Added in API level 24

GnssMeasurement


class GnssMeasurement : Parcelable
kotlin.Any
   ↳ android.location.GnssMeasurement

A class representing a GNSS satellite measurement, containing raw and computed information.

Summary

Constants
static Int

The state of the getAccumulatedDeltaRangeMeters() has a cycle slip detected.

static Int

Reports whether the flag ADR_STATE_HALF_CYCLE_RESOLVED has been reported by the GNSS hardware.

static Int

Reports whether the value getAccumulatedDeltaRangeMeters() has resolved the half cycle ambiguity.

static Int

The state of the getAccumulatedDeltaRangeMeters() has detected a reset.

static Int

The state of the value getAccumulatedDeltaRangeMeters() is invalid or unknown.

static Int

The state of the getAccumulatedDeltaRangeMeters() is valid.

static Int

The measurement shows signs of multi-path.

static Int

The measurement shows no signs of multi-path.

static Int

The indicator is not available or the presence or absence of multipath is unknown.

static Int

This GNSS measurement's tracking state has secondary code lock.

static Int

This Beidou measurement's tracking state has D2 bit sync.

static Int

This Beidou measurement's tracking state has D2 sub-frame sync.

static Int

This GNSS measurement's tracking state has bit sync.

static Int

This GNSS measurement's tracking state has code lock.

static Int

This Galileo measurement's tracking state has E1B/C code lock.

static Int

This Galileo measurement's tracking state has E1B page sync.

static Int

This Galileo measurement's tracking state has E1C secondary code lock.

static Int

This Glonass measurement's tracking state has string sync.

static Int

This Glonass measurement's tracking state has time-of-day decoded.

static Int

This Glonass measurement's tracking state has time-of-day known, possibly not decoded over the air but has been determined from other sources.

static Int

This GNSS measurement's tracking state contains millisecond ambiguity.

static Int

This SBAS measurement's tracking state has whole second level sync.

static Int

This GNSS measurement's tracking state has sub-frame sync.

static Int

This GNSS measurement's tracking state has symbol sync.

static Int

This GNSS measurement's tracking state has time-of-week decoded.

static Int

This GNSS measurement's tracking state has time-of-week known, possibly not decoded over the air but has been determined from other sources.

static Int

This GNSS measurement's tracking state is invalid or unknown.

Inherited constants
Public methods
Int

Double

Gets the accumulated delta range since the last channel reset, in meters.

Int

Gets 'Accumulated Delta Range' state.

Double

Gets the accumulated delta range's uncertainty (1-Sigma) in meters.

Double

Gets the Automatic Gain Control level in dB.

Double

Gets the baseband carrier-to-noise density in dB-Hz.

Long

The number of full carrier cycles between the satellite and the receiver.

Float

Gets the carrier frequency of the tracked signal.

Double

Gets the RF phase detected by the receiver.

Double

Gets the carrier-phase's uncertainty (1-Sigma).

Double

Gets the Carrier-to-noise density in dB-Hz.

String

Gets the GNSS measurement's code type.

Int

Gets the constellation type.

Double

Gets the GNSS measurement's inter-signal bias in nanoseconds with sub-nanosecond accuracy.

Double

Gets the GNSS measurement's inter-signal bias uncertainty (1 sigma) in nanoseconds with sub-nanosecond accuracy.

Int

Gets a value indicating the 'multipath' state of the event.

Double

Gets the Pseudorange rate at the timestamp in m/s.

Double

Gets the pseudorange's rate uncertainty (1-Sigma) in m/s.

Long

Gets the received GNSS satellite time, at the measurement time, in nanoseconds.

Long

Gets the error estimate (1-sigma) for the received GNSS time, in nanoseconds.

Double

Gets the GNSS measurement's satellite inter-signal bias in nanoseconds with sub-nanosecond accuracy.

Double

Gets the GNSS measurement's satellite inter-signal bias uncertainty (1 sigma) in nanoseconds with sub-nanosecond accuracy.

Double

Gets the (post-correlation & integration) Signal-to-Noise ratio (SNR) in dB.

Int

Gets per-satellite-signal sync state.

Int

Gets the satellite ID.

Double

Gets the time offset at which the measurement was taken in nanoseconds.

Boolean

Returns true if getAutomaticGainControlLevelDb() is available, false otherwise.

Boolean

Returns true if getBasebandCn0DbHz() is available, false otherwise.

Boolean

Returns true if getCarrierCycles() is available, false otherwise.

