Regional and local networks

Seatex offers complete reference, integrity and monitoring station packages for regional GPS infrastructure networks. Packages include all required equipment and software for a central control and monitoring center connected to reference stations via telecommunication lines. The network looks after all elements of DGPS data integrity and quality. .

The DRS 300 (Differential Reference Station) is a complete GPS reference station for permanent installation in national or regional GPS infrastructure systems.

The system combines a 12-channel, high-performance GPS receiver, a processor, communication ports and a data storage unit in a compact, 19-inch, rack mount package.The software includes an integrity-monitoring module for cost-effective local monitoring.

The DRS 300 is designed for integration into a Seatex GPS NetWorks-based control center and offers great flexibility for transmission of GPS corrections, data logging and user control via the keyboard and monitor provided.

Detailed information: [DRS 300]

The IMS 300 (Integrity Monitoring Station) is a complete GPS integrity monitoring station for permanent installation in national or regional GPS infrastructure systems.

The system incorporates high-performance hardware and software elements into a Seatex GPS NetWorks-based control center and provides flexibility for generating and transmitting statistical data files and offers easy user control.

The GPS NetWorks is the central component of a GPS reference station (e.g. DRS 300) and integrity monitoring station (e.g. IMS 300) network. Capable of monitoring and controlling a large number of GPS reference and monitor stations, GPS NetWorks offers great flexibility in communication methods, data storage, export of GPS data, network configuration, presentation via a graphical user interface, etc. Other features include the ability to generate correction signal services for IALA or FM-RDS and a key software module that handles warnings and error messages.

The Searef 100 and Searef 200 are portable GPS reference stations that transmit DGPS data via a radio link. Designed for the harsh environmental conditions of both polar and tropical regions, the Searef 100 and Searef 200 are natural partners to provide correction signals for the Seapath 200, DPS, DARPS and Seapos 100 products.

The Searef 100 contains a 12-channel, high-performance GPS receiver, a UHF or other radio transmitter and computer in a robust, waterproof package. The Searef 200 utilizes a dual frequency GPS receiver and is ideally suited for RTK operations. The Searef 100 and Searef 200 may be run on either batteries or AC power. The software allows hasinternal data logging. possibilities. The station may be configured remotely from a hand-held programmer or a linked PC.

The Searef product interfaces easily with the GPS NetWorks control center and may be used to augment a network of permanently installed stations (e.g. DRS 300 and IMS 300).

Europe's primary contribution to GNSS-1 (Global Navigation Satellite System) will involve signal relay transponders carried on geostationary satellites and a network of ground stations. Together, they are to provide a regional augmentation service for GPS and GLONASS signals over Europe, the Atlantic and Indian Oceans, South America, Africa, the Middle East and Central Asia. This augmentation is called an "overlay" and the European programme is known as the European Geostationary Navigation Overlay Service, or EGNOS.

During 1999 initial tests have been carried out on the EGNOS Test Bed, and Seatex was assigned the contract for delivery of the Reference Stations for this system. The EGNOS Test Bed is based on the SATREF system developed by Seatex for the Norwegian Network of GPS Reference Stations, and has enabled the EGNOS to get a "flying start" on the implementation of the Test Bed. This contract is one of several involvements for Seatex in the GNSS development and is important for the continued development of advanced, satellite based navigation and positioning products and systems.