3 Performance Standards for Galileo Receiver Equipment
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Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.233(82) - Adoption of the Performance Standards for Shipborne Galileo Receiver Equipment - (Adopted on 5 December 2006) - Annex - Performance Standards for Shipborne Galileo Receiver Equipment - 3 Performance Standards for Galileo Receiver Equipment

3 Performance Standards for Galileo Receiver Equipment

 The Galileo receiver equipment should:

  .1 be capable of receiving and processing the Galileo positioning and velocity, and timing signals on:

  • i) for a single frequency receiver, the L1 frequency alone. The receiver should use the ionospheric model broadcast to the receiver by the constellation to generate ionospheric corrections;

  • ii) for a dual frequency receiver, either the L1 and E5b frequencies or the L1 and E5a frequencies. The receiver should use dual frequency processing to generate ionospheric corrections;

  .2 provide position information in latitude and longitude in degrees, minutes and thousandths of minutesfootnote;

  .3 provide time referenced to universal time coordinated UTC (BIPM)footnote;

  .4 be provided with at least two outputs from which position information, UTC, course over ground (COG), speed over ground (SOG) and alarms can be supplied to other equipment. The output of position information should be based on the WGS84 datum and should be in accordance with international standardsfootnote. The output of UTC, course over ground (COG), speed over ground (SOG) and alarms should be consistent with the requirements of 3.16 and 3.18;

  .5 have static accuracy such that the position of the antenna is determined to within:

  • i) 15 m horizontal (95%) and 35 m vertical (95%) for single frequency operations on the L1 frequency;

  • ii) 10 m horizontal (95%) and 10 m vertical (95%) for dual frequency operations on L1 and E5a or L1 and E5b frequenciesfootnote;

  .6 have dynamic accuracy equivalent to the static accuracy specified in .5 above under the sea states and motion experienced in shipsfootnote;

  .7 have position resolution equal or better than 0.001 minutes of latitude and longitude;

  .8 have timing accuracy such that time is determined within 50ns of UTC;

  .9 be capable of selecting automatically the appropriate satellite-transmitted signals to determine the ship's position and velocity, and time with the required accuracy and update rate;

  .10 be capable of acquiring satellite signals with input signals having carrier levels in the range of -128dBm to -118dBm. Once the satellite signals have been acquired, the equipment should continue to operate satisfactorily with satellite signals having carrier levels down to 131dBm;

  .11 be capable of operating satisfactorily under normal interference conditions consistent with the requirements of resolution A.694(17);

  .12 be capable of acquiring position, velocity and time to the required accuracy within 5 min when there is no valid almanac data (cold start);

  .13 be capable of acquiring position, velocity and time to the required accuracy within 1 min when there is valid almanac data (warm start);

  .14 be capable of re-acquiring position, velocity and time to the required accuracy within 1 minute when there has been a service interruption of 60 s or less;

  .15 generate and output to a display and digital interfacefootnote a new position solution at least once every 1 s for conventional craft and at least once every 0.5 s for high-speed craft;

  .16 provide the COG, SOG and UTC outputs, with a validity mark aligned with that on the position output. The accuracy requirements for COG and SOG should not be inferior to the relevant performance standards for headingfootnote and speed and distance measuring equipment (SDME)footnote and the accuracy should be obtained under the various dynamic conditions that could be experienced onboard ships;

  .17 provide at least one normally closed contact, which should indicate failure of the Galileo receiver equipment;

  .18 have a bidirectional interface to facilitate communication so that alarms can be transferred to external systems and so that audible alarms from the Galileo receiver can be acknowledged from external systems; the interface should comply with the relevant international standards;footnote and

  .19 have the facilities to process differential Galileo (dGalileo) data fed to it in accordance with the standards of ITU-Rfootnote and the appropriate RTCMfootnote standard and provide indication of the reception of dGalileo signals and whether they are being applied to the ship's position.

Parent topic: Annex - Performance Standards for Shipborne Galileo Receiver Equipment
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