Boolean

Returns true if getCarrierFrequencyHz() is available, false otherwise.

Boolean

Returns true if getCarrierPhase() is available, false otherwise.

Boolean

Returns true if getCarrierPhaseUncertainty() is available, false otherwise.

Boolean

Returns true if getCodeType() is available, false otherwise.

Boolean

Returns true if getFullInterSignalBiasNanos() is available, false otherwise.

Boolean

Returns true if getFullInterSignalBiasUncertaintyNanos() is available, false otherwise.

Boolean

Returns true if getSatelliteInterSignalBiasNanos() is available, false otherwise.

Boolean

Returns true if getSatelliteInterSignalBiasUncertaintyNanos() is available, false otherwise.

Boolean

Returns true if getSnrInDb() is available, false otherwise.

String

Unit
writeToParcel(parcel: Parcel, flags: Int)

Properties
static Parcelable.Creator<GnssMeasurement!>

Constants

ADR_STATE_CYCLE_SLIP

Added in API level 24
static val ADR_STATE_CYCLE_SLIP: Int

The state of the getAccumulatedDeltaRangeMeters() has a cycle slip detected.

Value: 4

ADR_STATE_HALF_CYCLE_REPORTED

Added in API level 28
static val ADR_STATE_HALF_CYCLE_REPORTED: Int

Reports whether the flag ADR_STATE_HALF_CYCLE_RESOLVED has been reported by the GNSS hardware.

When this bit is set, the value of getAccumulatedDeltaRangeUncertaintyMeters() can be low (centimeter level) whether or not the half cycle ambiguity is resolved.

When this bit is unset, the value of getAccumulatedDeltaRangeUncertaintyMeters() is larger, to cover the potential error due to half cycle ambiguity being unresolved.

Value: 16

ADR_STATE_HALF_CYCLE_RESOLVED

Added in API level 28
static val ADR_STATE_HALF_CYCLE_RESOLVED: Int

Reports whether the value getAccumulatedDeltaRangeMeters() has resolved the half cycle ambiguity.

When this bit is set, the getAccumulatedDeltaRangeMeters() corresponds to the carrier phase measurement plus an accumulated integer number of carrier full cycles.

When this bit is unset, the getAccumulatedDeltaRangeMeters() corresponds to the carrier phase measurement plus an accumulated integer number of carrier half cycles.

For signals that have databits, the carrier phase tracking loops typically use a costas loop discriminator. This type of tracking loop introduces a half-cycle ambiguity that is resolved by searching through the received data for known patterns of databits (e.g. GPS uses the TLM word) which then determines the polarity of the incoming data and resolves the half-cycle ambiguity.

Before the half-cycle ambiguity has been resolved it is possible that the ADR_STATE_VALID flag is set:

  • In cases where ADR_STATE_HALF_CYCLE_REPORTED is not set, the ADR_STATE_HALF_CYCLE_RESOLVED flag will not be available. Here, a half wave length will be added to the returned accumulated delta range uncertainty to indicate the half cycle ambiguity.
  • In cases where ADR_STATE_HALF_CYCLE_REPORTED is set, half cycle ambiguity will be indicated via both the ADR_STATE_HALF_CYCLE_RESOLVED flag and as well a half wave length added to the returned accumulated delta range uncertainty.
Value: 8

ADR_STATE_RESET

Added in API level 24
static val ADR_STATE_RESET: Int

The state of the getAccumulatedDeltaRangeMeters() has detected a reset.

Value: 2

ADR_STATE_UNKNOWN

Added in API level 24
static val ADR_STATE_UNKNOWN: Int

The state of the value getAccumulatedDeltaRangeMeters() is invalid or unknown.

Value: 0

ADR_STATE_VALID

Added in API level 24
static val ADR_STATE_VALID: Int

The state of the getAccumulatedDeltaRangeMeters() is valid.

Value: 1

MULTIPATH_INDICATOR_DETECTED

Added in API level 24
static val MULTIPATH_INDICATOR_DETECTED: Int

The measurement shows signs of multi-path.

Value: 1

MULTIPATH_INDICATOR_NOT_DETECTED

Added in API level 24
static val MULTIPATH_INDICATOR_NOT_DETECTED: Int

The measurement shows no signs of multi-path.

Value: 2

MULTIPATH_INDICATOR_UNKNOWN

Added in API level 24
static val MULTIPATH_INDICATOR_UNKNOWN: Int

The indicator is not available or the presence or absence of multipath is unknown.

