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About
semisys is the Sensor Meta Information System of the German Research Centre for Geosciences.
Motivation
The precise analysis of GNSS observation data is based upon a variety of metadata from different sources, including station and satellite metadata. A high evaluation quality must be ensured by the consistency and integrity of this metadata.
The station and satellite metadata are currently maintained in ASCII based files that make the extraction of key information used for the data evaluation difficult. To get rid of the restrictions caused by the file based metadata management, the Operational Data Center (ODC) group of the GFZ developed a Sensor Meta Information System (semisys) for the central, format independent and validated storage of station and satellite metadata based upon client/server technology (PHP, jQuery) and an object-relational database (PostgreSQL).
Content
The following processing related metadata is currently stored in semisys:
- Station metadata extracted from IGS site logs (for different projects)
- Processed station coordinates (EPOS) and ocean loading values (calculated by Onsala Space Observatory)
- Hardware metadata (receiver, antenna, radome)
- Satellite parameter for GPS, GLONASS, Galileo, BeiDou, QZSS and SBAS
- Notice Advisories for GPS, GLONASS and Galileo (NANU, NAGU)
- ANTEX for GPS, GLONASS and Galileo
Site Notice
Editor
Markus Bradke
Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
Public Law Foundation
Telegrafenberg
14473 Potsdam
Tel.: +49 331 288 1182
www.gfz-potsdam.de
Authorized representatives:
The GFZ is legally represented by Prof. Dr. Niels Hovius (Chairman of the Board and Scientific Executive Director, interim) and Dr. Stefan Schwartze (Administrative Executive Director).
Turnover tax identification number according to § 27a UstG: DE138407750
Markus Bradke
Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
Public Law Foundation
Telegrafenberg
14473 Potsdam
Tel.: +49 331 288 1182
www.gfz-potsdam.de
Authorized representatives:
The GFZ is legally represented by Prof. Dr. Niels Hovius (Chairman of the Board and Scientific Executive Director, interim) and Dr. Stefan Schwartze (Administrative Executive Director).
Turnover tax identification number according to § 27a UstG: DE138407750
The Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences does not guarantee for the topicality, accuracy, completeness or quality of the provided material. Claims to liability against the Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences related to damages either material or non-material, through the use or non-use of the provided information or due to the use of incorrect or incomplete material are explicitly ruled out in so far that there is no evidence of intentional or gross negligence on the part of the Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences. All material provided is non-binding and without obligation. The Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences distinctly retains the right to modify, delete or publish parts of or the entire material provided at intervals or for good without prior notice.
In the case of direct or indirect referral to external pages ("links") which lie outside the field of responsibility of the Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences (www.gfz-potsdam.de), the Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences can only be made liable if it were aware of the illegal content of the respective page and if it were technically feasible and reasonable to prohibit viewing of the pages. The Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences explicitly declares that at the time of linking no illegal content was visible on the linked pages. The Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences has no influence on the up-dated and future design and content of the linked pages. Therefore, the Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences explicitly dissociates itself from any modified or altered content of the linked pages. This is valid for all links and referrals made to in the provided material as well as for external input to the guest book, discussion boards and mailing lists established by the GFZ . For illegal, faulty or incomplete contents and especially for damages through the use or non-use of the available information the provider of the page referred to is alone liable and not the supplier providing the link.
The Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences endeavours to observe the copyright of the used graphics, recordings, video sequences and texts in all of its publications. The proprietary rights for published copyrighted material remains in the possession of the copyright holder (Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences or a third party). A reproduction or use of these graphics, recordings, video sequences or texts in further electronic or printed publications is not permitted without the explicit consent of the copyright holder even if not labelled as a copyright protected document. All labels and trademarks, including those possibly copyrighted by a third party mentioned within the provided material are subject without exception to the conditions of the respectively valid trademarks and ownership rights of the respective registered owner. It cannot be concluded on the basis of the mere naming that trademarks are not protected by a third party.
If the opportunity for the input of personal or business data (email addresses, name, addresses) is given, the input of these data takes place voluntarily. The use and payment of all offered services are permitted - if and so far technically possible and reasonable - without specification of any personal data or under specification of anonymized data or an alias. The use of published postal addresses, telephone or fax numbers and email addresses for marketing purposes is prohibited, offenders sending unwanted spam messages will be punished.
The exclusion of liability is to be regarded as a part of the material provided from which reference to this page was made. In so far that parts or single phrases of this text do not or do not completely or no-longer correspond to the current legal position the remaining parts of the documents remain unaffected in their content and validity.
The Developer
M.Eng. Markus Bradke
bradke@gfz-potsdam.de
P: (+49) 331 288 1182 Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences
Section 1.1 : GPS/Galileo Earth Observation
Telegrafenberg
DE - 14473 Potsdam
bradke@gfz-potsdam.de
P: (+49) 331 288 1182 Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences
Section 1.1 : GPS/Galileo Earth Observation
Telegrafenberg
DE - 14473 Potsdam