摘要:

AbstractThis is a review article which explains and distinguishes between the different time systems now in use, and shows how modern time signals are controlled and how the geodesist should use them. The work and recent history (in context) of BIH, SIR, SIL, and IPMS are outlined.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.143.2

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractIn an investigation into altimetry errors, consideration was given to the nature and behaviour of the isobaric surface. From the evidence obtained there are indications that there is a relationship between the problems of heighting by vertical angles and altimetry, and that there is corroboration for this evidence by other experiments conducted to investigate the coefficient of refraction of air.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.143.19

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractThe advent of the electronic computer has brought the problem of the solution of simultaneous linear equations to the fore, particularly in regard to the solution of symmetrical equations such as normal equations in least squares solutions. The object of this paper will be to remind readers of some of the usual ways of solving simultaneous equations, and then to discuss in greater detail the solution of normal equations by the Gauss–Doolittle, Cholesky and other methods with modifications and explanations.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.143.22

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractThe residual errors obtained, after the adjustment of sequential misclosures, in four different survey processes, are analysed by the method of least squares. Values are obtained for the average error of each of the residual error distributions, on the assumption that the latter are normally distributed. The results are expressed in terms of the estimated accumulation of average error (ea) over the types of sequences considered. The samples are further subdivided according to the sequential position at which errors occur and least squares solutions effected for the average error of the normal distribution which fits the observed error distribution.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.143.38

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

AbstractDescription of the instruments, and some comments on experience gained in using them for the Caithness Base Investigation.

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.143.43

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.143.47

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1967.19.143.48

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor