IGS Technical Report 2015

Yoomin Jean, Rolf Dach
Applications of the Global Navigation Satellite Systems (GNSS) to Earth Sciences are numerous. The International GNSS Service (IGS), a voluntary federation of government agencies, universities and research institutions, combines GNSS resources and expertise to provide the highest-quality GNSS data, products, and services in order to support high-precision applications for GNSS-related research and engineering activities. This IGS Technical Report 2015 includes contributions from the IGS
more » ... g Board, the Central Bureau, Analysis Centers, Data Centers, station and network operators, working groups, pilot projects, and others highlighting status and important activities, changes and results that took place and were achieved during 2015. This report is available in electronic version at ftp://igs.org/pub/resource/pubs/2015_techreport.pdf. The IGS wants to thank all contributing institutions operating network stations, Data Centers, or Analysis Centers for supporting the IGS. All contributions are welcome. They guarantee the success of the IGS also in future. The amount of IGS tracking data and products hosted by each of the four global Data Centers on permanently accessible servers increased from 2 TB to 11 TB (135 million files) over the last year, supported by significant additional storage capabilities provided by Regional Data Centers. Twelve Analysis Centers and a number of Associate Analysis Centers utilize tracking data from between 70 to more than 350 stations to generate precision products up to four times per day. Product Coordinators combine these products on a continuous basis and assure the quality of the products made available to the users. The collective effort of the IGS produces 700 IGS final, rapid, ultra-rapid and GLONASSonly product files, as well as 126 ionosphere files weekly. Furthermore, troposphere files for more than 300 stations are produced on a daily basis. A total of 640 million tracking data files (60 TB) and 110 million product files (15 TB) were downloaded in 2015 from the NASA Crustal Dynamics Data Information System (CDDIS), one of four IGS global Data Centers, by more than 10,000 unique hosts -demonstrating the intense interest of users in IGS data and products. The Central Bureau is operationally responsible for day-to-day management, interaction with station operators, and answering typically some 150-200 questions and requests from users per month. All these activities are performed year round, on a daily basis, with high redundancy and reliability -an impressive effort that is only made possible by the strong engagement of many individuals and the support of more than 240 institutions worldwide, in over 100 countries. The Central Bureau's (CB) mission is to provide a continuity of management and technology to sustain the IGS in perpetuity. It functions as the executive office of the service and is responsive to the IGS Governing Board in carrying out its directives and decisions. The CB coordinates the IGS tracking network and operates CB information system (CBIS), the principal information portal where the IGS web, ftp and mail services are hosted. The CB also represents the outward face of IGS to its diverse global user community. The CB office is hosted at
doi:10.7892/boris.80307 fatcat:cooofi56gvgzbe5ehfofr5kzqi