ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.2

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

摘要:

AbstractThe direct mean and the weighted mean of repeated observations are compared for various correlations of the data. In addition, the error estimates of the mean values are compared.The investigation shows that the difference between the two types of mean values is expected to be proportional to the standard deviation of each observation, and is significant for a small number of correlated data. The difference decreases with the number of observations and, of course, increases with the correlation. The relative discrepancy between the corresponding error estimates increases with the number of observations and may well reach 50–100% for, say, 10 observations.The theoretical results are confirmed by an application to repeated EDM observations.

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.3

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

摘要:

AbstractBy exploiting the programming potential of modern calculators, geodesic accuracy can be readily and quickly achieved by numerical integration. Tests of the Texas T.I. 58 program included, gave results on a 132 kilometre line which agreed with test data to better than 0″.0001. Typical lines of approximately 30 kilometres were calculated in less than ten minutes.

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.11

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

摘要:

AbstractA new generation of instrumentation and computer software is nearing operational status that is expected to make astronomic radio interferometry an important geodetic method by the early 1980's. Unfortunately, very few professional geodesists have become directly involved in the development or use of the method.This paper introduces some of the basic precepts of radio interferometry using vocabulary and concepts familiar to many geodesists from their experience with electromagnetic distance measurements. Only very basic mathematics is used, with the intent of presenting the material in an easily readable form.

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.17

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

摘要:

AbstractWhile collecting data used in a recent article [1] it was noticed that unexpectedly high values of refraction seemed to be associated with the very shortest lines and that not all of these results could be blamed on mistakes or bad observing. This paper examines the problem more closely using fresh data.

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.32

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.35

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

摘要:

AbstractThis method has been devised specifically for use with calculators that have polar and rectangular co-ordinate conversion facilities. The compact conversion tables provide, without interpolation, the coefficients of a fourth degree conformal polynomial transformation which is accurate to 3 mm at a distance of 200 km from the zone boundary.

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.36

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.45

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.48

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor

ISSN:0039-6265    

DOI:10.1179/sre.1981.26.199.i

出版商:Taylor&Francis    

年代:1981

数据来源: Taylor