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PositioNZ-PP RINEX file format

PositioNZ Post Processing Service (PositioNZ-PP) uses RINEX (receiver independent exchange format) files for input and output. The input file must be at least 60 minutes in length with accurate and complete metadata. Find out more about the RINEX data format.

RINEX data

The input and output files for PositioNZ-PP are RINEX (receiver independent exchange format) data files. PositioNZ-PP accepts both RINEX v2.11 and RINEX v3.0 for input. These can be produced using most GNSS (global navigation satellite system) post-processing software. All output files are RINEX v2.22.  

A separate RINEX file is required for each independent occupation at each mark. A valid GNSS observation length for PositioNZ-PP is between 1 and 48 hours. For best results use an observation longer than 4 hours. 

For more information see our page on expected accuracy: PositioNZ-PP and CSN Marks

PositioNZ-PP processes data at 30-second epochs. Files with smaller intervals (such as 1-second data from a RTK base station) will be converted to 30-second data. The maximum file size is 30mb.

The antenna height must be provided as a vertical measurement between the top of the survey mark and the antenna reference point (ARP). The ARP is almost always the lowest point/surface on the antenna. Note that the ARP must be set in the GNSS post-processing software used to create the RINEX file.

Antenna Reference Point (ARP)

RINEX files contain a header section with metadata that is used to process the data. When exporting GNSS data in RINEX format, the following information must be set correctly: 

RINEX labelDescription
Marker nameA unique name for the mark, such as a site’s geodetic code.
Antenna number or typeThe IGS standard antenna code. This is used with the antenna phase centre models to reduce the data to the ARP.  
Approx position XYZThe approximate XYZ position, accurate to a few metres, which is used as an initial coordinate for processing. For existing geodetic marks, this can be checked by converting the New Zealand Geodetic Datum 2000 (NZGD2000) coordinate in the Geodetic Database to International Terrestrial Reference Frame 20028 (ITRF2008(XYZ)). 
Antenna: delta H/E/N The vertical antenna height is used to reduce the data from the ARP to the top of the survey mark. 

PositioNZ-PP help

Refer to our help document for guidance on common issues encountered while using PositioNZ-PP:

PositioNZ-PP – GPS post-processing service help information
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If you are having problems, need some help or would like to send us feedback, email positionz@linz.govt.nz with ‘PositioNZ-PP feedback or issue’ in the subject line.