Value: 0

STATE_2ND_CODE_LOCK

Added in API level 29
static val STATE_2ND_CODE_LOCK: Int

This GNSS measurement's tracking state has secondary code lock.

Value: 65536

STATE_BDS_D2_BIT_SYNC

Added in API level 24
static val STATE_BDS_D2_BIT_SYNC: Int

This Beidou measurement's tracking state has D2 bit sync.

Value: 256

STATE_BDS_D2_SUBFRAME_SYNC

Added in API level 24
static val STATE_BDS_D2_SUBFRAME_SYNC: Int

This Beidou measurement's tracking state has D2 sub-frame sync.

Value: 512

STATE_BIT_SYNC

Added in API level 24
static val STATE_BIT_SYNC: Int

This GNSS measurement's tracking state has bit sync.

Value: 2

STATE_CODE_LOCK

Added in API level 24
static val STATE_CODE_LOCK: Int

This GNSS measurement's tracking state has code lock.

Value: 1

STATE_GAL_E1BC_CODE_LOCK

Added in API level 24
static val STATE_GAL_E1BC_CODE_LOCK: Int

This Galileo measurement's tracking state has E1B/C code lock.

Value: 1024

STATE_GAL_E1B_PAGE_SYNC

Added in API level 24
static val STATE_GAL_E1B_PAGE_SYNC: Int

This Galileo measurement's tracking state has E1B page sync.

Value: 4096

STATE_GAL_E1C_2ND_CODE_LOCK

Added in API level 24
static val STATE_GAL_E1C_2ND_CODE_LOCK: Int

This Galileo measurement's tracking state has E1C secondary code lock.

Value: 2048

STATE_GLO_STRING_SYNC

Added in API level 24
static val STATE_GLO_STRING_SYNC: Int

This Glonass measurement's tracking state has string sync.

Value: 64

STATE_GLO_TOD_DECODED

Added in API level 24
static val STATE_GLO_TOD_DECODED: Int

This Glonass measurement's tracking state has time-of-day decoded.

Value: 128

STATE_GLO_TOD_KNOWN

Added in API level 26
static val STATE_GLO_TOD_KNOWN: Int

This Glonass measurement's tracking state has time-of-day known, possibly not decoded over the air but has been determined from other sources. If TOD decoded is set then TOD Known will also be set.

Value: 32768

STATE_MSEC_AMBIGUOUS

Added in API level 24
static val STATE_MSEC_AMBIGUOUS: Int

This GNSS measurement's tracking state contains millisecond ambiguity.

Value: 16

STATE_SBAS_SYNC

Added in API level 24
static val STATE_SBAS_SYNC: Int

This SBAS measurement's tracking state has whole second level sync.

Value: 8192

STATE_SUBFRAME_SYNC

Added in API level 24
static val STATE_SUBFRAME_SYNC: Int

This GNSS measurement's tracking state has sub-frame sync.

Value: 4

STATE_SYMBOL_SYNC

Added in API level 24
static val STATE_SYMBOL_SYNC: Int

This GNSS measurement's tracking state has symbol sync.

Value: 32

STATE_TOW_DECODED

Added in API level 24
static val STATE_TOW_DECODED: Int

This GNSS measurement's tracking state has time-of-week decoded.

Value: 8

STATE_TOW_KNOWN

Added in API level 26
static val STATE_TOW_KNOWN: Int

This GNSS measurement's tracking state has time-of-week known, possibly not decoded over the air but has been determined from other sources. If TOW decoded is set then TOW Known will also be set.

Value: 16384

STATE_UNKNOWN

Added in API level 24
static val STATE_UNKNOWN: Int

This GNSS measurement's tracking state is invalid or unknown.

Value: 0

Public methods

describeContents

Added in API level 24
fun describeContents(): Int
Return
Int a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either 0 or android.os.Parcelable#CONTENTS_FILE_DESCRIPTOR

getAccumulatedDeltaRangeMeters

Added in API level 24
fun getAccumulatedDeltaRangeMeters(): Double

Gets the accumulated delta range since the last channel reset, in meters.

The error estimate for this value is getAccumulatedDeltaRangeUncertaintyMeters().

The availability of the value is represented by getAccumulatedDeltaRangeState().

