GnssMeasurement.AdrStateHalfCycleResolved Field
Definition
Important
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Caution
This constant will be removed in the future version. Use Android.Locations.AccumulatedDeltaRangeState enum directly instead of this field.
Reports whether the value #getAccumulatedDeltaRangeMeters() has resolved the half
cycle ambiguity.
[Android.Runtime.Register("ADR_STATE_HALF_CYCLE_RESOLVED", ApiSince=28)]
[System.Obsolete("This constant will be removed in the future version. Use Android.Locations.AccumulatedDeltaRangeState enum directly instead of this field.", true)]
public const Android.Locations.AccumulatedDeltaRangeState AdrStateHalfCycleResolved = 8;[<Android.Runtime.Register("ADR_STATE_HALF_CYCLE_RESOLVED", ApiSince=28)>]
[<System.Obsolete("This constant will be removed in the future version. Use Android.Locations.AccumulatedDeltaRangeState enum directly instead of this field.", true)>]
val mutable AdrStateHalfCycleResolved : Android.Locations.AccumulatedDeltaRangeStateField Value
Value = 8Implements
- Attributes
Remarks
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:
<ul> <li> 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. <li> 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. </ul>
Java documentation for android.location.GnssMeasurement.ADR_STATE_HALF_CYCLE_RESOLVED.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.