Present and Future of China Satellite-Based Augmentation

System

China Satellite Navigation Office

February 2014

Contents

Present of China Satellite-Based Augmentation System

Future of China Satellite-Based Augmentation System

Present of China Satellite-Based Augmentation System

BeiDou Satellite Navigation System is designed integrating of the basic navigation system and the Satellite-Based Augmentation System, and it can provide basic navigation service as well as differential augmentation service. The service has been on line since Dec. 27th, 2012.

At the same time, experiments on the Satellite-Based Augmentation technology that provides service to GPS L1 C/A based on BeiDou GEO satellites have been implemented, and the results have demonstrated its feasibility.

Present of China Satellite-Based Augmentation System

System composition 3 GEO Satellites （ 80°E,

110°E, 140°E） 29 monitor stations

1 master control station

Present of China Satellite-Based Augmentation System B1 I of Signal in Space, Main content is as follows, detail is on ICD

Parameters Update rate Remarks

Augmentation health information

SatH2 3 s Satellite health flag for integrity and differential correction information

Satellite augmentation information

△t 18 s Equivalent clock  correction

UDREI 3 s User differential range error  index

RURA 18 s Regional user range accuracy index

Grid ionospheric augmentation information

△τ 6 min Vertical ionospheric delay at grid  point

GIVEI 6 min Grid ionospheric vertical  delay  error index

System accuracy: 3-5m; Other performance are beening tested

Contents

Present of China Satellite-Based Augmentation System

Future of China Satellite-Based Augmentation System

Future of China Satellite-Based Augmentation System AimsAims

Service area :China and surrounding areas

Support single frequency and multi-frequency users

Multi-system augmentation ability

Consider the possible of being compatible and

interoperable with EGNOS and WAAS

Provide CAT-I service

Future of China Satellite-Based Augmentation System Technology roadmap

Launch 3 GEO satellites ： 80°E,110°E,140°E Increase ground monitor stations: About 40 stations(China and

surrounding areas) Upgrade the algorithm of master control station : Provide dual

frequency, multi-system service Increase B1C(L1),B2a(L5) signal, being compatible and

interoperable with SBAS Broadcast augmentation information ： Broadcast ephemeris/clock

corrections, grid ionospheric correction and its corresponding integrity parameters. The format meets international standards.

Future of China Satellite-Based Augmentation System Development plan

2012

China Satellite-Based Augmentation System modernization (B1C,B2a)

2014 2016 2018 2020 2022 2024 2026 2028 2030

China Satellite-Based Augmentation System( B1I)

IOC

Thank You !