A positive value indicates that the SV is moving away from the receiver. The sign of getAccumulatedDeltaRangeMeters() and its relation to the sign of getCarrierPhase() is given by the equation:

accumulated delta range = -k * carrier phase    (where k is a constant)

Similar to the concept of an RTCM "Phaserange", when the accumulated delta range is initially chosen, and whenever it is reset, it will retain the integer nature of the relative carrier phase offset between satellites observed by this receiver, such that the double difference of this value between receivers and satellites may be used, together with integer ambiguity resolution, to determine highly precise relative location between receivers.

The alignment of the phase measurement will not be adjusted by the receiver so the in-phase and quadrature phase components will have a quarter cycle offset as they do when transmitted from the satellites. If the measurement is from a combination of the in-phase and quadrature phase components, then the alignment of the phase measurement will be aligned to the in-phase component.

getAccumulatedDeltaRangeState

Added in API level 24
fun getAccumulatedDeltaRangeState(): Int

Gets 'Accumulated Delta Range' state.

This indicates the state of the getAccumulatedDeltaRangeMeters() measurement. See the table below for a detailed interpretation of each state.

ADR_STATE Time of relevance Interpretation
UNKNOWN ADR(t) No valid carrier phase information is available at time t.
VALID ADR(t) Valid carrier phase information is available at time t. This indicates that this measurement can be used as a reference for future measurements. However, to compare it to previous measurements to compute delta range, other bits should be checked. Specifically, it can be used for delta range computation if it is valid and has no reset or cycle slip at this epoch i.e. if VALID_BIT == 1 && CYCLE_SLIP_BIT == 0 && RESET_BIT == 0.
RESET ADR(t) - ADR(t-1) Carrier phase accumulation has been restarted between current time t and previous time t-1. This indicates that this measurement can be used as a reference for future measurements, but it should not be compared to previous measurements to compute delta range.
CYCLE_SLIP ADR(t) - ADR(t-1) Cycle slip(s) have been detected between the current time t and previous time t-1. This indicates that this measurement can be used as a reference for future measurements. Clients can use a measurement with a cycle slip to compute delta range against previous measurements at their own risk.
HALF_CYCLE_RESOLVED ADR(t) Half cycle ambiguity is resolved at time t.
HALF_CYCLE_REPORTED ADR(t) Half cycle ambiguity is reported at time t.
Return
Int Value is either 0 or a combination of android.location.GnssMeasurement#ADR_STATE_UNKNOWN, android.location.GnssMeasurement#ADR_STATE_VALID, android.location.GnssMeasurement#ADR_STATE_RESET, android.location.GnssMeasurement#ADR_STATE_CYCLE_SLIP, android.location.GnssMeasurement#ADR_STATE_HALF_CYCLE_RESOLVED, and android.location.GnssMeasurement#ADR_STATE_HALF_CYCLE_REPORTED

getAccumulatedDeltaRangeUncertaintyMeters

Added in API level 24
fun getAccumulatedDeltaRangeUncertaintyMeters(): Double

Gets the accumulated delta range's uncertainty (1-Sigma) in meters.

The uncertainty is represented as an absolute (single sided) value.

The status of the value is represented by getAccumulatedDeltaRangeState().

getAutomaticGainControlLevelDb

Added in API level 26
Deprecated in API level 33
fun getAutomaticGainControlLevelDb(): Double

Deprecated: Use GnssMeasurementsEvent#getGnssAutomaticGainControls() instead.

Gets the Automatic Gain Control level in dB.

AGC acts as a variable gain amplifier adjusting the power of the incoming signal. The AGC level may be used to indicate potential interference. Higher gain (and/or lower input power) shall be output as a positive number. Hence in cases of strong jamming, in the band of this signal, this value will go more negative. This value must be consistent given the same level of the incoming signal power.

Note: Different hardware designs (e.g. antenna, pre-amplification, or other RF HW components) may also affect the typical output of of this value on any given hardware design in an open sky test - the important aspect of this output is that changes in this value are indicative of changes on input signal power in the frequency band for this measurement.

The value is only available if hasAutomaticGainControlLevelDb() is true

getBasebandCn0DbHz

Added in API level 30
fun getBasebandCn0DbHz(): Double

Gets the baseband carrier-to-noise density in dB-Hz.

Typical range: 10-50 dB-Hz. The range of possible baseband C/N0 values is 0-63 dB-Hz to handle some edge cases.

The value contains the measured C/N0 for the signal at the baseband. This is typically a few dB weaker than the value estimated for C/N0 at the antenna port, which is reported in getCn0DbHz().

Return
Double Value is between 0 and 63 inclusive

getCarrierCycles

Added in API level 24
Deprecated in API level 28
fun getCarrierCycles(): Long

Deprecated: use getAccumulatedDeltaRangeMeters() instead.

