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GnssMeasurement

public final class GnssMeasurement
extends Object implements Parcelable

java.lang.Object
↳	android.location.GnssMeasurement

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

Summary

Constants
`int`	`ADR_STATE_CYCLE_SLIP` The state of the `getAccumulatedDeltaRangeMeters()` has a cycle slip detected.
`int`	`ADR_STATE_HALF_CYCLE_REPORTED` Reports whether the flag `ADR_STATE_HALF_CYCLE_RESOLVED` has been reported by the GNSS hardware.
`int`	`ADR_STATE_HALF_CYCLE_RESOLVED` Reports whether the value `getAccumulatedDeltaRangeMeters()` has resolved the half cycle ambiguity.
`int`	`ADR_STATE_RESET` The state of the `getAccumulatedDeltaRangeMeters()` has detected a reset.
`int`	`ADR_STATE_UNKNOWN` The state of the value `getAccumulatedDeltaRangeMeters()` is invalid or unknown.
`int`	`ADR_STATE_VALID` The state of the `getAccumulatedDeltaRangeMeters()` is valid.
`int`	`MULTIPATH_INDICATOR_DETECTED` The measurement shows signs of multi-path.
`int`	`MULTIPATH_INDICATOR_NOT_DETECTED` The measurement shows no signs of multi-path.
`int`	`MULTIPATH_INDICATOR_UNKNOWN` The indicator is not available or the presence or absence of multipath is unknown.
`int`	`STATE_2ND_CODE_LOCK` This GNSS measurement's tracking state has secondary code lock.
`int`	`STATE_BDS_D2_BIT_SYNC` This Beidou measurement's tracking state has D2 bit sync.
`int`	`STATE_BDS_D2_SUBFRAME_SYNC` This Beidou measurement's tracking state has D2 sub-frame sync.
`int`	`STATE_BIT_SYNC` This GNSS measurement's tracking state has bit sync.
`int`	`STATE_CODE_LOCK` This GNSS measurement's tracking state has code lock.
`int`	`STATE_GAL_E1BC_CODE_LOCK` This Galileo measurement's tracking state has E1B/C code lock.
`int`	`STATE_GAL_E1B_PAGE_SYNC` This Galileo measurement's tracking state has E1B page sync.
`int`	`STATE_GAL_E1C_2ND_CODE_LOCK` This Galileo measurement's tracking state has E1C secondary code lock.
`int`	`STATE_GLO_STRING_SYNC` This Glonass measurement's tracking state has string sync.
`int`	`STATE_GLO_TOD_DECODED` This Glonass measurement's tracking state has time-of-day decoded.
`int`	`STATE_GLO_TOD_KNOWN` This Glonass measurement's tracking state has time-of-day known, possibly not decoded over the air but has been determined from other sources.
`int`	`STATE_MSEC_AMBIGUOUS` This GNSS measurement's tracking state contains millisecond ambiguity.
`int`	`STATE_SBAS_SYNC` This SBAS measurement's tracking state has whole second level sync.
`int`	`STATE_SUBFRAME_SYNC` This GNSS measurement's tracking state has sub-frame sync.
`int`	`STATE_SYMBOL_SYNC` This GNSS measurement's tracking state has symbol sync.
`int`	`STATE_TOW_DECODED` This GNSS measurement's tracking state has time-of-week decoded.
`int`	`STATE_TOW_KNOWN` This GNSS measurement's tracking state has time-of-week known, possibly not decoded over the air but has been determined from other sources.
`int`	`STATE_UNKNOWN` This GNSS measurement's tracking state is invalid or unknown.

