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With reference data from the Swepos stations, you can calculate your GNSS observations in your own software.
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What is Rinex data?
You download rinex data yourself, in hourly or daily files, for post-calculation in your own software.
A rinex file contains observations of the code and carrier of the GNSS signals, from a Swepos station. Each data file contains either one-hour observations or one-day observations. Metadata at the beginning of rinex file contains information about bullets, GNSS antenna / receiver, approximate coordinates and measurement time.
Rinex data is included in the subscription to Post-Calculation.
Rinex daily files are available free of charge. Read more about Rinex data - daily files .
Rinex data is also freely available for research and teaching; special conditions apply. Contact Swepos Operations for more information.
How do I get data?
If you have a post-calculation subscription, you have access to Swepo's ftp server:
- ftp://ftp-sweposdata.lm.se/ (new window)
- sftp://ftp-sweposdata.lm.se/ (new window). Sftp uses an encrypted connection.
When logging in, enter your username and your password.
Only passive ftp is supported.
If you have a Windows computer, you can use FTP Transfer Explorer, for example. Another optional FTP client works well, but FTP transfer directly to your browser is not recommended.
FTP server content and structure
This is the file and directory structure of the ftp server:
| Datatyp | Catalog |
|---|---|
| Bandata | bandata/ |
| Day files, rinex 2 | rinex2/se_swepos_daily/yyyy/ddd/ |
| Timfiler, rinex 2 | rinex2/se_swepos_hourly/yyyy/ddd/ |
| Day files, rinex 3 | rinex3/se_swepos_daily/yyyy/ddd/ |
| Timfiler, rinex 3 | rinex3/se_swepos_hourly/yyyy/ddd/ |
Rines 3 files
The logging intervals are, for
- hourly files 1 second
- daily files 30 seconds.
nnnnxxccc_s_yyyydddhhmm_ppp_iii_tt.fff .gz
where the various parameters are described in the table below.
| Filename Parameter, rinex 3-format | Description |
|---|---|
| nnnnxxccc |
Station ID, where
|
| s |
Data source, where
|
| yyyydddhhmm | File start time (year, day of year, hour, minute) |
| ppp | File length |
| iii | Logging interval |
| tt |
Data type, where
|
| fff |
File type, where
|
Read more about rinex 3 at IGS website (new window, in English).
Rinex 2 files
Rinex 2 is an older version of the rinex standard, which does not support all GNSS signals currently available. Swepos continues to provide data in the rinex 2 format, alongside the rinex 3 format, but in the long run rinex 2 will be phased out.
The logging intervals are, for
- hour files 1 second
- daily files 15 seconds.
Compared to the rinex 3 files, the rinex 2 files have shorter names,
nnnndddp.yyt.zip
where the various parameters are described in the table below.
| File name parameter, rinex 2 format | Description |
|---|---|
| nnnn | Station designation. Translation to station name can be found in the coordinate list (see below). |
| ddd </td > | Day of the year |
| p |
Code for file length and start time, where
|
| yy | År |
| t |
File type, where
|
Information about the Swepos stations
When calculating with your own software, information on antenna type and eccentricities (antenna heights) is required for the Swepos stations.
In addition, accurate coordinates are needed for the stations. You can retrieve the coordinate list for a specific date via the Retrieve coordinate list e-service. the stations can be found in e-service Download coordinate list (new window).
Some stations have several receivers, which is why we have chosen to only report antenna type and not receiver type in the station information. Recipient type appears in the rinex files. Antenna type, coordinates and eccentricities are also present in the rinex files, but the information is more reliable in the station information file.
The file uses designations for the markings, as for some stations there is or has been more than one marking. Translation between marker designation, file name designation and station name can be found in the coordinate list.
The antennas of Swepos stations have a protective hood, so-called radom, which is referred to as "OSOD" or "OSOP" in the rinex files. If your calculation program does not recognize the radome designation, you can use "NONE" instead, as the influence of the OSOD and OSOP radomes is small.
Coordinates
You can retrieve the coordinate list for a specific date via e-service Download coordinate list (new window), and save as Excel or pdf file.
The coordinates are calculated with absolute antenna models. The station coordinates are checked continuously and, if necessary, updates are made, e.g. when replacing the antenna. When a station is new, or after an antenna change, preliminary coordinates are first calculated based on five-day measurements.
Twice a year, updates are made to these stations to so-called final coordinates. These are based on three weeks of data during spring or autumn. The time is chosen to minimize the effect of any seasonal variations and to avoid periods of snow on the antennas. Normally, the difference between preliminary and final coordinates is within 5 mm. Exceptions are if the preliminary coordinates are determined during a period of snow or if the station is not completely stable.
If you measured for a longer period, you are asked to take out a coordinate list at the beginning and end of the period. If the coordinates of a desired station differ between the beginning and the end of the period, it can e.g. due to an antenna replacement.