most accuracy, the best results.
You will not find very much in the okm screen. The best starts when you transfer the images to the computer and start playing with the 3d visualizer software. It is very impresive. But also, you have to learn on the go, like a video game.
I recently discover something new. It doesn not detect metal targets with no corrotion on them. I was doing a control scan and buried a piece of new metal and detect metal comtamination instead,(cans, pennies nails etc.), buried in the place for long time.
I personally like the technology. Im not interested in finding little things in parks and beaches. My targets are buried treasures, mainly in Mexico, and the metal detectors I used before did not give me more than 2 or 3 feet deep penetration. I've tested the 4000 up to 10 feet deep and gave me good results. My believing is if I have not find good metal yet, I've looking in the wrong places. GOOD LUCK

[Ammonhotep]

I've been reading these posts for a while, and really, the proof is in the pudding. I want to see pictures of gold. So, come on! Post.

[woof!]

OKM is not just "a product", but the name of a company with a variety of products.

Funny things about this company.

1. Their advertising does not explicitly state what the products actually are or on what basis a customer can reasonably expect them to have certain capabilities.

2. The result has been a lot of controversy on forums about the products because not even people who say they've used them seem to know what they are, or can explain what their capabilities actually are.

3. The company seems to prefer this sorry state of affairs, rather than to clear it up. It's obviously quite intentional.

4. At least one of their products is recognizably in the "LRL" category, in other words (and in plain English) fraudulent.

This is all in the "read the advertisement!" category. What OKM is telling the world, is that their stuff is either nearly worthless or worse than worthless, so the only kind of customers they want are folks who have lots of money but who know so little about underground detection apparatus that if the customer is the victim of a con game they won't realize that the problem is OKM and not the customer.

If that's not what they want to tell the world, all they have to do is explain what the heck their products really are. Doesn't have to cost them anything, they can explain it right here on Tnet for free.

--Dave J.

[Tigue710]

So I hear a lot of bad things about OKM's manometers, I have to say I'm quite happy with the futre 2005. For what I'm using it for it Awesome! I'm still new to the unit though and hoping some of people who have posted positives on here and use one could help me out with the software? Thank you