User's Manual

DIGITAL CONTROL INCORPORATED
DigiTrak Falcon

F2

Operator’s Manual 71
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
Depth Estimation Table
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