Merge "Clarifiy ADR states in documentation"

    /**

     * Gets 'Accumulated Delta Range' state.

     *

     * <p>It indicates whether {@link #getAccumulatedDeltaRangeMeters()} is reset or there is a

     * cycle slip (indicating 'loss of lock').

     * <p>This indicates the state of the {@link #getAccumulatedDeltaRangeMeters()} measurement. See

     * the table below for a detailed interpretation of each state.

     *

     * <table border="1">

     * <thead>

     * <tr>

     * <th>ADR_STATE</th>

     * <th>Time of relevance</th>

     * <th>Interpretation</th>

     * </tr>

     * </thead>

     * <tbody>

     * <tr>

     * <td>UNKNOWN</td>

     * <td>ADR(t)</td>

     * <td>No valid carrier phase information is available at time t.</td>

     * </tr>

     * <tr>

     * <td>VALID</td>

     * <td>ADR(t)</td>

     * <td>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.</td>

     * </tr>

     * <tr>

     * <td>RESET</td>

     * <td>ADR(t) - ADR(t-1)</td>

     * <td>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.</td>

     * </tr>

     * <tr>

     * <td>CYCLE_SLIP</td>

     * <td>ADR(t) - ADR(t-1)</td>

     * <td>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.</td>

     * </tr>

     * <tr>

     * <td>HALF_CYCLE_RESOLVED</td>

     * <td>ADR(t)</td>

     * <td>Half cycle ambiguity is resolved at time t.</td>

     * </tr>

     * <tr>

     * <td>HALF_CYCLE_REPORTED</td>

     * <td>ADR(t)</td>

     * <td>Half cycle ambiguity is reported at time t.</td>

     * </tr>

     * </tbody>

     * </table>

     */

    @AdrState

    public int getAccumulatedDeltaRangeState() {