Apex PPP GNSS Correction Services for Offshore Marine

Global, high-accuracy GNSS positioning designed to meet the requirements of all offshore positioning and navigation applications

The VERIPOS Apex correction services deliver global, high-accuracy GNSS positioning designed to meet the requirements of all offshore positioning and navigation applications.

Veripos

United Kingdom

Description

Apex uses Precise Point Positioning (PPP), an absolute positioning technique which corrects or models all GNSS error sources such as: satellite orbit and clocks, tropospheric, ionospheric and multipath errors. PPP isn’t dependent on the location of reference stations, so it’s able to provide position accuracy regardless of location.

VERIPOS operates its own Orbit and Clock Determination System (OCDS) which derives real-time corrections for all available satellite constellations using proprietary algorithms. The OCDS uses data from the VERIPOS reference station network. These stations are independent from the reference stations used by JPL for the Ultra services.

Apex services include three service levels: Apex, Apex² and Apex⁵. Each service offers the same accuracy level, but the robustness of each differs. Service levels that utilise more than one GNSS constellation will have more observable satellites which helps maintain accurate positioning when masking occurs or when suffering from ionospheric scintillation.

	Apex	Apex²	Apex⁵
GPS L1/L2	✔	✔	✔
GLONASS L1/L2		✔	✔
BeiDou B1/B2			✔
Galileo E1/E5b			✔
QZSS L1/L2			✔
Horizontal Accuracy	<5 cm	<5 cm	<4 cm
Vertical Accuracy	<12 cm	<12 cm	<9 cm
Reference Station Network	VERIPOS	VERIPOS	VERIPOS