On estimating gravity anomalies— A comparison of least squares collocation with conventional least squares techniques

A comparison of satellite systems for gravity field measurements

“…Tapley has shown ► hat Muth collocation models can be cast into a form in which standard least squares reduction procedures are applicable and that the solution so obtained is identical to the collocation solution. Argentiero and Lowrey (1977) have shown that the collocation algorithms are derivable from the well-known regression equations. From this vantage point they provide a second proof that the collocation algorithms are equivalent to standard least squares reduction procedures.…”