nya cggtts

Precise Positioning and Clock comparison

In this tutorial, we will work from the context of two stations: NYA100 and NYA200 both located in northern Norway.

We will use RINEXCLI to resolve the PVT solutions and visualize the location of both receivers.

We will then use RNX2CGGTTS to format the solutions of both clocks into two CGGTTS files.

Finally, we'll use CGGTTSCLI to compare both clocks.

Download the data

We'll start by downloading data from both stations and one SP3 for that day, from the CDDIS FTP.

At the time of this tutorial, we selected Day 254 of year 2023.
We'll work with only 24h of data, but this tutorial can be applied to more than 24 hours of data.

Input files (in our case):

• NYA100NOR_S_20232540000_01D_30S_MO.crx.gz
• NYA200NOR_R_20232540000_01D_30S_MO.crx.gz
• COD0OPSULT_2023251

## Quick analysis

Run rinex-cli -i on both files

rinex-cli -i \
    -f /tmp/NYA100NOR_S_20232540000_01D_30S_MO.crx.gz

rinex-cli -i \
    -f /tmp/NYA200NOR_R_20232540000_01D_30S_MO.crx.gz

From that we can deduce that both files use state of the art receivers and the sampling rate is steady. We

If you want a more thorough and exportable report, prefer --qc to -i.