Search found 130 matches

by 99thpercentile
Sun Jul 14, 2024 12:40 am
Forum: Buy, Sell or Trade
Topic: Sick of MEMS and gyro ad spam
Replies: 1
Views: 831

Re: Sick of MEMS and gyro ad spam

Agree
by 99thpercentile
Sun May 19, 2024 7:57 pm
Forum: Buy, Sell or Trade
Topic: Juniper Systems Mesa 3 unit for sale
Replies: 0
Views: 850

Juniper Systems Mesa 3 unit for sale

I have a Juniper Systems Mesa 3 unit for sale. I purchased this unit for a project last summer and am upgrading to the Mesa 4. This was only used on a single project so that I could have the UTV driver using Geometrics MagLog for real time path following and the passenger could have another unit for...
by 99thpercentile
Sun May 12, 2024 11:08 pm
Forum: Near Surface Geophysics
Topic: 4 ERT profiles crossing each other (2D to 3D)
Replies: 3
Views: 2450

Re: 4 ERT profiles crossing each other (2D to 3D)

If you have a current license for RES2DINV, it should include limited functionality of RES3DINV that includes merging multiple RES2DINV profiles.
by 99thpercentile
Mon Apr 01, 2024 10:17 pm
Forum: Buy, Sell or Trade
Topic: Geophex Gem-2 Broadband EMI
Replies: 3
Views: 2361

Re: Geophex Gem-2 Broadband EMI

If you want to see comparisons of a lot of different instruments at multiple test sites, here is a link to a project I worked on a number of years ago. Geophysics for Military Construction Projects https://apps.dtic.mil/sti/citations/ADA531964 https://apps.dtic.mil/sti/pdfs/ADA531964.pdf We used Geo...
by 99thpercentile
Tue Jan 30, 2024 6:05 pm
Forum: Buy, Sell or Trade
Topic: iGage iG3s Static GNSS Receiver for Sale $1000
Replies: 0
Views: 685

iGage iG3s Static GNSS Receiver for Sale $1000

I have an iGage iG3s Static GNSS Receiver for Sale. This unit is great for collecting static data on a point, then processing it through OPUS to ensure that you have a known point on your site. I used it a lot, but have purchased new equipment. This unit comes with a simple program to download the d...
by 99thpercentile
Tue Jan 30, 2024 5:57 pm
Forum: Buy, Sell or Trade
Topic: GSSI Survey Wheel
Replies: 0
Views: 714

GSSI Survey Wheel

I have a GSSI survey wheel for sale. I sold the rest of the system but the buyer didn't want it as they were just going to use the 3-wheel cart.

$500 or best offer
by 99thpercentile
Tue Jan 30, 2024 5:21 pm
Forum: Buy, Sell or Trade
Topic: GSSI 80 MHz antenna for sale
Replies: 0
Views: 812

GSSI 80 MHz antenna for sale

I have a unique low frequency GSSI antenna available for sale. This think is huge, look at the pictures. I tested it in January 2024 with a SIR-4000 controller and it worked fine. If you already have a SIR-3000 or SIR-4000 and need to do some deep surveys, this is for you. I would like to ask $2000 ...
by 99thpercentile
Thu Jan 04, 2024 12:42 am
Forum: Buy, Sell or Trade
Topic: GSSI SIR-3000 3-wheel cart w/ 400 MHz antenna
Replies: 4
Views: 1807

Re: GSSI SIR-3000 3-wheel cart w/ 400 MHz antenna

I know of a unit available for $9500, is anyone interested? If not, do you want to make an offer?
by 99thpercentile
Wed Dec 27, 2023 6:20 pm
Forum: Buy, Sell or Trade
Topic: GSSI SIR-3000 3-wheel cart w/ 400 MHz antenna
Replies: 4
Views: 1807

Re: GSSI SIR-3000 3-wheel cart w/ 400 MHz antenna

Would there be any interest at $9500 for this system?
by 99thpercentile
Thu Dec 07, 2023 11:12 am
Forum: Buy, Sell or Trade
Topic: GSSI SIR-3000 3-wheel cart w/ 400 MHz antenna
Replies: 4
Views: 1807

GSSI SIR-3000 3-wheel cart w/ 400 MHz antenna

What does everyone think this system is worth today? I sold my similar system when I purchased a GSSI SIR-4000 w/ 350 HS antenna, which was a few years ago. I have a harder time estimating was several generation old equipment is worth. Someone I know wants to sell this older system. Thanks for the f...
by 99thpercentile
Sun Oct 22, 2023 11:06 pm
Forum: Near Surface Geophysics
Topic: Water detector
Replies: 1
Views: 1730

Re: Water detector

The only geophysical method that can directly detect water is nuclear magnetic resonance (NMR). Unfortunately, its detection range is very small so while it can work in the field, it works best as a borehole method. Vista Clara in Washington state, USA is the primary manufacturer of these types of i...
by 99thpercentile
Sat Oct 14, 2023 10:41 pm
Forum: Buy, Sell or Trade
Topic: GSSI SIR-4000 with 400 MHz antenna and 3-wheel cart
Replies: 0
Views: 921

GSSI SIR-4000 with 400 MHz antenna and 3-wheel cart

I have the following for sale for $19,500.00 USD.