The number of full carrier cycles between the satellite and the receiver.

The reference frequency is given by the value of getCarrierFrequencyHz().

The value is only available if hasCarrierCycles() is true.

getCarrierFrequencyHz

Added in API level 24
fun getCarrierFrequencyHz(): Float

Gets the carrier frequency of the tracked signal.

For example it can be the GPS central frequency for L1 = 1575.45 MHz, or L2 = 1227.60 MHz, L5 = 1176.45 MHz, varying GLO channels, etc.

The value is only available if hasCarrierFrequencyHz() is true.

Return
Float the carrier frequency of the signal tracked in Hz.

getCarrierPhase

Added in API level 24
Deprecated in API level 28
fun getCarrierPhase(): Double

Deprecated: use getAccumulatedDeltaRangeMeters() instead.

Gets the RF phase detected by the receiver.

Range: [0.0, 1.0].

This is the fractional part of the complete carrier phase measurement.

The reference frequency is given by the value of getCarrierFrequencyHz().

The error estimate for this value is getCarrierPhaseUncertainty().

The value is only available if hasCarrierPhase() is true.

getCarrierPhaseUncertainty

Added in API level 24
Deprecated in API level 28
fun getCarrierPhaseUncertainty(): Double

Deprecated: use getAccumulatedDeltaRangeUncertaintyMeters() instead.

Gets the carrier-phase's uncertainty (1-Sigma).

The uncertainty is represented as an absolute (single sided) value.

The value is only available if hasCarrierPhaseUncertainty() is true.

getCn0DbHz

Added in API level 24
fun getCn0DbHz(): Double

Gets the Carrier-to-noise density in dB-Hz.

Typical range: 10-50 dB-Hz. The range of possible C/N0 values is 0-63 dB-Hz to handle some edge cases.

The value contains the measured C/N0 for the signal at the antenna input.

Return
Double Value is between 0 and 63 inclusive

getCodeType

Added in API level 29
fun getCodeType(): String

Gets the GNSS measurement's code type.

Similar to the Attribute field described in RINEX 4.00, e.g., in Tables 9-16 (see https://igs.org/wg/rinex/#documents-formats).

Returns "A" for GALILEO E1A, GALILEO E6A, NavIC L5A SPS, NavIC SA SPS, GLONASS G1a L1OCd, GLONASS G2a L2CSI.

Returns "B" for GALILEO E1B, GALILEO E6B, NavIC L5B RS (D), NavIC SB RS (D), GLONASS G1a L1OCp, GLONASS G2a L2OCp, QZSS L1Sb.

Returns "C" for GPS L1 C/A, GPS L2 C/A, GLONASS G1 C/A, GLONASS G2 C/A, GALILEO E1C, GALILEO E6C, SBAS L1 C/A, QZSS L1 C/A, NavIC L5C RS (P), NavIC SC RS (P).

Returns "D" for GPS L2 (L1(C/A) + (P2-P1) (semi-codeless)), QZSS L5S(I), BDS B1C Data, BDS B2a Data, BDS B2b Data, BDS B2 (B2a+B2b) Data, BDS B3a Data, NavIC L1 Data.

Returns “E” for QZSS L1 C/B, QZSS L6E.

Returns "I" for GPS L5 I, GLONASS G3 I, GALILEO E5a I, GALILEO E5b I, GALILEO E5a+b I, SBAS L5 I, QZSS L5 I, BDS B1 I, BDS B2 I, BDS B3 I.

Returns "L" for GPS L1C (P), GPS L2C (L), QZSS L1C (P), QZSS L2C (L), QZSS L6P, BDS B1a Pilot.

Returns "M" for GPS L1M, GPS L2M.

Returns "N" for GPS L1 codeless, GPS L2 codeless.

Returns "P" for GPS L1P, GPS L2P, GLONASS G1P, GLONASS G2P, BDS B1C Pilot, BDS B2a Pilot, BDS B2b Pilot, BDS B2 (B2a+B2b) Pilot, BDS B3a Pilot, QZSS L5S(Q), NavIC L1 Pilot.

Returns "Q" for GPS L5 Q, GLONASS G3 Q, GALILEO E5a Q, GALILEO E5b Q, GALILEO E5a+b Q, SBAS L5 Q, QZSS L5 Q, BDS B1 Q, BDS B2 Q, BDS B3 Q.

