NSR Marine NVR-3000, Руководство по эксплуатации и установке

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NVR-3000 OPERATION MANUAL & INSTALLATION MANUAL
NVR-3000 OM.E 20210412-02 92
S = Simulator mode.
The mode indicator should not be a null field.
NOTE 2: HDOP calculated using all the satellites (GPS, GLONASS, Galileo and any future satellites) used in
computing the solution reported in each GNS sentence.
NOTE 3: Geoidal Separation: the difference between the earth ellipsoid surface and mean-sea-level (geoid)
surface defined by the reference datum used in the position solution, “-” = mean-sea-level surface below
ellipsoid.
The reference datum may be specified in the DTM sentence.
NOTE 4: Age of differential data and Differential Reference Station ID:
a) When the talker is GN and more than one of the satellite systems are used in differential mode, then
the “Age of differential data” and “Differential reference station ID” fields should be null. In this case,
the “Age of differential data” and “Differential reference station ID” fields should be provided in
following GNS sentences with talker IDs of GP, GL, etc. These following GNS messages should have
the latitude, N/S, longitude, E/W, altitude, geoidal separation, mode, and HDOP fields null. This
indicates to the listener that the field is supporting a previous $GNGNS sentence with the same time tag.
The “Number of satellites” field may be used in these following sentences to denote the number of
satellites used from that satellite system.
The Differential Reference station ID may be the same or different for the different satellite systems.
b) Age of Differential Data For GPS Differential Data:
This value is the average age of the most recent differential corrections in use. When only RTCM SC104
Type 1 corrections are used, the age is that of the most recent Type 1 correction. When RTCM SC104
Type 9 corrections are used solely, or in combination with Type 1 corrections, the age is the average of
the most recent corrections for the satellites used. Null field when Differential GPS is not used.
For GLONASS Differential Data:
This value is the average age of the most recent differential corrections in use. When only RTCM SC104
Type 31 corrections are used, the age is that of the most recent Type 31 correction. When RTCM SC104
Type 34 corrections are used solely, or in combination with Type 31 corrections, the age is the average
of the most recent corrections for the satellites used. Null field when differential GLONASS is not used.
For Galileo Differential Data:
This value is the average age of the most recent differential corrections in use. When only RTCM SC104
Type 41 corrections are used, the age is that of the most recent Type 41 correction. When RTCM SC104
Type 42 corrections are used solely, or in combination with Type 41 corrections, the age is the average
of the most recent corrections for the satellites used. Null field when differential Galileo is not used.
NOTE 5: The navigational status indicator is according to IEC 61108 requirements on ‘Navigational (or Failure)
warnings and status indications’. This field should not be a NULL field and the character should take
one of the following values:
S = Safe when the estimated positioning accuracy (95 % confidence) is within the selected accuracy
level corresponding to the actual navigation mode, and integrity is available and within the
requirements for the actual navigation mode, and a new valid position has been calculated within 1
s for a conventional craft and 0,5 s for a high speed craft;
C = Caution when integrity is not available;
U = Unsafe when the estimated positioning accuracy (95% confidence) is less than the selected
accuracy level corresponding to the actual navigation mode, and/or integrity is available but
exceeds the requirements for the actual navigation mode, and/or a new valid position has not been
calculated within 1 s for a conventional craft and 0,5 s for a high speed craft;
V = Navigational status not valid, equipment is not providing navigational status indication.