Resolution MSC.113(73)
PERFORMANCE STANDARDS FOR SHIPBORNE GLONASS RECEIVER EQUIPMENT, REVISED IN 2000
(adopted
on 5 December 2000)
THE
MARITIME SAFETY COMMITTEE,
RECALLING
Article (28(b) of the Convention on the International Maritime Organization concerning
the functions of the Committee,
RECALLING
ALSO resolution A.886(21), by which the Assembly resolved that the function of
adopting performance standards and technical specifications, as well as
amendments thereto shall be performed by the Maritime Safety Committee and/or
the Marine Environment Protection Committee, as appropriate, on behalf of the
Organization,
RECALLING
FURTHER that, in accordance with resolution A.815(19) by which the Assembly
adopted the IMO policy for the recognition and acceptance of suitable
radionavigation systems intended for international use to provide ships with
navigational position-fixing throughout their voyages, the Global Navigation
Satellite System (GLONASS) has been recognized as a possible component of the
world-wide radionavigation system,
NOTING
that shipborne receiving equipment for the worldwide radionavigation system
should be designed to satisfy the detailed requirements of the particular
system concerned,
RECOGNIZING
the need to improve the previously adopted by resolution MSC.53(66) performance
standards for shipborne GLONASS receiver equipment in order to ensure the
operational reliability of such equipment and taking into account the
technological progress and experience gained,
HAVING
CONSIDERED the recommendation on the revision of resolution MSC.53(66) made by
the Sub-Committee on Safety of Navigation at its forty-sixth session,
1.
ADOPTS the Recommendation on Performance Standards for GLONASS Reciever
Equipment, revised in 2000 set out in the annex to the present resolution;
2.
RECOMMENDS Governments to ensure that GLONASS receiver equipment:
a) if installed on or after
1 July 2000 conform to performance standards not inferior to those specified in
the annex to the present resolution; and
b) if installed before 1
July 2003, conform to performance standards not inferior to those specified in
the annex to resolution MSC.53(66).
ANNEX.
RECOMMENDATION ON PERFORMANCE STANDARDS FOR SHIPBORNE GLONASS RECEIVER
EQUIPMENT, REVISED IN 2000
1.1
The Global Navigation Satellite System (GLONASS) is a space-based positioning,
velocity, and time system that has three major segments: Space, Control and
User. The GLONASS Space Segment, will normally be composed of 24 satellites
placed in three orbital planes with eight satellites in each plane. The
satellites operate in circular 19,100 km orbits at an inclination angle of
64.8° and with an 11 h and 15 min period. The spacing of satellites in orbit
will be arranged so that a minimum of four satellites will be in view to users
world-wide, with a position dilution of precision (PDOP) of ≤ 6.
Satellites of the system transmit signals on "L-band frequencies. Each
satellite has separate lettered frequencies L1 (1602, 5625 - 1615.5 Mhz).
1.2
Each L1 frequency carries a code standard accuracy (C), which is used in
shipborne GLONASS receiver equipment. A navigation data message is superimposed
on this code.
1.3
Receiver equipment for the GLONASS intended for navigational purposes on ships
with maximum speeds not exceeding 70 knots should, in addition to the general
requirements contained in resolution A.694(17), comply with the following
minimum performance requirements.
1.4
These standards cover the basic requirements of position-fixing for navigation
purposes only and does not cover other computational facilities which may be in
the equipment.
2.1
The words GLONASS receiver equipment - as used in these performance standards
include all the components and units necessary for the system to properly
perform its intended functions. The equipment should include the following
minimum facilities:
.1 antenna capable of
receiving GLONASS signals;
.2 GLONASS receiver and
processor;
.3 means of accessing the
computed latitude/longitude position;
.4 data control and
interface; and
.5 position display and, if
required, other forms of output.
2.2
The antenna design should be suitable for fitting at a position on the ship
which ensures a clear view of the satellite constellation.
3. PERFORMANCE STANDARDS FOR GLONASS RECEIVER
EQUIPMENT
The
GLONASS receiver equipment should:
.1 be capable of receiving
and processing the Standard Positioning Service (SPS) signals of the GLONASS
system and provide position information in latitude and longitude PZ-90,
co-ordinates in degrees, minutes and thousandths of minutes and time of solution
referenced to UTC (SU). Means should be provided to transform the computed
position based upon PZ-90 into WGS-84 or into data compatible with the datum of
the navigational chart in use. Where this facility exists, the display should
indicate that the co-ordinate conversion is being performed and should identify
the co-ordinate system in which the position is expressed;
.2 operate on the Standard
Positioning Service (on lettered L1 frequencies and C code);
.3 be provided with at least
one output from which position information can be supplied to other equipment.
The output of position information based upon PZ-90 or WGS-84, should be in
accordance with international standards*;
_____________
* IEC Publication 61162.
.4 have static accuracy such
that the position of the antenna is determined to within 45 m (95%) with
horizontal dilution of position (HDOP) ≤ 4 (PDOP ≤ 6);
.5 have dynamic accuracy
such that the position of the antenna is determined to within 45 m (95%) with
horizontal dilution of position (HDOP) ≤ 4 (PDOP ≤ 6) under the
conditions of sea states and ship's motion likely to be experienced in ships*;
.6 be capable of selecting
automatically the appropriate satellite transmitted signals for determination
of the ship's position with the required accuracy and update rate;
.7 be capable of acquiring
satellite signals with input signals having earner levels in the range of -130
dBm to -120 dBm. Once the satellite signals have been acquired the equipment
should continue to operate satisfactorily with satellite signal having carrier
levels down to -133 dBm;
.8 be capable of acquiring
position to the required accuracy, within 30 min, when there is no valid
almanac data;
.9 be capable of acquiring
position to the required accuracy, within 5 min, when there is valid almanac
data;
.10 be capable of
re-acquiring position to the required accuracy, within 5 min, when the GLONASS
signals are interrupted for a period of at least 24 h, but there is no loss of
power;
.11 be capable of
re-acquiring position to the required accuracy, within 2 min, when subjected to
a power interruption of 60 s;
.12 generate and output to a
display and digital interface** a new position solution at least once every 1
s***;
________________
* Resolution A.694(17). Publications IEC 6721
3-6, IEC 6945 and IEC 61108-2.
** Publication IEC 61162 series.
*** For craft meeting the HSC, a new position
solution at least every 0.5 s is recommended.
.13 have a minimum
resolution of position, i.e. latitude and longitude of 0.001 minutes;
.14 generate and output to
the digital interface course over the ground (COG), speed over the ground (SOG)
and universal time co-ordinated (UTC). Such outputs should have a validity mark
aligned with that on the position output. The accuracy requirement for COG and
SOG should not be inferior to the relevant Performance Standards for Heading*
and SDME**;
.15 have the facilities to
receive and process differential GLONASS (DGLONASS) data fed to it in
accordance with the