Inherited constants

From interface android.os.Parcelable

`int`	`CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int`	`PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

Fields
`public static final Creator<GnssMeasurement>`	`CREATOR`

Public methods
`int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`double`	`getAccumulatedDeltaRangeMeters()` Gets the accumulated delta range since the last channel reset, in meters.
`int`	`getAccumulatedDeltaRangeState()` Gets 'Accumulated Delta Range' state.
`double`	`getAccumulatedDeltaRangeUncertaintyMeters()` Gets the accumulated delta range's uncertainty (1-Sigma) in meters.
`double`	`getAutomaticGainControlLevelDb()` Gets the Automatic Gain Control level in dB.
`double`	`getBasebandCn0DbHz()` Gets the baseband carrier-to-noise density in dB-Hz.
`long`	`getCarrierCycles()` This method is deprecated. use `getAccumulatedDeltaRangeMeters()` instead.
`float`	`getCarrierFrequencyHz()` Gets the carrier frequency of the tracked signal.
`double`	`getCarrierPhase()` This method is deprecated. use `getAccumulatedDeltaRangeMeters()` instead.
`double`	`getCarrierPhaseUncertainty()` This method is deprecated. use `getAccumulatedDeltaRangeUncertaintyMeters()` instead.
`double`	`getCn0DbHz()` Gets the Carrier-to-noise density in dB-Hz.
`String`	`getCodeType()` Gets the GNSS measurement's code type.
`int`	`getConstellationType()` Gets the constellation type.
`double`	`getFullInterSignalBiasNanos()` Gets the GNSS measurement's inter-signal bias in nanoseconds with sub-nanosecond accuracy.
`double`	`getFullInterSignalBiasUncertaintyNanos()` Gets the GNSS measurement's inter-signal bias uncertainty (1 sigma) in nanoseconds with sub-nanosecond accuracy.
`int`	`getMultipathIndicator()` Gets a value indicating the 'multipath' state of the event.
`double`	`getPseudorangeRateMetersPerSecond()` Gets the Pseudorange rate at the timestamp in m/s.
`double`	`getPseudorangeRateUncertaintyMetersPerSecond()` Gets the pseudorange's rate uncertainty (1-Sigma) in m/s.
`long`	`getReceivedSvTimeNanos()` Gets the received GNSS satellite time, at the measurement time, in nanoseconds.
`long`	`getReceivedSvTimeUncertaintyNanos()` Gets the error estimate (1-sigma) for the received GNSS time, in nanoseconds.
`double`	`getSatelliteInterSignalBiasNanos()` Gets the GNSS measurement's satellite inter-signal bias in nanoseconds with sub-nanosecond accuracy.
`double`	`getSatelliteInterSignalBiasUncertaintyNanos()` Gets the GNSS measurement's satellite inter-signal bias uncertainty (1 sigma) in nanoseconds with sub-nanosecond accuracy.
`double`	`getSnrInDb()` Gets the (post-correlation & integration) Signal-to-Noise ratio (SNR) in dB.
`int`	`getState()` Gets per-satellite-signal sync state.
`int`	`getSvid()` Gets the satellite ID.
`double`	`getTimeOffsetNanos()` Gets the time offset at which the measurement was taken in nanoseconds.
`boolean`	`hasAutomaticGainControlLevelDb()` Returns `true` if `getAutomaticGainControlLevelDb()` is available, `false` otherwise.
`boolean`	`hasBasebandCn0DbHz()` Returns `true` if `getBasebandCn0DbHz()` is available, `false` otherwise.
`boolean`	`hasCarrierCycles()` This method is deprecated. use `getAccumulatedDeltaRangeState()` instead.
`boolean`	`hasCarrierFrequencyHz()` Returns `true` if `getCarrierFrequencyHz()` is available, `false` otherwise.
`boolean`	`hasCarrierPhase()` This method is deprecated. use `getAccumulatedDeltaRangeState()` instead.
`boolean`	`hasCarrierPhaseUncertainty()` This method is deprecated. use `getAccumulatedDeltaRangeState()` instead.
`boolean`	`hasCodeType()` Returns `true` if `getCodeType()` is available, `false` otherwise.
`boolean`	`hasFullInterSignalBiasNanos()` Returns `true` if `getFullInterSignalBiasNanos()` is available, `false` otherwise.
`boolean`	`hasFullInterSignalBiasUncertaintyNanos()` Returns `true` if `getFullInterSignalBiasUncertaintyNanos()` is available, `false` otherwise.
`boolean`	`hasSatelliteInterSignalBiasNanos()` Returns `true` if `getSatelliteInterSignalBiasNanos()` is available, `false` otherwise.
`boolean`	`hasSatelliteInterSignalBiasUncertaintyNanos()` Returns `true` if `getSatelliteInterSignalBiasUncertaintyNanos()` is available, `false` otherwise.
`boolean`	`hasSnrInDb()` Returns `true` if `getSnrInDb()` is available, `false` otherwise.
`String`	`toString()` Returns a string representation of the object.
`void`	`writeToParcel(Parcel parcel, int flags)` Flatten this object in to a Parcel.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