Returns "S" for GPS L1C (D), GPS L2C (M), QZSS L1C (D), QZSS L2C (M), QZSS L6D, BDS B1a Data.

Returns "W" for GPS L1 Z-tracking, GPS L2 Z-tracking.

Returns "X" for GPS L1C (D+P), GPS L2C (M+L), GPS L5 (I+Q), GLONASS G1a L1OCd+L1OCp, GLONASS G2a L2CSI+L2OCp, GLONASS G3 (I+Q), GALILEO E1 (B+C), GALILEO E5a (I+Q), GALILEO E5b (I+Q), GALILEO E5a+b (I+Q), GALILEO E6 (B+C), SBAS L5 (I+Q), QZSS L1C (D+P), QZSS L2C (M+L), QZSS L5 (I+Q), QZSS L6 (D+P), BDS B1 (I+Q), BDS B1C Data+Pilot, BDS B2a Data+Pilot, BDS B2 (I+Q), BDS B2 (B2a+B2b) Data+Pilot, BDS B3 (I+Q), NavIC L5 (B+C), NavIC S (B+C), NavIC L1 Data+Pilot.

Returns "Y" for GPS L1Y, GPS L2Y.

Returns "Z" for GALILEO E1 (A+B+C), GALILEO E6 (A+B+C), QZSS L1S/L1-SAIF, QZSS L5S (I+Q), QZSS L6(D+E), BDS B1A Data+Pilot, BDS B2b Data+Pilot, BDS B3a Data+Pilot.

Returns "UNKNOWN" if the GNSS Measurement's code type is unknown.

The code type is used to specify the observation descriptor defined in GNSS Observation Data File Header Section Description in the RINEX standard (Version 4.00). In cases where the code type does not align with the above listed values, the code type from the most recent version of RINEX should be used. For example, if a code type "G" is added, this string shall be set to "G".

Return
String This value cannot be null.

getFullInterSignalBiasNanos

Added in API level 30
fun getFullInterSignalBiasNanos(): Double

Gets the GNSS measurement's inter-signal bias in nanoseconds with sub-nanosecond accuracy.

This value is the sum of the estimated receiver-side and the space-segment-side inter-system bias, inter-frequency bias and inter-code bias, including:

  • Receiver inter-constellation bias (with respect to the constellation in .

getFullInterSignalBiasUncertaintyNanos

Added in API level 30
fun getFullInterSignalBiasUncertaintyNanos(): Double

Gets the GNSS measurement's inter-signal bias uncertainty (1 sigma) in nanoseconds with sub-nanosecond accuracy.

The value is only available if hasFullInterSignalBiasUncertaintyNanos() is true.

Return
Double Value is 0.0 or greater

getMultipathIndicator

Added in API level 24
fun getMultipathIndicator(): Int

Gets a value indicating the 'multipath' state of the event.

Return
Int Value is android.location.GnssMeasurement#MULTIPATH_INDICATOR_UNKNOWN, android.location.GnssMeasurement#MULTIPATH_INDICATOR_DETECTED, or android.location.GnssMeasurement#MULTIPATH_INDICATOR_NOT_DETECTED

getPseudorangeRateMetersPerSecond

Added in API level 24
fun getPseudorangeRateMetersPerSecond(): Double

Gets the Pseudorange rate at the timestamp in m/s.

The error estimate for this value is getPseudorangeRateUncertaintyMetersPerSecond().

The value is uncorrected, i.e. corrections for receiver and satellite clock frequency errors are not included.

A positive 'uncorrected' value indicates that the SV is moving away from the receiver. The sign of the 'uncorrected' 'pseudorange rate' and its relation to the sign of 'doppler shift' is given by the equation:

pseudorange rate = -k * doppler shift   (where k is a constant)

getPseudorangeRateUncertaintyMetersPerSecond

Added in API level 24
fun getPseudorangeRateUncertaintyMetersPerSecond(): Double

Gets the pseudorange's rate uncertainty (1-Sigma) in m/s.

The uncertainty is represented as an absolute (single sided) value.

getReceivedSvTimeNanos

Added in API level 24
fun getReceivedSvTimeNanos(): Long

Gets the received GNSS satellite time, at the measurement time, in nanoseconds.

The received satellite time is relative to the beginning of the system week for all constellations except for Glonass where it is relative to the beginning of the Glonass system day.

