GNSS Glossary

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O&M :

Operation & Maintenance

O/S :

Operating System

OCR :

Operational & Certification Requirement

OD :

Orbit Designation

OHA :

Operating Hazard Analysis

ORD :

Operations Requirements Document

ORR :

Operational Readiness Review

OS :

Open Service

OS :

Open Service

OSI :

Open Systems Interconnection

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