        
          android.os.Parcelable

`abstract int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Constants

ADR_STATE_CYCLE_SLIP

public static final int ADR_STATE_CYCLE_SLIP

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

Constant Value: 4 (0x00000004)

ADR_STATE_HALF_CYCLE_REPORTED

public static final int ADR_STATE_HALF_CYCLE_REPORTED

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.

Constant Value: 16 (0x00000010)

ADR_STATE_HALF_CYCLE_RESOLVED

public static final int ADR_STATE_HALF_CYCLE_RESOLVED

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.

Constant Value: 8 (0x00000008)

ADR_STATE_RESET

public static final int ADR_STATE_RESET

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

Constant Value: 2 (0x00000002)

ADR_STATE_UNKNOWN

public static final int ADR_STATE_UNKNOWN

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

Constant Value: 0 (0x00000000)

ADR_STATE_VALID

public static final int ADR_STATE_VALID

The state of the getAccumulatedDeltaRangeMeters() is valid.

Constant Value: 1 (0x00000001)

MULTIPATH_INDICATOR_DETECTED

public static final int MULTIPATH_INDICATOR_DETECTED

The measurement shows signs of multi-path.

Constant Value: 1 (0x00000001)

MULTIPATH_INDICATOR_NOT_DETECTED

public static final int MULTIPATH_INDICATOR_NOT_DETECTED

The measurement shows no signs of multi-path.

Constant Value: 2 (0x00000002)

MULTIPATH_INDICATOR_UNKNOWN

public static final int MULTIPATH_INDICATOR_UNKNOWN

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

Constant Value: 0 (0x00000000)

STATE_2ND_CODE_LOCK

public static final int STATE_2ND_CODE_LOCK

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

Constant Value: 65536 (0x00010000)

STATE_BDS_D2_BIT_SYNC

public static final int STATE_BDS_D2_BIT_SYNC

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

Constant Value: 256 (0x00000100)

STATE_BDS_D2_SUBFRAME_SYNC

public static final int STATE_BDS_D2_SUBFRAME_SYNC

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

Constant Value: 512 (0x00000200)

STATE_BIT_SYNC

public static final int STATE_BIT_SYNC

This GNSS measurement's tracking state has bit sync.

Constant Value: 2 (0x00000002)

STATE_CODE_LOCK

public static final int STATE_CODE_LOCK

This GNSS measurement's tracking state has code lock.

Constant Value: 1 (0x00000001)

STATE_GAL_E1BC_CODE_LOCK

public static final int STATE_GAL_E1BC_CODE_LOCK

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

Constant Value: 1024 (0x00000400)

STATE_GAL_E1B_PAGE_SYNC

public static final int STATE_GAL_E1B_PAGE_SYNC

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

Constant Value: 4096 (0x00001000)

STATE_GAL_E1C_2ND_CODE_LOCK

public static final int STATE_GAL_E1C_2ND_CODE_LOCK

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

Constant Value: 2048 (0x00000800)

STATE_GLO_STRING_SYNC

public static final int STATE_GLO_STRING_SYNC

This Glonass measurement's tracking state has string sync.

Constant Value: 64 (0x00000040)

STATE_GLO_TOD_DECODED

public static final int STATE_GLO_TOD_DECODED

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

Constant Value: 128 (0x00000080)

STATE_GLO_TOD_KNOWN

public static final int STATE_GLO_TOD_KNOWN

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.

Constant Value: 32768 (0x00008000)

STATE_MSEC_AMBIGUOUS

public static final int STATE_MSEC_AMBIGUOUS

This GNSS measurement's tracking state contains millisecond ambiguity.