The table below indicates the valid range of the received GNSS satellite time. These ranges depend on the constellation and code being tracked and the state of the tracking algorithms given by the getState method. The minimum value of this field is zero. The maximum value of this field is determined by looking across all of the state flags that are set, for the given constellation and code type, and finding the the maximum value in this table.

For example, for GPS L1 C/A, if STATE_TOW_KNOWN is set, this field can be any value from 0 to 1 week (in nanoseconds), and for GAL E1B code, if only STATE_GAL_E1BC_CODE_LOCK is set, then this field can be any value from 0 to 4 milliseconds (in nanoseconds.)

GPS/QZSS GLNS BDS GAL SBAS NavIC
State Flag L1 C/A L1 C(P) L5I L5Q L1OF B1I (D1) B1I (D2) B1C (P) B2AQ E1B E1C E5AQ L1 C/A L5C
STATE_UNKNOWN 0 0 0 0 0 0 0 0 0 0 0 0 0 0
STATE_CODE_LOCK 1 ms 10 ms 1 ms 1 ms 1 ms 1 ms 1 ms 10 ms 1 ms - - 1 ms 1 ms 1 ms
STATE_SYMBOL_SYNC - - 10 ms - 10 ms - 2 ms - - - - - 2 ms -
STATE_BIT_SYNC 20 ms - 20 ms - 20 ms 20 ms - - - 8 ms - - 4 ms 20 ms
STATE_SUBFRAME_SYNC 6 s - 6 s - - 6 s - - 100 ms - - 100 ms - 6 s
STATE_TOW_DECODED 1 week - 1 week - - 1 week 1 week - - 1 week 1 week - 1 week 1 week
STATE_TOW_KNOWN 1 week 1 week 1 week 1 week - 1 week 1 week 1 week 1 week 1 week 1 week 1 week 1 week 1 week
STATE_GLO_STRING_SYNC - - - - 2 s - - - - - - - - -
STATE_GLO_TOD_DECODED - - - - 1 day - - - - - - - - -
STATE_GLO_TOD_KNOWN - - - - 1 day - - - - - - - - -
STATE_BDS_D2_BIT_SYNC - - - - - - 2 ms - - - - - - -
STATE_BDS_D2_SUBFRAME_SYNC - - - - - - 600 ms - - - - - - -
STATE_GAL_E1BC_CODE_LOCK - - - - - - - - - 4 ms 4 ms - - -
STATE_GAL_E1C_2ND_CODE_LOCK - - - - - - - - - - 100 ms - - -
STATE_2ND_CODE_LOCK - 18000 ms 10 ms 20 ms - - - 18000 ms 100 ms - - 100 ms - -
STATE_GAL_E1B_PAGE_SYNC - - - - - - - - - 2 s - - - -
STATE_SBAS_SYNC - - - - - - - - - - - - 1 s -

Note: TOW Known refers to the case where TOW is possibly not decoded over the air but has been determined from other sources. If TOW decoded is set then TOW Known must also be set.

Note well: if there is any ambiguity in integer millisecond, STATE_MSEC_AMBIGUOUS must be set accordingly, in the 'state' field. This value must be populated, unless the 'state' == STATE_UNKNOWN.

Note on optional flags:

  • For L1 C/A and B1I, STATE_SYMBOL_SYNC is optional since the symbol length is the same as the bit length.
  • For L5Q and E5aQ, STATE_BIT_SYNC and STATE_SYMBOL_SYNC are optional since they are implied by STATE_CODE_LOCK.
  • STATE_2ND_CODE_LOCK for L5I is optional since it is implied by STATE_SYMBOL_SYNC.
  • STATE_2ND_CODE_LOCK for E1C is optional since it is implied by STATE_GAL_E1C_2ND_CODE_LOCK.
  • For E1B and E1C, STATE_SYMBOL_SYNC is optional, because it is implied by STATE_GAL_E1BC_CODE_LOCK.

getReceivedSvTimeUncertaintyNanos

Added in API level 24
fun getReceivedSvTimeUncertaintyNanos(): Long

Gets the error estimate (1-sigma) for the received GNSS time, in nanoseconds.

getSatelliteInterSignalBiasNanos

Added in API level 30
fun getSatelliteInterSignalBiasNanos(): Double

Gets the GNSS measurement's satellite inter-signal bias in nanoseconds with sub-nanosecond accuracy.

