Data & Products

How to Submit Product Files

This page provides instructions for submitting product files to IVS Data Centers. Please follow the instructions for

If you follow these instructions then your files will be automatically placed into the appropriate directory on the Data Center.

First-time submitters should prepare their files in accordance with the formats and naming conventions described on this page. The IVS Analysis Coordinator must review and approve the first submission before a solution code can be registered.

File types.  Analysis product files that may be submitted to IVS Data Centers include the following list. Descriptions of each  product type are also found on the individual product pages

  • EOP-Intensive (EOPI)
  • EOP-Session (EOPS)
  • terrestrial reference frame (TRF)
  • celestial reference frame (CRF) 
  • troposphere parameters

In addition, each solution must have a solution description file.

File formats.  Formats for each type of product are as follows:

Formats for each type of product file are also found on the individual product pages

The format for the solution description file may be determined by the individual Analysis Center. The type of information that is requested to be included in the solution is outlined in a template:

  • Solution description: follow the template for information needed.

Name conventions.  The conventions for naming product files and related descriptions are shown in the table below. The file name serves to uniquely identify the type of product, the Analysis Center that produced it, and the solution used. These characteristics of the name are recognized and used by the script that processes incoming files to determine the Data Center directory into which the files will be placed.

IVS product file names:
file type name convention
--------- -----------------
EOP-I results aaaccccc.eopi
EOP-S results aaaccccc.eops
TRF results aaaccccc.trf
CRF results aaaccccc.crf  
Daily SINEX results aaaccccc.snx

IVS document file names:
file type name convention
--------- -----------------
EOP-I solution description aaaccccc.eopi.txt
EOP-S solution description aaaccccc.eops.txt
TRF solution description aaaccccc.trf.txt
CRF solution description aaaccccc.crf.txt
Daily SINEX solution descr. aaaccccc.dsnx.txt

Submission frequency.  Product files should be submitted on a regular schedule to keep the results up to date and timely for users. The nominal frequency is as follows:

  • The EOPI product file should be sumitted within 2 hours of the new data base being available from the correlator.
  • The EOPS product file should be submitted within 24 hours of the new data base being available from the correlator for EOPS products that are combined by the Analysis Coordinator into the official IVS product.  
  • The TRF product file should be sumitted on or about the first day of each quarter, i.e. January 1, April 1, July 1,October 1. In any case a new TRF solution should be submitted as soon as it is used as a new basis for the EOP submissions.
  • The CRF product file has no definite submission frequency since for EOP determination ICRF should bev used.
  • The troposphere parameter files are submitted to the Data Center and then combined. Submissions should be made within one month of data base availability.

Solution codes.   Each solution must have a code that appears in the Analysis Center codes file ac-codes.txt. Before submitting any new files, contact the Coordinating Center to register your solution code.

All submitted file names must include the solution code according to the file name conventions. Solution codes include the 3-character Analysis Center code plus a 5-character identifier.

First-time submitters of product files must have their solution files reviewed and approved by the Analysis Coordinator before a solution code can be registered by the Coordinating Center.

Submit.   Before submitting any new files, contact the Coordinating Center to register your solution code.

Files may be submitted to any of the three primary IVS Data Centers. All Data Centers mirror each other so that all the files are available from any Data Center within a few hours.

To submit a file, ftp to any of the machines listed below and put your file. The incoming area is monitored every 10 minutes by a script. When a new file is found, the script checks the file name against the name conventions and, if a match is found, the file is moved out of the incoming area and put into the appropriate directory.

You must follow the file name conventions or your file will not be recognized nor transferred from the incoming area. If you re-submit a file with the same name, the new file will overwrite the old one. Product files require a valid solution code, selected by the Analysis Center and entered in the control file ac-codes.txt.

Data Center Machine name Login Password
CDDIS «request Login and Password
from the CDDIS manager»
OPAR (Obs. Paris) anonymous
cd ivsincoming
your e-mail address
BKG Leipzig ivsincoming request from
Coordinating Center