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OS Net post-processed service

Some applications require GNSS data to be processed and a correction applied after the work has been carried out; that is, post-processed.

An application in this area could be a survey of a rail network, where a train has a GNSS receiver on it, logging the positions of the train as it moves along. These would be accurate to 10 meters unless the positions were improved. It would be very hard for the train’s receiver to continuously receive a GNSS correction as it moves along, so the data is collected in the receiver’s memory. This data can then be downloaded and combined with GPS data from one or more GNSS base stations, such as OS Net® to arrive at a better position.

The more GNSS data a user has per minute, the more measurements that can be made. The maximum OS Net GPS data (epoch) interval is once a second (1 Hz) and this is suitable for most kinematic uses (for example, in a plane, on a train, monitoring a structural deformation and so on).

The data could be stored in either manufacturer-specific or the industry-standard Receiver INdependent EXchange Format (RINEX).

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For general enquiries, complaints, feedback or suggestions, email: customerservices@ordnancesurvey.co.uk or call us on 08456 05 05 05