GNSS Glossary

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OS :

Open Service

OS :

Open Service

ORR :

Operational Readiness Review

OSI :

Open Systems Interconnection

ORD :

Operations Requirements Document

OHA :

Operating Hazard Analysis

OD :

Orbit Designation

OCR :

Operational & Certification Requirement

O/S :

Operating System

O&M :

Operation & Maintenance

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