4.2.1.Position determination Proposed modifications AECS 12 nd. meeting Moscow, 9-11 February 2016.

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4.2.1.Position determination Proposed modifications AECS 12 nd. meeting Moscow, 9-11 February 2016

and Part I - General requirements The GNSS receiver shall be able to obtain a position fix at least every second. Time between position fixes needs to be defined in order to be coherent with the current 1Hz signal output set for all the test methods. At this point, this new sentence in the performance requirements section is purely informative. It does not imply any extra burden to the testing procedure The GNSS receiver shall be able to output the navigation solution in a NMEA-0183 protocol format (RMC, GGA, VTG, GSA and GSV message). The AECD setup for NMEA-0183 messages output to external devices shall be described in the operation manual. In order to avoid any misunderstanding on the connectivity between the GNSS receiver and the GNSS simulator, it is eliminated any reference to “external devices” (…)

Annex 8 - Test methods for the navigation solutions Test results are considered successful if navigation information via NMEA protocol is received in all the AECD/AECS samples. In order to avoid misunderstandings and keep coherence in all the test descriptions, there is a need to explicitly mention to repeat the test for the 3 samples also in the “NMEA output” and the “Sensitivity” tests. (…) The test result is considered to be positive in case:  the value of time to first fix in “cold” start mode, as measured in 3.7.7, do not exceed 3600 seconds at signal level on the antenna input of the AECD/AECS of minus 144 dBm in all the AECD/AECS samples;  the GNSS navigation solution is available for at least 600 seconds at signal level on the antenna input of the AECD/AECS of minus 155 dBm as measured in in all the AECD/AECS samples;  and re-acquisition of GNSS signals and calculation of the navigation solution at signal level on the antenna input of the AECD/AECS of minus 150 dBm is possible and time interval measured in does not exceed 60 seconds in all the AECD/AECS samples

Annex 8 - Test methods for the navigation solutions The number of the AECD/AECS test samples shall be at least 3 pieces and can be tested in parallel. In order to reduce 3 times the total GNSS testing timing, it is permitted the use of modern simulators that permit to 'repeat' the tests with the 3 samples in parallel. (…) The test of NMEA-0183 messages output and the assessment of the positioning accuracy in autonomous static mode can be combined In order to save 1 extra hour of GNSS testing, it is offered the chance to test the “assessment of positioning accuracy in autonomous static mode” and the “NMEA messages output” at the same time

Overview on the time needed to test the navigation solution

16.2. Position determination If the AECS is fitted, in accordance with paragraph 1.4. and not yet verified according to Part I of this Regulation, with GNSS receiver supporting at least three GNSS including GLONASS, Galileo and GPS, and is capable of reception and processing of SBAS signals, then the AECS shall comply with the requirements of paragraphs to (…) Sensitivity at receiver input shall be: -GNSS signals detection (cold start) do not exceed 3600 s at signal level on the antenna input of the AECS of minus 144 dBm; -GNSS signals tracking and navigation solution calculation is available for at least 600 s at signal level on the antenna input of the AECS of minus 155 dBm; -Re-acquisition of GNSS signals and calculation of the navigation solution is possible and does not exceed s at signal level on the antenna input of the AECS of minus 150 dBm. (…) The testing procedures in Annex 8 can be performed either on the AECS unit including post processing ability or directly on the GNSS receiver being a part of the AECS. Annex: Minor typo remarks (1/5)

2.1 – It should say: GNSS receiver (instead of navigation receiver) – It should say: GNSS receiver (instead of navigation receiver) – It should say: GNSS receiver (instead of navigation receiver) 3.7 – It should say: GNSS receiver (instead of navigation receiver) – Figure 5 should say: AECD/AECS (instead of The AECD) Annex 8 Test methods for the navigation solutions (paragraphs 7.2 and 17.2) The purpose of the tests in this Annex is to verify the compliance of navigation characteristics of the AECD/AECS calculated by its GNSS receiver navigation module to the requirements defined in sections 7.2 and of this Regulation. Annex: Minor typo remarks (2/5)

Annex: Minor typo remarks (3/5) ( 2), Where - Btruej is the actual value of B coordinate in “j” time moment, in angle arc-seconds - B(j) is the determined by the GNSS receiver value of B coordinate in “j” time moment by the GNSS receiver, angle arc-seconds; (5), Where а is the semi-major semiaxis of ellipsoid, m e – first eccentricity, [0 – 1] φ – determined value ofcurrent latitude, radians Convert calculated coordinates and SD values of latitude and longitude determination from angle arc-seconds to meters according to formulas (4) – (5): (4-1) (4-2) (5-1) (5-2)

Annex: Minor typo remarks (4/5) Table XXX4 – Recommended list of measurement instruments, test and auxiliary equipment

Annex: Minor typo remarks (5/5)