If we were to focus on the High Precision Positioning (HPP), the techniques (N)RTK, PPP-AR/PPP-RTK and PPP are brought into the spotlight. In (N)RTK, one single lump sum correction is transmitted in the observation domain where as with PPP-related approaches the corrections are transmitted in multiple components in the state space domain.

When utilizing GNSS measurements to calculate the receiver/user’s position, there are several different positioning techniques. These positioning techniques include SPS, DGNSS, SBAS, PPP, PPP-RTK/PPP-AR and (N)RTK. Each of the different positioning techniques offers different levels of position accuracy as described in the Figure 1.

The L band, as defined by the IEEE (Institute of Electrical and Electronics Engineers), is the 1 to 2 GHz range of the radio spectrum. The L band consists of two components, Aviation Radio Navigation Service (ARNS) and Radio Navigation Satellite Service (RNSS) and is utilized in many radar, satellite and terrestrial communications applications.

An eclipse is an event that occurs when an object is temporarily obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer.

With an exponentially growing GNSS market, it can quickly become overwhelming when trying to decide on the ideal receiver that would meet a client’s specifications. Because of this, I began collecting information on different GNSS receivers with the aim of developing a web utility that would allow the user to enter their specifications and the utility recommend suitable receivers.