Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Artificial Satellites : Journal of Planetary Geodesy

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: observations duration

Sortuj według:

Ogranicz wyniki do:

Variation of static-PPP positioning accuracy using GPS-single frequency observations (Aswan, Egypt)

Farah Ashraf

Artificial Satellites : Journal of Planetary Geodesy

2017

Vol. 52, No. 2

19--26

Precise Point Positioning (PPP) is a technique used for position computation with a high accuracy using only one GNSS receiver. It depends on highly accurate satellite position and clock data rather than broadcast ephemeries. PPP precision varies based on positioning technique (static or kinematic), observations type (single or dual frequency) and the duration of collected observations. PPP-(dual frequency receivers) offers comparable accuracy to differential GPS. PPP- single frequency receivers has many applications such as infrastructure, hydrography and precision agriculture. PPP using low cost GPS singlefrequency receivers is an area of great interest for millions of users in developing countries such as Egypt. This research presents a study for the variability of single frequency static GPS-PPP precision based on different observation durations.

Assessment study of Static-PPP convergence behaviour using GPS, GLONASS and mixed GPS/GLONASS observations

Farah A.

Artificial Satellites : Journal of Planetary Geodesy

2014

Vol. 49, No. 1

55--61

Precise Point Positioning (PPP) has been used for the last decade as a cost-effective alternative for the ordinary DGPS-Differential GPS with an estimated precision sufficient for many applications. PPP requires handling different types of errors using proper models. PPP precision varies with the use of observations from different satellite systems (GPS, GLONASS and mixed GPS/GLONASS) and the duration of observations. This research presents an evaluation study for the variability of Static-PPP precision based on different observation types (GPS, GLONASS and mixed observations) and observation duration. It can be concluded that Static-PPP solution using mixed observations is offering similar accuracy as the one using GPS-only observations and saving 15 minutes observation time. For 30 minutes of observation duration, mixed observations offers improvement percentages of 14%, 26% and 25% for latitude, longitude and height respectively.