ECEF Position Accuracy and Reliability: Inertial Navigation with GNSS Precise Point Positioning (PPP) [PDF]
, 2020 This report presents experimental results for a moving platform using GPS PPP data for state estimation. Results from two PPP GPS state estimation approaches are presented: point-wise least squares (LS) and aided inertial navigation (INS). The point-wise
Farrell, Jay A. +2 more
core
Atmospheric Water Estimation Using GNSS Precise Point Positioning Method [PDF]
, 2018 The rapid adoption of the GNSS (Global Navigation Satellite System) technology in our modern daily life brings the opportunity to investigate its applicability to areas beyond positioning, navigation and timing, such as meteorology.
Andrei, Octavian +1 more
core +2 more sources
Effect of the 24 September 2011 solar radio burst on precise point positioning service [PDF]
, 2014 An intense solar radio burst occurred on 24 September 2011, which affected the tracking of Global Navigation Satellite Systems’ (GNSS) signals by receivers located in the sunlit hemisphere of the Earth.
Aquino, M. +3 more
core +2 more sources
Multi-Frequency Precise Point Positioning using GPS and Galileo data with smoothed ionospheric corrections [PDF]
, 2018 The poor signal visibility and continuity associated with urban environments together with the slow convergence/reconvergence time of Precise Point Positioning (PPP), usually makes PPP unsuitable for land navigation in cities.
Basile, Francesco +4 more
core +1 more source
Accuracy of a magnetic resonance imaging‐based 3D printed stereotactic brain biopsy device in dogs [PDF]
, 2020 Background: Brain biopsy of intracranial lesions is often necessary to determine specific therapy. The cost of the currently used stereotactic rigid frame and optical tracking systems for brain biopsy in dogs is often prohibitive or accuracy is not ...
Böttcher, Peter +8 more
core +1 more source
Kinematic Absolute Positioning with Quad-Constellation GNSS [PDF]
, 2019 The absolute positioning technique is based on a point positioning mode with a single Global Navigation Satellite System (GNSS) receiver, which has been widely used in many fields such as vehicle navigation and kinematic surveying.
Cai, Changsheng +3 more
core +2 more sources
A cryogenic rotation stage with a large clear aperture for the half-wave plates in the Spider instrument [PDF]
, 2015 We describe the cryogenic half-wave plate rotation mechanisms built for and used in Spider, a polarization-sensitive balloon-borne telescope array that observed the Cosmic Microwave Background at 95 GHz and 150 GHz during a stratospheric balloon flight ...
Alexandra S. Rahlin +51 more
core +3 more sources
Precise Point Positioning on the Reliable Detection of Tropospheric Model Errors [PDF]
Sensors, 2020 Precise point positioning (PPP) is one of the well-known applications of Global Navigation Satellite System (GNSS) and provides precise positioning solutions using accurate satellite orbit and clock products. The tropospheric delay due to the neutral atmosphere for microwave signals is one of the main sources of measurement error in PPP.
Hongyang Ma, Sandra Verhagen
openaire +6 more sources
Ionospheric Regional modeling Algorithm based on GNSS Precise Point Positioning [PDF]
, 2021 Precise point positioning (PPP) is an absolute spatial positioning technology different from carrier phase relative positioning. With the continuous development of Global navigation satellite system (GNSS), multi-constellation GNSS further provides PPP ...
Chen, Yan
core
The Impact of Eclipsing GNSS Satellites on the Precise Point Positioning [PDF]
Remote Sensing, 2018 When satellites enter into the noon maneuver or the shadow crossing regimes, the actual attitudes will depart from their nominal values. If improper attitude models are used, the induced-errors due to the wind-up effect and satellite antenna PCO (Phase Center Offset) will deteriorate the positioning accuracy. Because different generations of satellites
Xinyun Cao +4 more
openaire +3 more sources