# eDGNSS subsystem callback interfaces Source: [https://docs.qualcomm.com/doc/80-PK177-134/topic/edgnss_callbacks.html](https://docs.qualcomm.com/doc/80-PK177-134/topic/edgnss_callbacks.html) - **[ILocationReportCallback](https://docs.qualcomm.com/doc/80-PK177-134/topic/ilocation_report_callback_edgnss.html)** Callback receives the location fields as parameters. - **[ILocationCapabilitiesCallback](https://docs.qualcomm.com/doc/80-PK177-134/topic/ilocation_capabilities_callback.html)** Callback receives the capabilities mask as a parameter. - **[ICorrectionStreamingControlCallback](https://docs.qualcomm.com/doc/80-PK177-134/topic/icorrection_streaming_control_callback.html)** Callback receives a request to start or stop correction data streaming to the precise positioning engine as a parameter. On receiving this callback, the application must start or stop the correction data injection per the argument value. **Parent Topic:** [eDGNSS](https://docs.qualcomm.com/doc/80-PK177-134/topic/edgnss.html) Last Published: Nov 14, 2024 [Previous Topic injectCorrectionData](https://docs.qualcomm.com/bundle/publicresource/80-PK177-134/topics/inject_correction_data.md) [Next Topic ILocationReportCallback](https://docs.qualcomm.com/bundle/publicresource/80-PK177-134/topics/ilocation_report_callback_edgnss.md)