The Belt and Road Routes
In August 2017, Test and Assessment Research Center of China Satellite Navigation Office as the leading unit of the monitoring and assessment working group of the China-Russia Satellite Navigation Strategic Cooperation Project Committee jointly carried out the joint observation of BDS and GLONASS along an economic belt of the Silk Way.
Chinese dynamic observation route is from Shaanxi, Xi'an to Huoerguosi in Xinjiang, routing Xi'an, Pingliang, Lanzhou, Wuwei, Zhangye, Jiayuguan, Dunhuang, Hami, Urumqi, Horgos and other major cities along the Silk Way, and ending in Horgos. The route is about 3462km, for a period of 10 days.
Chinese dynamic observation route
Major cities of the Chinese dynamic observation
The experiment within the territory of Russia makes a round trip of 7,000km embracing Moscow, Ufa and Novosibirsk, routing Mofer Lakimir , Nizhny Novgorod, Cheboksare, Kazan, Ufa, Chelyabinsk, Kurgan, after arriving in Novosibirsk, return to Moscow along Omsk, Chelyabinsk, Orenburg, Samara, Penza, and Ryazan.
Russian dynamic observation route
Major cities of the Russian dynamic observation
The Chinese observation contents include standard positioning accuracy, visible satellite number, PDOP value, velocity accuracy, and the additional RDSS success rate testing, single frequency and multi frequency, pseudo range and carrier phase, single system and multi system positioning, and other application modes. application of various models of single frequency and multi frequency, pseudorange and carrier phase, single system and multi system positioning. See the following table for specific observations.
Chinese dynamic observation contents
|1||Dynamic Observation||Xi'an to Horgos||Positioning Accuracy||• BDS B1I, B2I, B3I;
• GLONASS G1, G2;
• BDS B1I+GLONASS G1
|2||Velocity Accuracy||• BDS B1I, B2I, B3I;
• GLONASS G1, G2;
• BDS B1I+GLONASS G1
|3||PDOP Value||• BDS;
|4||PDOP Availability（PODP≤6）||• BDS;
|5||Visible Satellite Number||• BDS;
|6||Service Availability||• BDS;
|7||RDSS Success Rate|| • User Positioning Accuracy;
• RDSS Communication Success Rate
The Chinese observation system is mainly composed of the dynamic test vehicle and the observation equipment.
Chinese dynamic test vehicle
Chinese observation equipment mainly includes all band navigation antenna, dynamic reference receiver, high-precision receiver, power divider, switchboard and test computer, etc.. The full band navigation antenna is fixed on the roof, and the other observation equipments are deployed in the vehicle. The on-board 220V AC power supply is adopted. Using star based enhancement equipment as a large range of dynamic observation benchmark, the benchmark accuracy is better than 1m.
Chinese dynamic observation equipment
Chinese dynamic observation tracking
|No.||Routing Cities||Distance||Date||Rest Land|
|1||Xi'an to Pingliang||320km||2017.08.07||Pingliang|
|2||Pingliang to Lanzhou||323km||2017.08.08||Lanzhou|
|3||Lanzhou to Zhangye||506km||2017.08.09||Zhangye|
|4||Zhangye to Dunhuang||664km||2017.08.10||Dunhuang|
|5||Dunhuang to Hami||420km||2017.08.12||Hami|
|6||Hami to Urumqi||587km||2017.08.13||Urumqi|
|7||Urumqi to Khorgos||642km||2017.08.14||Khorgos|
|8||Return to Urumqi from Khorgos||2017.08.15||Urumqi|
(1) BDS B1I Positioning Accuracy
Distribution of horizontal accuracy of BDS B1I along observation routes
Distribution of vertical accuracy of BDS B1I along observation routes
BDS B1I standard positioning accuracy
(2) BDS B2I Positioning Accuracy
BDS B2I standard positioning accuracy
(3) Visible Satellite Number and PDOP
Change sequence chart of visible satellite number and PDOP
Statistical accuracy of positioning results for BDS B1I and B2I (m)
The observation results show that the standard positioning of BDS frequency points is stable and reliable. The horizontal positioning accuracy of BDS B1I is 2.71M (95%), and the altitude positioning accuracy is 4.15M (95%), which meets the requirements of the BeiDou Navigation Satellite System Open Service Performance Standard (Version 1.0). In the observation process, the average number of visible satellites is about 9, and at most times (95%) visible satellites exceed 7 stars. The probability of PDOP is 96.38% , and at most times (95%) PDOP is 5.70.