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🔄 UML Sequence Diagram: OSNMAParser in PIC2BIM iOS#

This sequence diagram outlines the flow of operations for parsing and validating OSNMA (Open Service Navigation Message Authentication) messages using the OSNMAParser component in the PIC2BIM iOS application.

🧩 UML Sequence Diagram#

AppGNSSReceiverOSNMAParserOSNMAValidatorMetadataHandlerAppAppGNSSReceiverGNSSReceiverOSNMAParserOSNMAParserOSNMAValidatorOSNMAValidatorMetadataHandlerMetadataHandlerStart GNSS SessionParse E1B MessageValidate SignatureValidation ResultValidated MessageAttach Location to PhotoUpdate UI/Report
AppGNSSReceiverOSNMAParserOSNMAValidatorMetadataHandlerAppAppGNSSReceiverGNSSReceiverOSNMAParserOSNMAParserOSNMAValidatorOSNMAValidatorMetadataHandlerMetadataHandlerStart GNSS SessionParse E1B MessageValidate SignatureValidation ResultValidated MessageAttach Location to PhotoUpdate UI/Report

✅ Summary#

  • The App initiates a GNSS session which leads to data capture by GNSSReceiver.
  • OSNMAParser extracts message content from Galileo E1B signals.
  • OSNMAValidator performs cryptographic checks to authenticate the messages.
  • Upon validation, metadata is generated and passed to the UI and reporting layers.