Constant Value: 16 (0x00000010)

STATE_SBAS_SYNC

public static final int STATE_SBAS_SYNC

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

Constant Value: 8192 (0x00002000)

STATE_SUBFRAME_SYNC

public static final int STATE_SUBFRAME_SYNC

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

Constant Value: 4 (0x00000004)

STATE_SYMBOL_SYNC

public static final int STATE_SYMBOL_SYNC

This GNSS measurement's tracking state has symbol sync.

Constant Value: 32 (0x00000020)

STATE_TOW_DECODED

public static final int STATE_TOW_DECODED

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

Constant Value: 8 (0x00000008)

STATE_TOW_KNOWN

public static final int STATE_TOW_KNOWN

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.

Constant Value: 16384 (0x00004000)

STATE_UNKNOWN

public static final int STATE_UNKNOWN

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

Constant Value: 0 (0x00000000)

Fields

CREATOR

public static final Creator<GnssMeasurement> CREATOR

Public methods

describeContents

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
`int`	a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or `CONTENTS_FILE_DESCRIPTOR`

getAccumulatedDeltaRangeMeters

public double getAccumulatedDeltaRangeMeters ()

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.

Returns
`double`

getAccumulatedDeltaRangeState

public int getAccumulatedDeltaRangeState ()

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.

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.

Returns
`int`	Value is either `0` or a combination of `ADR_STATE_UNKNOWN`, `ADR_STATE_VALID`, `ADR_STATE_RESET`, `ADR_STATE_CYCLE_SLIP`, `ADR_STATE_HALF_CYCLE_RESOLVED`, and `ADR_STATE_HALF_CYCLE_REPORTED`

getAccumulatedDeltaRangeUncertaintyMeters

public double getAccumulatedDeltaRangeUncertaintyMeters ()

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().

Returns
`double`

getAutomaticGainControlLevelDb

public double getAutomaticGainControlLevelDb ()

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

Returns
`double`

getBasebandCn0DbHz

public double getBasebandCn0DbHz ()

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().

Returns
`double`	Value is between 0 and 63 inclusive

getCarrierCycles

public long getCarrierCycles ()

This method is 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.

Returns
`long`

getCarrierFrequencyHz

public float getCarrierFrequencyHz ()

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.

Returns
`float`	the carrier frequency of the signal tracked in Hz.

getCarrierPhase

public double getCarrierPhase ()

This method is 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.

Returns
`double`

getCarrierPhaseUncertainty

public double getCarrierPhaseUncertainty ()

This method is 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.

Returns
`double`

getCn0DbHz

public double getCn0DbHz ()

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.

Returns
`double`	Value is between 0 and 63 inclusive

getCodeType

public String getCodeType ()

Gets the GNSS measurement's code type.

Similar to the Attribute field described in RINEX 3.03, e.g., in Tables 4-10, and Table A2 at the RINEX 3.03 Update 1 Document.

Returns "A" for GALILEO E1A, GALILEO E6A, IRNSS L5A, IRNSS SA.

Returns "B" for GALILEO E1B, GALILEO E6B, IRNSS L5B, IRNSS SB.

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, IRNSS L5C.

Returns "D" for BDS B1C D.

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), LEX(6) L.

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 P.

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), LEX(6) S.

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 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), LEX(6) (S+L), BDS B1 (I+Q), BDS B1C (D+P), BDS B2 (I+Q), BDS B3 (I+Q), IRNSS L5 (B+C).

Returns "Y" for GPS L1Y, GPS L2Y.

Returns "Z" for GALILEO E1 (A+B+C), GALILEO E6 (A+B+C), QZSS L1-SAIF.

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

This is used to specify the observation descriptor defined in GNSS Observation Data File Header Section Description in the RINEX standard (Version 3.XX), in cases where the code type does not align with the above listed values. For example, if a code type "G" is added, this string shall be set to "G".

Returns
`String`	This value cannot be `null`.

getConstellationType

public int getConstellationType ()

Gets the constellation type.

The return value is one of those constants with CONSTELLATION_ prefix in GnssStatus.

