GnssManager

```
@RequiresApi(value = 24) 
public final class GnssManager

                    
```
GNSS Manager
Main orchestrator for GNSS data collection and processing.
Responsibilities:
- Register Android GNSS callbacks
- Collect raw GNSS measurements, status, and navigation messages
- Parse navigation messages to extract ephemeris
- Calculate pseudoranges from raw measurements
- Calculate satellite positions from ephemeris
- Package all data for API transmission
Based on Google GPS Tools architecture and ICD-GPS-200 specification.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public class`	`GnssManager.Companion`

Constructor Summary

Constructors
Constructor	Description
`GnssManager(Context context, DataManager dataManager)`

Method Summary

Modifier and Type	Method	Description
`final Unit`	`startRecording(String sessionId, String deviceId)`	Start GNSS data recording.
`final Unit`	`startUpdates()`	Start GNSS updates (compatibility method for DataHolder).
`final Unit`	`stopRecording()`	Stop GNSS data recording and flush remaining data.
`final Unit`	`stopUpdates()`	Stop GNSS updates (compatibility method for DataHolder).
`final Unit`	`shutdown()`	Shutdown and cleanup.
`final Unit`	`applyConfig(GnssConfiguration config)`	Apply server-driven configuration.
`final List<GpsEphemerisProto>`	`getCurrentEphemerides()`	Get current ephemerides.
`final GpsEphemerisProto`	`getEphemerisForSatellite(Integer prn)`	Get ephemeris for a specific satellite.
`final Boolean`	`isRecording()`	Check if recording is active.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - GnssManager
```
GnssManager(Context context, DataManager dataManager)
```
- Method Detail
  - startRecording
```
 final Unit startRecording(String sessionId, String deviceId)
```
    Start GNSS data recording.
  - startUpdates
```
 final Unit startUpdates()
```
    Start GNSS updates (compatibility method for DataHolder).
  - stopRecording
```
 final Unit stopRecording()
```
    Stop GNSS data recording and flush remaining data.
  - stopUpdates
```
 final Unit stopUpdates()
```
    Stop GNSS updates (compatibility method for DataHolder).
  - shutdown
```
 final Unit shutdown()
```
    Shutdown and cleanup.
  - applyConfig
```
 final Unit applyConfig(GnssConfiguration config)
```
    Apply server-driven configuration. Updates buffer sizes immediately; re-registers Android callbacks if collection flags or measurement-rate settings changed while recording.
  - getCurrentEphemerides
```
 final List<GpsEphemerisProto> getCurrentEphemerides()
```
    Get current ephemerides.
  - getEphemerisForSatellite
```
 final GpsEphemerisProto getEphemerisForSatellite(Integer prn)
```
    Get ephemeris for a specific satellite.
  - isRecording
```
 final Boolean isRecording()
```
    Check if recording is active.