EVALUATING THE ACCURACY OF A GRAVIMETRIC SURVEY 



155 



To derive these relationships in the right-hand sides of formulae (25) and (28), 

 ZljQ must be replaced by its value from formula (19). The nomogram (Fig. 9) 

 is used for </> < A^q, the nomogram (Fig. 10) — for A^q </j < 2z1iq. 



1-0 



10 8 



2 0-5 0-6 0-7 0-8 0-9 10 



P 

 Fig. 10. 



To determine the total error E^ as a function of— and — according to 



formula (29) the nomogram of Fig. 11 is used. 



To determine the total error D^ for the condition </? < A^q according 

 to formula (30) t-svo nomograms are given (Figs. 12 and 13) : the first for 



0-18 

 0-16 

 0-14 

 0-12 

 010 

 008 

 0-06 

 004 

 002 



0-1 0-2 0-3 0-4 05 0-6 07 08 09 







^0 



Fig. 11. 



