摘要:

AbstractOnce the directions to the fictitious satellite point have been established, then the satellite measurements and the photogrammetric contributions to them can be regarded as complete. The subsequent calculation of the network, and the co-ordination of the geometric network with the geoid, are both problems in higher geodesy, where it is unimportant how the individual observation elements were arrived at, as long as the measured values which are taken into the calculations are uncorrelated. As will be shown later, this is not the case under certain specific assumptions. To round up the whole exercise we shall briefly describe all the problems related to the network calculations as well as their principal solutions in so far as they are covered by satellite geodesy.

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.202

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

AbstractThe writer has been approached by several surveyors recently with the request that he suggest a method of least-squares adjustn1ent of a traverse suitable for use on electronic computers, which are becoming increasingly available to many surveyors. Thus stimulated, he found the method outlined in this paper, which was first suggested in English surveying literature by H. L. P. Jolly (3) who ascribed the original credit for the method to Jordan (4).This method entails the forn1ation of three correlative normal equations, which may be reduced to two by an elegant refinement in the computations. The derived correlates are employed to compute the most probable corrections to be applied to the observed angles and measured distances. Making certain assumptions, it is shown that only one weight coefficient is required, and methods are suggested whereby this may be determined empirically. The theory is illustrated by means of a numerical example, which demonstrates that the adjustment may also be carried out on a desk calculator without undue expenditure of time or space. Comparisons are made between the Least Squares method suggested and the Bowditch method.

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.218

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

AbstractA previous note gave an approximate method, which has advantages when the angles are small, of calculating the difference in level observed by vertical angle observations with a theodolite. In the present note a better formula is developed for reciprocal observations and a more accurate method is given for quickly getting a closer approximation than before; the accuracy over a range of angles and distance can be estimated from a diagram. Slide rule accuracy is sufficient for most of the calculations.The method previously given for investigating obstructions to the line of sight is presented again in the light of the additional accuracy given by the modified formula.

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.230

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

摘要:

AbstractA discussion of various checking methods, mostly for use in logarithmic computation.

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.238

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.242

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.246

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.247

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1970.20.155.248

出版商:Taylor&Francis    

年代:1970

数据来源: Taylor