Baseline definition

This operation defines a baseline resulting from surveying errors. The baseline must be considered like a new reference orbit. It is obtained by two successive operations. In the first a few points on the original reference orbit are chosen as main surveying points. In tunnel construction they could be associated with the surveyor's penetration points. They are accompanied by random x,y,z coordinate errors (usually rather big : say 5 to 10 mm) The second operation defines between the preceding basepoints intermediate points which are obtained by successive aiming from the current point to the next basepoint. This aiming is accompanied by a systematic aiming error (varying from segment to segment) to which is added a random aim error (usually smaller than the systematic error) The origin of the systematic error can be due to the instruments used but also due to ambient conditions under which the surveying is performed. This operation MUST BE PRECEDED by a SEED operation. This operation is still being tested and developped.Use at OWN RISK.

Input format 


BASEline definition 


npen Kxxx Kxxx .... Kxxx 


nsub $\sigma$ 


Kyyy Kyyy ..... Kyyy 

$\sigma_{1} \ \sigma_{2}$

Parameter definitions

npen $\parbox{10cm}{ Number of penetration points }$

Kxxx $\parbox{10cm}{ a set of npen Elements of the KICK type. There MUST be one such kick at the beginning and at the end of the lattice. }$

nsub $\parbox{10cm}{ Number of subdivision points. }$

$\sigma$ $\parbox{10cm}{ the displacement sigma to be used in the generation of the coordinate displacements of the npen penetration points. }$

Kyyy $\parbox{10cm}{ nsub KICK elements defining the intermediate points. They may not coincide with any of the basepoints. }$

$\sigma_{1}$ $\parbox{10cm}{ angular sigma (in radians) of the systematic aim error }$

$\sigma_{2}$ $\parbox{10cm}{ angular sigma (in radians) of the random aim error }$