Returns
`int`	Value is `GnssStatus.CONSTELLATION_UNKNOWN`, `GnssStatus.CONSTELLATION_GPS`, `GnssStatus.CONSTELLATION_SBAS`, `GnssStatus.CONSTELLATION_GLONASS`, `GnssStatus.CONSTELLATION_QZSS`, `GnssStatus.CONSTELLATION_BEIDOU`, `GnssStatus.CONSTELLATION_GALILEO`, or `GnssStatus.CONSTELLATION_IRNSS`

getFullInterSignalBiasNanos

public double getFullInterSignalBiasNanos ()

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 GnssClock#getReferenceConstellationTypeForIsb()

Returns

double

getFullInterSignalBiasUncertaintyNanos

public double getFullInterSignalBiasUncertaintyNanos ()

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.

Returns
`double`	Value is 0.0 or greater

getMultipathIndicator

public int getMultipathIndicator ()

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

Returns
`int`	Value is `MULTIPATH_INDICATOR_UNKNOWN`, `MULTIPATH_INDICATOR_DETECTED`, or `MULTIPATH_INDICATOR_NOT_DETECTED`

getPseudorangeRateMetersPerSecond

public double getPseudorangeRateMetersPerSecond ()

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)

Returns
`double`

getPseudorangeRateUncertaintyMetersPerSecond

public double getPseudorangeRateUncertaintyMetersPerSecond ()

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

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

Returns
`double`

getReceivedSvTimeNanos

public long getReceivedSvTimeNanos ()

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

State Flag L1 C/A L5I L5Q L1OF B1I (D1) B1I (D2) E1B E1C E5AQ L1 C/A

STATE_UNKNOWN 0 0 0 0 0 0 0 0 0 0

STATE_CODE_LOCK 1 ms 1 ms 1 ms 1 ms 1 ms 1 ms - - 1 ms 1 ms

STATE_SYMBOL_SYNC 20 ms (optional) 10 ms 1 ms (optional) 10 ms 20 ms (optional) 2 ms 4 ms (optional) 4 ms (optional) 1 ms (optional) 2 ms

STATE_BIT_SYNC 20 ms 20 ms 1 ms (optional) 20 ms 20 ms - 8 ms - 1 ms (optional) 4 ms

STATE_SUBFRAME_SYNC 6s 6s - 2 s 6 s - - - 100 ms -

STATE_TOW_DECODED 1 week - 1 day 1 week 1 week - 1 week

STATE_TOW_KNOWN 1 week 1 day 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 - 10 ms (optional) 20 ms - - - - 100 ms (optional) 100 ms -

STATE_GAL_E1B_PAGE_SYNC - - - - - - 2 s - - -

STATE_SBAS_SYNC - - - - - - - - - 1 s

	GPS/QZSS	GLNS	BDS	GAL	SBAS
STATE_UNKNOWN	0	0	0	0	0	0	0	0	0	0
STATE_CODE_LOCK	1 ms	1 ms	1 ms	1 ms	1 ms	1 ms	-	-	1 ms	1 ms
STATE_SYMBOL_SYNC	20 ms (optional)	10 ms	1 ms (optional)	10 ms	20 ms (optional)	2 ms	4 ms (optional)	4 ms (optional)	1 ms (optional)	2 ms
STATE_BIT_SYNC	20 ms	20 ms	1 ms (optional)	20 ms	20 ms	-	8 ms	-	1 ms (optional)	4 ms
STATE_SUBFRAME_SYNC	6s	6s	-	2 s	6 s	-	-	-	100 ms	-
STATE_TOW_DECODED	1 week	-	1 day	1 week	1 week	-	1 week
STATE_TOW_KNOWN	1 week	1 day	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	-	10 ms (optional)	20 ms	-	-	-	-	100 ms (optional)	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.

Returns
`long`

getReceivedSvTimeUncertaintyNanos

public long getReceivedSvTimeUncertaintyNanos ()

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

Returns
`long`

getSatelliteInterSignalBiasNanos

public double getSatelliteInterSignalBiasNanos ()

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 GnssClock#getReferenceConstellationTypeForIsb()

Returns

double

getSatelliteInterSignalBiasUncertaintyNanos

public double getSatelliteInterSignalBiasUncertaintyNanos ()

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.

