Results 231 to 240 of about 32,348,343 (303)

Aircraft positioning using PPP method in GLONASS system

Aircraft Engineering and Aerospace Technology, 2018
Purpose The purpose of the study is focused on implementation of Global Navigation Satellite System (GLONASS) technique in civil aviation for recovery of aircraft position using Precise Point Positioning (PPP) method in kinematic mode. Design/methodology/approach The aircraft coordinates of Cessna 172 plane in XYZ geocentric frame were obtained ...
Kamil Krasuski   +2 more
openaire   +2 more sources

Graph theory and the PPP method

Journal of Mathematical Chemistry, 1991
A graph theoretical formulation of the PPP method is presented. A weighted adjacency matrix of the PPP graph is given, wherein the off-diagonal elements are the bond orders. The automorphism group of the PPP graph is defined and shown to be isomorphic with the permutational subgroup of the permutation-inversion group of the molecule. It is demonstrated
K. Balasubramanian
openaire   +2 more sources

Two colorful applications of the PPP method

International Journal of Quantum Chemistry, 1990
AbstractTwo different color‐related applications of the Pariser‐Parr‐Pople method are described. The first one deals with an explanation of the UV‐visible absorption spectrum of the curcumin pigment in turmeric and the color change of curcumin upon addition of OH−.
K. Balasubramanian
openaire   +2 more sources

Investigation of accuracy of PPP and PPP-AR methods for direct georeferencing in UAV photogrammetry

Earth Science Informatics, 2022
Traditionally, photogrammetric product accuracy at cm level is obtained with Ground Control Points (GCP) in UAV photogrammetry. In recent years, UAVs equipped with Post-Processing Kinematic & Real-Time Kinematic (PPK/RTK) have become widespread. Accuracy in cm-level can be obtained with relative/differential positioning with these equipment.
Öcalan, Taylan   +3 more
openaire   +4 more sources

Positioning performance of GNSS-PPP and PPP-AR methods for determining the vertical displacements

Survey Review, 2021
This study investigates the accuracy of vertical displacements monitored by Global Navigation Satellite Systems (GNSS) precise point positioning (PPP) with float-ambiguity solution and with ambiguity resolution (PPP-AR). For this purpose, a simulation was designed. The static GNSS observations were collected at a test point during different observation
openaire   +2 more sources

On the origins of the PPP method

International Journal of Quantum Chemistry, 1990
R. Pariser
openaire   +2 more sources

Home - About - Disclaimer - Privacy