♣ Real-Time PPP Service
JAXA conducts real-time precise point positioning (PPP) experiments using the L-band experimental(LEX) signal from "Michibiki(QZS-1)".
PPP is a technique to calculate accurate user positions using precise orbit and clock of GNSS without any reference stations.
Our Real-Time PPP Service allows to obtain a centimeter accuracy positioning.
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♣ What's MADOCA?
For this service, JAXA has developed Multi-GNSS orbit and clock estimator called "MADOCA (Multi-GNSS Advanced Demonstration tool for Orbit and Clock Analysis)".
This basic requirements are as follows;
(1) Multi-GNSS Support (GPS,GLONASS,Galileo and QZSS)
(2) Both of Offline and Real-Time Estimator
(3) Precise Estimation using latest models
(4) Reduction of Processing Time by Multi-threading
(5) Maintainability and Portability which can run on note PC
System: GPS, GLNASS and QZS (Gallileo and BeiDou are under construction..)
Goal: Real-Time positioning with less than 10cm accuracy
Goal of orbit/clock accuracy:
| Product | Offline | Real-Time |
| GPS | GLO | QZS | GPS | GLO | QZS |
| OBT | 3cm | 7cm | 6cm | 9cm |
| CLK | 0.1ns | 0.25ns | 0.1ns | 0.25ns |
Edit Date:2015/11/26
