The network is being adjusted using the method of adjusting the measurements intermediately with the conditions. The horizontal distances and the horizontal angles are used as the intermediating quantities. The linearized model of the adjustment is determined by the formula
D v = A h - l,
where D is the matrix of the linear operator of the transformation of the measured quantities to the intermediating quantities, v is the vector of the corrections of the geometric quantities, A is the matrix of the linear operator of the network design h is the vector of the configuration correction and l is the vector of the right sides of the linearized network module
under the condition
vT* P v = min
The model is solved under the additional conditions for the approximate configuration condition, which can be written in the form
G h = 0
The configuration correction solution is then determined by the formula
h = (AT P A + GT G)-1 AT P l = N-1 AT P l
During the calculation, the program performs various controls, and stores the results in a record.
Among the controls belong:
Inversion control (two standards for the residual matrix),
Control of the condition G h = 0,
Vector A standardT P w = 0,
Double calculation of the geometric quantity corrections,
Double calculation of the intermediating quantity corrections,
Double calculation [pvv],
Control calculation wT P w.
Besides this, the program performs various internal controls of input data consistency.
The calculated geometric quantity corrections are tested for remoteness according to the set risks alpha and beta. When skipping the test, the program calculates the estimate of the error in the geometric quantity. Such an estimate is quite reliable under the condition of the oneness of an error in the measurement file.