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Hi all,
It's now a long time that we posted any comment on this forum.
However, the normal sales and support activities related to our PPM MarkIVC are going on.
The only sizable info we could report at thispoint about the underwater sensor is that we have improved it one step further by using an hermaphroditic panel connector used in the professional diving industry (www.wet-connect.com). It is rated for a depth of 10000ft.
For underground surveys, the weight of the sensor is an important factor. Thus, We had switched for coil winding using aluminum wire which gives a considerable weight advantage.
However, the minus side of that is that this type of wire has a higher electrical resistance and thus, gives less polarization current for the same power voltage.
For the underwater surveys, the weight is not important (it is even better to get an heavier sensor), thus, we have switched back to the standard copper wire.
We have also very much upgraded and improved the PPM Utility program for both underwater and underground surveys in real-time operation and in post-processing.
This program can now accept the NMEA data stream from an external GPS replacing the integrated GPS.
It also can complement the GPS data from the integrated GPS with the depth data (as NMEA sentences) coming from a sonar and plot it along with the PPM data.
We have upgraded the generation of survey paths and waypoints including the automatic generation of full survey routes made of parallel survey lines based on a reference waypoint.
For the post-processing of grid-shaped survey files, we are now able to interpolate the readings and generate/display on this program 2D contoured, colored grids (exactly as Surfer does it).
These grids can then be scanned by the program to locate and mark potential targets as monopoles and dipoles with a measurement of their height and surface.
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