Returns
`double`	Value is 0.0 or greater

getSnrInDb

public double getSnrInDb ()

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

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

Returns
`double`

getState

public int getState ()

Gets per-satellite-signal sync state.

It represents the current sync state for the associated satellite signal.

This value helps interpret getReceivedSvTimeNanos().

Returns

Returns
`int`	Value is either `0` or a combination of `STATE_CODE_LOCK`, `STATE_BIT_SYNC`, `STATE_SUBFRAME_SYNC`, `STATE_TOW_DECODED`, `STATE_MSEC_AMBIGUOUS`, `STATE_SYMBOL_SYNC`, `STATE_GLO_STRING_SYNC`, `STATE_GLO_TOD_DECODED`, `STATE_BDS_D2_BIT_SYNC`, `STATE_BDS_D2_SUBFRAME_SYNC`, `STATE_GAL_E1BC_CODE_LOCK`, `STATE_GAL_E1C_2ND_CODE_LOCK`, `STATE_GAL_E1B_PAGE_SYNC`, `STATE_SBAS_SYNC`, `STATE_TOW_KNOWN`, `STATE_GLO_TOD_KNOWN`, and `STATE_2ND_CODE_LOCK`

int

Value is either 0 or a combination of STATE_CODE_LOCK, STATE_BIT_SYNC, STATE_SUBFRAME_SYNC, STATE_TOW_DECODED, STATE_MSEC_AMBIGUOUS, STATE_SYMBOL_SYNC, STATE_GLO_STRING_SYNC, STATE_GLO_TOD_DECODED, STATE_BDS_D2_BIT_SYNC, STATE_BDS_D2_SUBFRAME_SYNC, STATE_GAL_E1BC_CODE_LOCK, STATE_GAL_E1C_2ND_CODE_LOCK, STATE_GAL_E1B_PAGE_SYNC, STATE_SBAS_SYNC, STATE_TOW_KNOWN, STATE_GLO_TOD_KNOWN, and STATE_2ND_CODE_LOCK

getSvid

public int getSvid ()

Gets the satellite ID.

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

Returns
`int`

getTimeOffsetNanos

public double getTimeOffsetNanos ()

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.

Returns
`double`

hasAutomaticGainControlLevelDb

public boolean hasAutomaticGainControlLevelDb ()

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

Returns
`boolean`

hasBasebandCn0DbHz

public boolean hasBasebandCn0DbHz ()

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

Returns
`boolean`

hasCarrierCycles

public boolean hasCarrierCycles ()

This method is deprecated.
use getAccumulatedDeltaRangeState() instead.

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

Returns
`boolean`

hasCarrierFrequencyHz

public boolean hasCarrierFrequencyHz ()

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

Returns
`boolean`

hasCarrierPhase

public boolean hasCarrierPhase ()

This method is deprecated.
use getAccumulatedDeltaRangeState() instead.

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

Returns
`boolean`

hasCarrierPhaseUncertainty

public boolean hasCarrierPhaseUncertainty ()

This method is deprecated.
use getAccumulatedDeltaRangeState() instead.

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

Returns
`boolean`

hasCodeType

public boolean hasCodeType ()

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

Returns
`boolean`

hasFullInterSignalBiasNanos

public boolean hasFullInterSignalBiasNanos ()

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

Returns
`boolean`

hasFullInterSignalBiasUncertaintyNanos

public boolean hasFullInterSignalBiasUncertaintyNanos ()

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

Returns
`boolean`

hasSatelliteInterSignalBiasNanos

public boolean hasSatelliteInterSignalBiasNanos ()

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

Returns
`boolean`

hasSatelliteInterSignalBiasUncertaintyNanos

public boolean hasSatelliteInterSignalBiasUncertaintyNanos ()

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

Returns
`boolean`

hasSnrInDb

public boolean hasSnrInDb ()

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

Returns
`boolean`

toString

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
`String`	a string representation of the object.

writeToParcel

public void writeToParcel (Parcel parcel, 
                int flags)

Flatten this object in to a Parcel.

Parameters
`parcel`	`Parcel`: The Parcel in which the object should be written.
`flags`	`int`: Additional flags about how the object should be written. May be 0 or `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES