Data Sources
This page lists places to obtain the inputs PPPx needs: GNSS observations, IGS precise products, and the table files.
GNSS observations
Section titled “GNSS observations”RINEX observation archives:
IGS products
Section titled “IGS products”Precise orbits, clocks, biases, and related products.
HTTP:
| Source | URL |
|---|---|
| CDDIS | https://cddis.nasa.gov/archive/gnss/ |
| CODE | http://ftp.aiub.unibe.ch/CODE_MGEX/CODE/ |
| ESA | http://navigation-office.esa.int/products/gnss-products/ |
| CNES | http://www.ppp-wizard.net/daily.html |
FTP:
| Source | URL |
|---|---|
| CDDIS | ftps://gdc.cddis.eosdis.nasa.gov/gnss/ |
| CODE | ftp://ftp.aiub.unibe.ch/CODE_MGEX/CODE/ |
| WHU | ftp://igs.gnsswhu.cn/pub/ |
| IGN | ftp://igs.ign.fr/pub/igs |
VMF1 tropospheric grid:
Table files
Section titled “Table files”Most table files ship with PPPx. Two are obtained externally:
Ocean tide loading (oceanload)
Section titled “Ocean tide loading (oceanload)”Use the Onsala loading service:
- Old portal: http://holt.oso.chalmers.se/loading/index-aside-2404271219.html
- New portal: https://barre.oso.chalmers.se/loading/l.php
Steps (old portal):
- Select the FES2004 ocean tide model.
- Leave the other options at their defaults.
- Enter your station list (XYZ or BLH).
- Enter your email and click Submit.
The coefficients are emailed to you; append them to your table/oceanload file.
Antenna models (igsatx)
Section titled “Antenna models (igsatx)”IGS ANTEX antenna models:
See Products & Tables for how each file is referenced from pppx.ini.