Table 2 List of variables from GNSSMeasurement class within the Android API package “location” (European GSA, 2018b)
From: GNSS smartphones positioning: advances, challenges, opportunities, and future perspectives
Field | Description |
|---|---|
ConstellationType | Constellation type (GPS: 1, SBAS: 2, GLONASS: 3, QZSS: 4, BDS: 5, Galileo: 6, Unknown: 9) |
Svid | Satellite ID (GPS: 1, SBAS: 2, GLONASS: 3, QZSS: 4, BDS: 5, Galileo: 6, Unknown: 9) |
TimeOffsetNanos | Time offset at which the measurement was taken in nanoseconds |
State | Current state of the GNSS engine |
ReceivedSvTimeNanos | Received GNSS satellite time at the measurement time |
ReceivedSvTimeUncertaintyNanos | 1-Sigma uncertainty of the Received GPS Time-of-Week in nanoseconds |
Cn0DbHz | Carrier-to-noise density in dB-HZ in the range [0,63] |
PseudorangeRatemetersperSecond | Gets the Pseudorange rate at the timestamp in m/s |
PseudorangeRateUncertaintyMetersPerSecond | 1-Sigma uncertainty of the pseudorange_rate_mps |
AccumulatedDeltaRangeState | Validity of the carrier measurements as follows ADR_STATE_CYCLE_SLIP:4 ADR_STATE_RESET: 2 ADR_STATE_VALID: 1 ADR_STATE_UNKNOWN: 0 Note: Only valid measurements should be used for calculation |
AccumulatedDeltaRangeMeters | Accumulated delta range since the last channel reset |
AccumulatedDeltaRangeUncertaintyMeters | 1-Sigma uncertainty of the accumulated delta range in meters |
CarrierFrequencyHz | Carrier frequency of each tracked signal in Hz |
CarrierCycles | Number of full carrier cycles between the satellite and the receiver (Deprecated in API level 28) |
CarrierPhase | RF phase detected by the receiver (Deprecated in API level 28) |
CarrierPhaseUncertainty | 1-Sigma uncertainty of carrier-phase (Deprecated in API level 28) |
MultipathIndicator | A value indicating the 'multipath' state of the event |
SnrInDb | Signal-to-noise ratio at correlator output in dB |
AgcDb | Automatic gain control (AGC) level |
BasebandCn0DbHz | Baseband carrier-to-noise density in dB-Hz (Added in API level 30) |
FullInterSignalBiasNanos | GNSS measurement's inter-signal bias in nanoseconds with sub-nanosecond accuracy (Added in API level 30) |
FullInterSignalBiasUncertaintyNanos | 1-Sigma uncertainty of GNSS measurement's inter-signal bias in nanoseconds (Added in API level 30) |
SatelliteInterSignalBiasNanos | GNSS measurement's satellite inter-signal bias in nanoseconds with sub-nanosecond accuracy (Added in API level 30) |
SatelliteInterSignalBiasUncertaintyNanos | 1-Sigma uncertainty of GNSS measurement's satellite inter-signal bias in nanoseconds (Added in API level 30) |
CodeType | GNSS measurement's code type (Added in API level 29) |