Cogo; Inverse Calculation - Horizon Fitness HTS-580 Series Operation Manual

7.11 COGO

COGO is a mulfuntional math calculation tool. Using it, you can directly make a
seies of calculation in the open field,
remember the complex formula.
The calculation methods of COGO: inverse calculation, positive calculation,
intersection, calculating the bias point, calculating the pedal. Press the key "F4" in
page 3 of the measurement program, select an exist coordinate file or creat a new
coordinate file, and then enter the interface of selecting the COGO calculation
methods.

7.11.1 Inverse calculation

N
P1
122
P2
d1
d3
α
d2
and don' t n eed the calculator or to
Known：
P1 the first known point (start point)
P2 the second known point (end point)
Unknown：
α the azimuth from P1 to P2
d2 the HD between P1 and P2
d3 the VD between P1 and P2