GSSI SIR-4000 GPR controller
GSSI 400 MHz antenna
GSSI 3-wheel cart
GSSI tow handle
GSSI survey wheel
GSSI cables for system
Shipping case
by 99thpercentile
Thu Sep 21, 2023 3:12 pm
Forum: Buy, Sell or Trade
Topic: Geonics VLF EM16 Operations Manual
Replies: 3
Views: 5739

Re: Geonics VLF EM16 Operations Manual

Here is a PDF copy of the Geonics EM16 user manual. You can get any document like this from Geonics just by contacting them and asking.
by 99thpercentile
Mon Aug 28, 2023 7:05 pm
Forum: Near Surface Geophysics
Topic: Groundwater search in North-Africa, which technique?
Replies: 11
Views: 12687

Re: Groundwater search in North-Africa, which technique?

I agree with the comment above about combinations of methods. That is always the best approach to take in geophysics. I also agree with the comment about basic vertical electrical soundings (VES) being useful. If you have little money but lots of time, VES is very cost effective. I also suggested VL...
by 99thpercentile
Sat Jul 22, 2023 8:42 pm
Forum: Near Surface Geophysics
Topic: Groundwater search in North-Africa, which technique?
Replies: 11
Views: 12687

Re: Groundwater search in North-Africa, which technique?

Based on your rather small budget, I would suggest looking for a used very low frequency (VLF) instrument such as a Geonics EM-16 or ABEM Wadi. VLF can be a powerful screening too looking for conductive targets at depth or a linear conductive anomaly. The VLF method can cover large areas quite quick...
by 99thpercentile
Sun Apr 23, 2023 10:38 pm
Forum: General Geophysics and Geoscience
Topic: How to do this ?
Replies: 9
Views: 4813

Re: How to do this ?

How did you deploy your magnetometer? The reason I ask is that every archeological magnetometer that I am aware of is a fluxgate gradiometer. Most geophysical magnetometers are total field single sensors. The geophysical magnetometers can usually be deployed as a gradiometer if you have multiple sen...
by 99thpercentile
Sat Mar 18, 2023 4:10 pm
Forum: Buy, Sell or Trade
Topic: GSSI SIR-4000 w/ 400 MHz antenna and 3-wheel cart
Replies: 0
Views: 3981

GSSI SIR-4000 w/ 400 MHz antenna and 3-wheel cart

I have a GSSI SIR-4000 w/ 400 MHz antenna and 3-wheel cart for sale. The system will include the shipping cases (shown in a picture that includes some other cases as well that are not included) that we have to ship the system, and could also include an extra survey wheel if you prefer to pull your a...
by 99thpercentile
Tue Mar 14, 2023 6:30 pm
Forum: Buy, Sell or Trade
Topic: GSSI Profiler EMP-400 electrical conductivity profiling unit for sale
Replies: 1
Views: 3837

GSSI Profiler EMP-400 electrical conductivity profiling unit for sale

I have a GSSI Profiler EMP-400 electrical conductivity profiling instrument for sale. The Profiler is a multi-frequency frequency domain electromagnetic induction (FDEM) instrument. The Profiler is a lighweight, man carried instrument for investigating the shallow subsurface. The operator can contro...
by 99thpercentile
Mon Feb 13, 2023 11:21 pm
Forum: Buy, Sell or Trade
Topic: EM38-MK2 for Sale
Replies: 8
Views: 5401

Re: EM38-MK2 for Sale

I am interested, can you send pictures to my email?
by 99thpercentile
Mon Jan 09, 2023 6:53 pm
Forum: Buy, Sell or Trade
Topic: US Radar Quantum Imager Triple Frequency GPR System
Replies: 0
Views: 1321

US Radar Quantum Imager Triple Frequency GPR System

I was asked to help someone sell their US Radar Quantum Imager Triple Frequency GPR System. Apparently the company hired someone and they approved their purchase of the Quantum Imager Triple Frequency GPR System for $32,995.00 which includes the GPS receiver and all of the standard accessories. The ...
by 99thpercentile
Mon Oct 24, 2022 8:30 pm
Forum: Buy, Sell or Trade
Topic: Gssi sir 3000 Needed
Replies: 2
Views: 1964

Re: Gssi sir 3000 Needed

Do you just want a controller or a complete system? I have a conplete SIR-4000 system with 400 MHz and 3 wheel cart.
by 99thpercentile
Sat Oct 22, 2022 8:00 pm
Forum: Near Surface Geophysics
Topic: Siting Nuclear Reactors
Replies: 2
Views: 4294

Re: Siting Nuclear Reactors

There is already a lot of information available online for site geology from the USGS as well as Vs30 seismic site classification data at a coarse scale. I would explore all of that first as having me send a field crew to multiple 50 acre sites would be really expensive. You would want to reduce the...
by 99thpercentile
Wed Aug 10, 2022 11:05 am
Forum: General Geophysics and Geoscience
Topic: Geophysics PhD and job prospects
Replies: 1
Views: 3547

Re: Geophysics PhD and job prospects

You can contact me if you want some feedback on your situation. I went straight through for my BS and MS and then worked full time in near surface geophysics R&D. I did my PhD while working full time so it took a long time. I currently work in near surface geophysics consulting, which does not r...