Abstract Coordinates in global reference frames are becoming more and common positioning whereas most of the geospatial data stored registries national frames. It is therefore essential to know relation between coordinates, i.e., transformation, as accurately possible. Officially provided pan-European transformations do not account for special conditions Nordic Baltic countries, namely crustal ...

Since 1994, the International GNSS Service (IGS) has provided precise GPS orbit products to the scientific community with increased precision and timeliness. Many national geodetic agencies and GPS users interested in geodetic positioning have adopted the IGS precise orbits to achieve centimeter level accuracy and ensure long-term reference frame stability. Relative positioning approaches that ...

Since 1994 the International GPS Service (IGS) has provided precise GPS orbit products to the scientific community with increased precision and timeliness. Many national geodetic agencies and GPS users interested in geodetic positioning have adopted the IGS precise orbits to achieve centimeter level accuracy and ensure long-term reference frame stability. Relative positioning approach that requ...

1.1. Let G be a semisimple complex Lie group with the Cartan datum (I, ·) and the root datum (Y,X, . . . ). Let H ⊂ B = B+,B− ⊂ G be a Cartan subgroup and a pair of opposite Borel subgroups respectively. Let X = G/B be the flag manifold of G. Let C = P ∋ ∞ be the projective line. Let α = ∑ i∈I aii ∈ N[I] ⊂ H2(X,Z). The moduli space of G-monopoles of topological charge α (see e.g. [4]) is natura...

Laser altimeters are commonly used in planetary research for their high geodetic accuracy. A key procedure processing of laser altimeter data is the geolocation. In this process, time-of-flight measurements converted to coordinates pulse footprints on surface target body. Here, we present a consistent and systematic formulation three geolocation models with increasing complexity: static model, ...

This paper describes a unique instantiation of the unscented Kalman filter (UKF) that is particularly well-suited to long-distance surface vessel tracking. The proposed leverages nonlinear process model predict position, speed, and heading targets directly in geodetic coordinates, obviating need for intermediate coordinate frame transformations, enabling use simple linear observer. These featur...

The non-availability of ellipsoidal heights local geodetic Datums has made it necessary for the application transformation models to available global obtain their respective theoretical in Datums. It is required know accuracy, as well reliability any model interest before its application. For that reason, this study comparatively analyses Molodensky and Kotsakis between geocentric non-geocentri...