Helmert Method as Equivalent of Iterated Almost Unbiased Estimation
Publication: Journal of Surveying Engineering
Volume 127, Issue 3
Abstract
By a minor change in the weighting policy, the complicated Helmert model can be mathematically reduced to an exact equivalent of iterated almost unbiased estimation (IAUE). Such an approach is referred to as the modified Helmert method. It is shown that the Helmert method is identical with IAUE if one works directly with the covariance matrix of the observables instead of estimating the a priori variances of unit weight, as is usually done.
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Information & Authors
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Published In
Journal of Surveying Engineering
Volume 127 • Issue 3 • August 2001
Pages: 79 - 89
History
Received: Mar 15, 2000
Published online: Aug 1, 2001
Published in print: Aug 2001
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