Sensors & Software Inc. NG250 ユーザーズマニュアル

Noggin

12-Survey & Map Mode

85

The wave velocity depends on the properties of the material. The Noggin software allows the
user to input a velocity, which changes the total time window collected by the system. 

See Section 12.2.11: P.79 for a discussion about determining velocity.

A table of typical radar velocities in various materials is given below.  If in doubt, use a value of
0.10 m/ns.  This is a good average velocity that will provide a good estimate of depth in most
situations.

If units are metres then velocities will appear in metres per nanosecond (m/ns).  If units are feet
then velocities will appear in feet per nanosecond (ft/ns). To change units see Depth Units on
page 85.

The Noggin will accept units in metres/nanosecond or feet/nanosecond depending on the Depth
Units setting.

This is the setting for the units of the horizontal depth lines that appear on the screen. The
available settings are metres, feet or nanoseconds (ns). If nanoseconds are selected the “depth”
lines (see Section 12.2.2: P.71) are actually time lines.

1) metres
2) feet
3) nanoseconds

The Noggin System should be set to the type of Noggin currently in use on the Smart System.
The Noggins available are:

1) Noggin 100

2) Noggin 250

Air

0.300

1.000

Ice

0.170

0.558

Dry Soil

0.130

0.427

Dry Rock

0.120

0.394

Soil

0.100

0.328

Wet Rock

0.100

0.328

Concrete

0.100

0.328

Pavement

0.100

0.328

Wet Soil

0.065

0.213

Water

0.033

0.108