Linear Time Gain; Position Units - Sensors & Software Noggin 100 User Manual

Noggin
There are 2 types of Stacking Types available: Fixed and DynaQ.
Fixed Stacks
The amount of Fixed Stacking can vary from 1 to 2048 by factors of 2. The default is 4 stacks. For
most surveys, stacking 4 to 32 times is suitable.
Stacking is normally reduced when: 1) the survey objective is looking for very strong responses or 2)
production speed is vital, such as measurements made from a rapidly moving vehicle.
When the system is run in Free Run mode (13.3.2.2: p.98), the user can control the speed the system
collects data by increasing or decreasing the number of stacks. Increasing the number of Stacks has the
effect of slowing down the data collection speed of the system. Decreasing the number of Stacks has the
effect of speeding up the data collection speed of the system.
DynaQ
If the Trigger Method (13.3.2.2: p.98) is set to odometer, one of the Stacking Types is DynaQ.
DynaQ is an advanced, patented technology that dynamically adjusts stacking as the system
movement speed varies. In most situations, moving the system at a comfortable speed stacks
enough to generate data of good quality. In situations where target resolution or maximum
penetration depth is critical, moving slower increases the number of stacks and increases the
data quality.
The DynaQ information for each data line is written to the header (.HD) file.

13.3.1.6 Linear Time Gain

As described in 13.2.6: p.81, the weak signals must be amplified or "gained" to see them on the
display. The Gain button is set to a value from 1 to 9 depending on the amount of gain required (1
is lowest gain, 9 is highest gain).
There is also a second level of gain available to the user and that is the Linear Gain setting. The
default Linear Gain setting of 0.0 is usually adequate for most ground conditions, however, if
advanced users find that they are surveying in areas where high Gain settings are always
required to see data, it may be advantageous to increase the Linear Gain setting.
For the experienced user, the setting indicates the gain increases per nanosecond.
The Linear Gain setting can vary from 0.0 to 5.0 in steps of 0.5.

13.3.1.7 Position Units

This is the setting for the position units used by the odometer. The available options are:
1) meters (default)
2) feet
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13-Survey & Map Mode