Correct data with updates

HD GNSS correction data consists of several different correction components. Different components are updated at different rates and also have different validity times.

Table 1 contains nominal update intervals and validity periods for each correctional data type. The nominal update interval refers to how often new data is transmitted from the server to subscribed users. The validity period refers to how long you can reliably use a single correction message, starting with epochTime indicated in message content.

Even though the update interval may be shorter than the validity period, meaning that, old data may still be valid even when new data is already available, you should start using new data as soon as it is received, as the accuracy of the old data degrades over time.

Table 1. Update intervals and validity periods of different correctional data types