User's Manual

DIGITALCONTROLINCORPORATED
DigiTrak Falcon F5
®
Operator's Manual 73
AppendixD: Calculating Depth Based on
Distance Between FLP and RLP
If you know the transmitter pitch, the positions of the front locate point (FLP) and the rear locate point (RLP),
and if the ground surface is level, you can still estimate the transmitter depth even if the depth information
displayed on the receiver becomes unreliable.
To estimate the transmitter depth, first measure the distance between the FLP and the RLP. The pitch of the
transmitter must also be reliably known. Using the Depth Estimation Table below, find the divider that most
closely corresponds to the transmitter pitch. Then use the following formula to estimate the depth:
Depth = Distance between FLP and RLP / Divider
For example, if the transmitter pitch is 34% (or 18.8°) then the corresponding divider value (from the table) is
1.50. In this example, the distance between the FLP and the RLP is 3.5 m. The depth would be:
Depth = 3.5 m / 1.50 = 2.34 m
Pitch (% / ° ) Divider Pitch (% / ° ) Divider Pitch (% / ° ) Divider
0 / 0.0 1.41 34 / 18.8 1.50 68 / 34.2 1.74
2 / 1.1 1.41 36 / 19.8 1.51 70 / 35.0 1.76
4 / 2.3 1.42 38 / 20.8 1.52 72 / 35.8 1.78
6 / 3.4 1.42 40 / 21.8 1.54 74 / 36.5 1.80
8 / 4.6 1.42 42 / 22.8 1.55 76 / 37.2 1.82
10 / 5.7 1.42 44 / 23.7 1.56 78 / 38.0 1.84
12 / 6.8 1.43 46 / 24.7 1.57 80 / 38.7 1.85
14 / 8.0 1.43 48 / 25.6 1.59 82 / 39.4 1.87
16 / 9.1 1.43 50 / 26.6 1.60 84 / 40.0 1.89
18 / 10.2 1.44 52 / 27.5 1.62 86 / 40.7 1.91
20 / 11.3 1.45 54 / 28.4 1.63 88 / 41.3 1.93
22 / 11.9 1.45 56 / 29.2 1.64 90 / 42.0 1.96
24 / 13.5 1.46 58 / 30.1 1.66 92 / 42.6 1.98
26 / 14.6 1.47 60 / 31.0 1.68 94 / 43.2 2.00
28 / 15.6 1.48 62 / 31.8 1.69 96 / 43.8 2.02
30 / 16.7 1.48 64 / 32.6 1.71 98 / 44.4 2.04
32 / 17.7 1.49 66 / 33.4 1.73 100 / 45.0 2.06
Depth Estimation Table