Ohio State University Department of Geodetic Science and Surveying

The adjustment and combination of GEOS-3 and SEASAT altimeter data by Chih-kuo Liang( Book )

1 edition published in 1983 in English and held by 13 WorldCat member libraries worldwide

A FORTRAN program for the computation of gravimetric quantities from high degree spherical harmonic expansions by Richard H Rapp( Book )

3 editions published in 1982 in English and held by 11 WorldCat member libraries worldwide

The computer program described in this report calculates the height anomaly, gravity anomaly, gravity disturbance, and the two components of the deflection of the vertical using fully normalized potential coefficients of a spherical harmonic expansion. The program is designed to calculate these quantities on a point to point basis although certain calculations are not repeated if the latitude of the point does not change. The point input consists of the geodetic latitude, longitude, and height above the reference ellipsoid. Expansions up to degree 180 have been tested with the program. The report first describes the theory to be implemented. The program is described with a set of results for five sample points computed with three different potential coefficient fields to degree 180. The computer time for a single point is 0.46 seconds per point on the Amdahl 470 V/8

Global positioning system exploitation by ODOT by Dean C Merchant( Book )

4 editions published in 1987 in English and held by 11 WorldCat member libraries worldwide

Disturbance vector in space from surface gravity anomalies using complementary models by Jaime Y Cruz( Book )

2 editions published in 1985 in English and held by 11 WorldCat member libraries worldwide

The modeling of the external disturbance vector of the earth from surface gravity anomaly data is discussed. The low frequency features of the signal are represented in spherical harmonic series. The recovery of the coefficients of the series from the given gravity anomalies is discussed focusing on the use of analytical continuation and ellipsoidal corrections to account for the earth's topography and ellipticity. The spectrum and data response of the spatial disturbance vector are studied to aid the design of models and experiments. The local models studied to complement the globally valid spherical harmonic model are the residual topographic model (RTM); the classical integral model; three versions of the Dirac approach to collocation; and two versions of the least squares collocation (l.s.c.) approach. Results indicate that the RTM itself should be used to model the high frequency signal variations whenever detailed (e.g., 1km x 1km) height data is available. The residual signal not already modeled by the RTM and spherical harmonic model can in most cases be accurately modeled by the integral model with mean topography accounted for. For high accuracies in mountainous areas, however, a collocation model should be used to account for the full variations of the topography, not just mean topography. Matrix conditioning problems with the 1.s.c. approach support preference to the Dirac systems for rigorous treatment of the topography at detailed (5' x 5') resolutions

Progress in the determination of the earth's gravity field : extended abstracts for the meeting held in Ft. Lauderdale, Florida, September 13-16, 1988.( Book )

1 edition published in 1989 in English and held by 9 WorldCat member libraries worldwide

The development of comprehensive error models and network adjustment techniques for inertial surveys by J Hannah( Book )

1 edition published in 1982 in English and held by 9 WorldCat member libraries worldwide

Present day inertial surveys are generally limited to single traverse runs in which few system error parameters are determined due to the lack of known control points along the traverse. Present methods of smoothing the filtered positional output from such traverses while satisfactory for many purposes are, with one exception, non-optimal in a statistical or least squares sense. Because of their reliance upon points with known positions along route, such smoothing methods are severely limited in the number of error parameters available to describe systematic error accumulation. Thus, there remains the presence of systematic trends after application of such error models. Further, these are restricted to positional information with little thought given to those for the anomalous gravity vector

The computation of detailed geoids using the fast Fourier transform method by Suisheng Zhao( Book )

1 edition published in 1989 in English and held by 8 WorldCat member libraries worldwide

Gravity field approximation using the predictors of Bjerhammar and Hardy by George J Priovolos( Book )

1 edition published in 1988 in English and held by 8 WorldCat member libraries worldwide

Both methods can use any linear functional of the disturbing potential as observation and/or quantity to be predicted. Both predictors were tested with the White Sands test data. Reference field and residual terrain model effects were removed from the observations and they were restored at the control stations after the predictions were performed

Inertial rapid geodetic survey system (rgss) error models and network adjustment by J Hannah( Book )

1 edition published in 1982 in English and held by 8 WorldCat member libraries worldwide

Continuous aircraft positioning using GPS aided by INS by Christopher Jekeli( Book )

3 editions published in 1998 in English and held by 8 WorldCat member libraries worldwide