# Presentation: 576929

## AUSPOS Online GPS Processing Service

**AUSPOS ****Online GPS Processing Service**

- John Manning , John Dawson.Ramesh Govind
- Geoscience Australia

## Australian Online GPS Processing Service (AUSPOS)

-  **Concepts**
**  ****International GPS Service (IGS)**
**  ****Australian Regional GPS Network (ARGN) **
**  ****long baseline precise GPS Processing**

## Background

** ****Geoscience Australia (GA) increasingly was undertaking GPS processing in the ‘national interest’ for :**
**- defense, government agencies, International**
**  ****obligations,...**
** ****International groups providing online GPS**
**  ****processing services :**
**- ITRF coordinates only**
**- potential for confusion in Australia, ie. GDA94  versus ITRF**
**  ****Internet based service logical extension**** ****to GA **
**   ****services**

##  Internet web application

-  **Internet web application**
** ****users submit geodetic quality GPS via web-**
**   ****browser**
** ****rapid turn-around precise positions via email**
** ****cm level coordinates anywhere in the World!**
** ****position quality depends on data quantity/quality**
** ****local datum within Australia (GDA94)**
** ****ITRF coordinates outside of Australia **
** ****FREE service**

## AUSPOS

- Produces GDA and ITRF positions as a free service
- Preserves National datum using tectonic plate model back to 1 January 1994
- Application is world wide

## Relative GPS Positioning

**Relative GPS Positioning**
**cm level positioning with two receivers**
**requires existing ground geodetic infrastructure**

## Absolute GPS Positioning

**Absolute GPS Positioning**
**cm level positioning with one receiver**
**geodetic infrastructure ‘invisible’ to the user**

## How it works

**How it works**
-  **International GPS Service (IGS)**
** ****worldwide network of permanent GPS receivers**
** ‘****baseline’ from three closest IGS GPS**
** ****station to station distances**
** ****typically <1000 km, up to 3500 km**

**IGS**

**IGS**

**IGS**

**User GPS**

## Australian Regional GPS Network (ARGN)

**Australian Regional GPS Network (ARGN)**

##  International GPS Service (IGS) Network

## }

**What do you Submit?**
-  **GPS data (RINEX)**
** ****Your email address**
** ****the height of your GPS antenna**
** ****the type of your GPS antenna**

- height

## Speed and accuracy

-  **6 hour data file**
** ****results delivered in ~ 3 minutes**
** ****20 mm horizontal, 50 mm vertical **
** ****24 hour data file**
** ****results delivered in ~15 minutes**
** ****<10 mm horizontal** and 10-20 mm vertical

## User

**User**
- GPS Data

**Processing Results**
**Coordinates (email**)

**http://www.ga.gov.au**

## AUSPOS Email

**AUSPOS Email**

## AUSPOS Report

**AUSPOS Report**

## Slide 16

## AUSPOS Australian Users 

## AUSPOS Global Users 

## AUSPOS Applications

**DGPS reference station positioning **
** ****Remote GPS station positioning **
** ****Ultra-long GPS baseline positioning **
** ****GPS connections to IGS and ARGN stations **
** ****High accuracy vertical GPS positioning **
** ****In the field high-accuracy processing **
** ****GPS network quality control**

## Internet References

**GA home page**
** ******** ****www.ga.gov.au**
**GA Geodesy home page**
** ******** ****www.auslig.gov.au/geodesy/newhome.htm**
**AUSPOS home page**
** ******** ****www.auslig.gov.au/geodesy/sgc/wwwgps**
**IGS home page**
** ******** ****igscb.jpl.nasa.gov**