This value is the space-segment-side inter-system bias, inter-frequency bias and inter-code bias, including:

  • Master clock bias (e.g., GPS-GAL Time Offset (GGTO), GPS-UTC Time Offset (TauGps), BDS-GLO Time Offset (BGTO))(with respect to the constellation in .

getSatelliteInterSignalBiasUncertaintyNanos

Added in API level 30
fun getSatelliteInterSignalBiasUncertaintyNanos(): Double

Gets the GNSS measurement's satellite inter-signal bias uncertainty (1 sigma) in nanoseconds with sub-nanosecond accuracy.

The value is only available if hasSatelliteInterSignalBiasUncertaintyNanos() is true.

Return
Double Value is 0.0 or greater

getSnrInDb

Added in API level 24
fun getSnrInDb(): Double

Gets the (post-correlation & integration) Signal-to-Noise ratio (SNR) in dB.

The value is only available if hasSnrInDb() is true.

getSvid

Added in API level 24
fun getSvid(): Int

Gets the satellite ID.

Interpretation depends on getConstellationType(). See GnssStatus#getSvid(int).

getTimeOffsetNanos

Added in API level 24
fun getTimeOffsetNanos(): Double

Gets the time offset at which the measurement was taken in nanoseconds.

The reference receiver's time from which this is offset is specified by GnssClock#getTimeNanos().

The sign of this value is given by the following equation:

measurement time = TimeNanos + TimeOffsetNanos

The value provides an individual time-stamp for the measurement, and allows sub-nanosecond accuracy.

hasAutomaticGainControlLevelDb

Added in API level 26
Deprecated in API level 33
fun hasAutomaticGainControlLevelDb(): Boolean

Deprecated: Use GnssMeasurementsEvent#getGnssAutomaticGainControls() instead.

Returns true if getAutomaticGainControlLevelDb() is available, false otherwise.

hasBasebandCn0DbHz

Added in API level 30
fun hasBasebandCn0DbHz(): Boolean

Returns true if getBasebandCn0DbHz() is available, false otherwise.

hasCarrierCycles

Added in API level 24
Deprecated in API level 28
fun hasCarrierCycles(): Boolean

Deprecated: use getAccumulatedDeltaRangeState() instead.

Returns true if getCarrierCycles() is available, false otherwise.

hasCarrierFrequencyHz

Added in API level 24
fun hasCarrierFrequencyHz(): Boolean

Returns true if getCarrierFrequencyHz() is available, false otherwise.

hasCarrierPhase

Added in API level 24
Deprecated in API level 28
fun hasCarrierPhase(): Boolean

Deprecated: use getAccumulatedDeltaRangeState() instead.

Returns true if getCarrierPhase() is available, false otherwise.

hasCarrierPhaseUncertainty

Added in API level 24
Deprecated in API level 28
fun hasCarrierPhaseUncertainty(): Boolean

Deprecated: use getAccumulatedDeltaRangeState() instead.

Returns true if getCarrierPhaseUncertainty() is available, false otherwise.

hasCodeType

Added in API level 29
fun hasCodeType(): Boolean

Returns true if getCodeType() is available, false otherwise.

hasFullInterSignalBiasNanos

Added in API level 30
fun hasFullInterSignalBiasNanos(): Boolean

Returns true if getFullInterSignalBiasNanos() is available, false otherwise.

hasFullInterSignalBiasUncertaintyNanos

Added in API level 30
fun hasFullInterSignalBiasUncertaintyNanos(): Boolean

Returns true if getFullInterSignalBiasUncertaintyNanos() is available, false otherwise.

hasSatelliteInterSignalBiasNanos

Added in API level 30
fun hasSatelliteInterSignalBiasNanos(): Boolean

Returns true if getSatelliteInterSignalBiasNanos() is available, false otherwise.

hasSatelliteInterSignalBiasUncertaintyNanos

Added in API level 30
fun hasSatelliteInterSignalBiasUncertaintyNanos(): Boolean

Returns true if getSatelliteInterSignalBiasUncertaintyNanos() is available, false otherwise.

hasSnrInDb

Added in API level 24
fun hasSnrInDb(): Boolean

Returns true if getSnrInDb() is available, false otherwise.

toString

Added in API level 24
fun toString(): String
Return
String a string representation of the object.

writeToParcel

Added in API level 24
fun writeToParcel(
    parcel: Parcel,
    flags: Int
): Unit
Parameters
dest The Parcel in which the object should be written. This value cannot be null.
flags Int: Additional flags about how the object should be written. May be 0 or PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of android.os.Parcelable#PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES

Properties

CREATOR

Added in API level 24
static val CREATOR: Parcelable.Creator<GnssMeasurement!>