Description of CORS Networks

Introduction

This folder includes the description of Continuously Operating Reference Stations networks in which Ashtech Office Software should search for compatible reference station raw data.

Each network is described through three XML files:

Users can define additional networks by providing the corresponding XML files, which can be easily edited using a simple text editor, or also a free XML editor such as Microsoft XML Notepad 2007.

Network.server.xml

The Network.server.xml file provides the general parameters of the network, such as name, URL and access type. The following syntax is used:

Syntax

<?xml version="1.0">
<WebRawDataServer>
   <Name>IGS</Name>
   <Comment>International GPS Service</Comment>
   <WebSiteLink>http://igscb.jpl.nasa.gov</WebSiteLink>
   <Protocol>Ftp</Protocol>
   <Host>cddis.gsfc.nasa.gov</Host>
   <Access>Public</Access>
   <Login> </Login>
   <Password> </Password>
</WebRawDataServer>

Description

<WebRawDataServer>

Network parameters

<Name>

Network name

<Comment>

Network description

<WebSiteLink>

Network web site for additional info (if any)

<Protocol>

Network protocol (Ftp, Http or File)

<Host>

Network access URL

<Access>

Network access type (Public or Restricted)

<Login>

Network access login (when access is restricted)

<Password>

Network access password (when access is restricted)

Network.services.xml

The Network.services.xml describes the services provided by the network, i.e. the raw data that can be downloaded, with a precise description of file location and format.

Syntax

<?xml version="1.0">
<ArrayOfWebRawDataService>
   <WebRawDataService>
      <Name>IGS Daily 30 second Raw Data</Name>
      <Comment>IGS worldwide stations raw-data - 24 h files - 30 s sampling</Comment>
      <Sampling>30000</Sampling>
      <SingleArchive>false</SingleArchive>
      <ObservationFile>
         <DataFormat>CRINEX</DataFormat>
         <TimeSpan>1440</TimeSpan>
         <FileName>[ssss][ddd]0.[yy]d</FileName>
         <FileCompression>TarZ</FileCompression>
         <RemotePath>/gps/data/daily/[yyyy]/[ddd]/[yy]d/[ssss][ddd]0.[yy]d.Z</RemotePath>
      </ObservationFile>
      <NavigationFile>
         <DataFormat>RINEX</DataFormat>
         <TimeSpan>1440</TimeSpan>
         <FileName>brdc[ddd]0.[yy]n</FileName>
         <FileCompression>TarZ</FileCompression>
         <RemotePath>/gps/data/daily/[yyyy]/[ddd]/[yy]n/brdc[ddd]0.[yy]n.Z</RemotePath>
      </NavigationFile>
   </WebRawDataService>
   <WebRawDataService>
      etc...
   </WebRawDataService>
</ArrayOfWebRawDataService>

Description

<ArrayOfWebRawDataService>

List of provided services

<WebRawDataService>

Service parameters

<Name>

Service name

<Comment>

Service description

<Sampling>

Data sampling (milliseconds)

<SingleArchive>

Set to true when Observation and Navigation files are stored in a single archive

<ObservationFile>

Observation file parameters

<NavigationFile>

Navigation file parameters

<DataFormat>

File format (RINEX or CRINEX)

<TimeSpan>

Recording duration (minutes)

<FileName>

File name. You may use the following patterns:

<FileCompression>

File compression type (Null, TarZ or GZip)

<RemotePath>

Folder name. You may use the following patterns:

Network.stations.xml

The Network.stations.xml describes the reference network stations with their names and positions.

Syntax

<?xml version="1.0">
<ArrayOfWebReferenceStation>
   <WebReferenceStation name="abpo">
      <Comment>Antananarivo, Madagascar</Comment>
      <HeightToARP>0.0083</HeightToARP>
      <X>4097216.65402516</X>
      <Y>4429119.03203516</Y>
      <Z>-2065771.34645032</Z>
      <ServerNames>IGS</ServerNames>
   </WebReferenceStation>
   <WebReferenceStation name="ade1">
      etc...
   </WebReferenceStation>
</ArrayOfWebReferenceStation>

Description

<ArrayOfWebReferenceStation>

List of available stations

<WebReferenceStation>

Station parameters with station name as attribute 'name'

<Comment>

Station description

<HeightToARP>

Height to Antenna Reference Point (meters)

<X>

X geocentric coordinate on reference datum (ITRF00 at current epoch assumed by default)

<Y>

Y geocentric coordinate on reference datum (ITRF00 at current epoch assumed by default)

<Z>

Y geocentric coordinate on reference datum (ITRF00 at current epoch assumed by default)

<ServerNames>

Comma-separated list of networks in which the station is referenced.