Author Topic: BeiDou Deployment  (Read 16858 times)

Offline SmallKing

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Re: BeiDou Deployment
« Reply #20 on: 10/26/2017 05:55 am »
Which means at least 18 sats in operation?

I could be wrong, please correct me if necessary
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Offline Galactic Penguin SST

Re: BeiDou Deployment
« Reply #21 on: 11/04/2017 03:06 pm »
Do we actually know who's who for the production of the phase 3 (a.k.a. "global phase") satellites? It looks like that both CAST and CAS' Shanghai Micro-satellite Center are building satellites for the operational global system, with the two scheduled for launch this month coming from CAST and the two launching next month or so coming from CAS.

How many will the two build respectively, and of what type?
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline GELORD

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Re: BeiDou Deployment
« Reply #22 on: 11/04/2017 05:21 pm »
与战士站岗、炊事员做饭一样,航天员是一种职业,工作就是飞行。

Offline GELORD

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Re: BeiDou Deployment
« Reply #23 on: 11/04/2017 05:28 pm »
BEIDOU ALMANAC, 04.11.17
与战士站岗、炊事员做饭一样,航天员是一种职业,工作就是飞行。

Offline GELORD

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与战士站岗、炊事员做饭一样,航天员是一种职业,工作就是飞行。

Offline beidou

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Re: BeiDou Deployment
« Reply #25 on: 11/04/2017 11:17 pm »


It's ridiculous that the BeiDou constellation status is posted on the Glonass official website, while not on the official BeiDou webportal...

Offline Moon Rabbit

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Re: BeiDou Deployment
« Reply #26 on: 11/05/2017 04:34 am »


It's ridiculous that the BeiDou constellation status is posted on the Glonass official website, while not on the official BeiDou webportal...

That was what i thought too :P
It looks like the official page (English version) was last updated in 2015
http://en.beidou.gov.cn/index.html

Nevertheless, the Chinese version looks to be up to date.
http://www.beidou.gov.cn/
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Offline Moon Rabbit

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Re: BeiDou Deployment
« Reply #27 on: 11/05/2017 04:40 am »
From the GLONASS page, a chart (attached) seems to attribute CAST to the production of all (GEO, MEO and IGSO) phase 3 satellites??? (https://www.glonass-iac.ru/en/guide/beidou.php)

 
The Mercury Seven - Carpenter, Cooper, Glenn, Grissom, Schirra, Shepard, Slayton. “Somewhere, something incredible is waiting to be known.” - Carl Sagan

Offline Moon Rabbit

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Re: BeiDou Deployment
« Reply #28 on: 11/05/2017 05:22 am »
...CAS' Shanghai Micro-satellite Center...

How many will the two build respectively, and of what type?

Is the 'Shanghai Micro-satellite Center' the same 'Shanghai Engineering Center for Microsatellite' http://www.microsate.com/
The Mercury Seven - Carpenter, Cooper, Glenn, Grissom, Schirra, Shepard, Slayton. “Somewhere, something incredible is waiting to be known.” - Carl Sagan

Offline Galactic Penguin SST

Re: BeiDou Deployment
« Reply #29 on: 11/05/2017 06:32 am »
...CAS' Shanghai Micro-satellite Center...

How many will the two build respectively, and of what type?

Is the 'Shanghai Micro-satellite Center' the same 'Shanghai Engineering Center for Microsatellite' http://www.microsate.com/

Yes.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline SmallKing

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Re: BeiDou Deployment
« Reply #30 on: 11/05/2017 01:04 pm »
Do we actually know who's who for the production of the phase 3 (a.k.a. "global phase") satellites? It looks like that both CAST and CAS' Shanghai Micro-satellite Center are building satellites for the operational global system, with the two scheduled for launch this month coming from CAST and the two launching next month or so coming from CAS.

How many will the two build respectively, and of what type?
Did some searching work, it seemed the first batch of CAS is 6, maybe all MEO sats? And two are waiting for launch, two are undergoing testing

http://bbs.9ifly.cn/forum.php?mod=redirect&goto=findpost&ptid=6292&pid=543283&fromuid=35435
http://www.chinanews.com/gn/2017/11-02/8367174.shtml
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Offline SmallKing

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Re: BeiDou Deployment
« Reply #31 on: 11/06/2017 03:15 am »
Lei Fanpei said at the 19th National Congress, the BD3 system would reach IOC by the end of next year
CCTV just reported 18 Beidou-3 sats would be on orbit by the end of 2018
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Offline VR2

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Re: BeiDou Deployment
« Reply #32 on: 11/13/2017 07:46 pm »

It's ridiculous that the BeiDou constellation status is posted on the Glonass official website, while not on the official BeiDou webportal...

That was what i thought too :P

Mainly at least somewhere. Here is a source of information: По данным Исследовательского центра тестирования и оценки при Китайской канцелярии по спутниковой навигации.

Additional information here: http://gpsworld.com/the-almanac/

But there is no information about the operation of each satellite. :(

Offline VR2

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Re: BeiDou Deployment
« Reply #33 on: 03/17/2018 07:44 pm »
Staus report from 12.3.2018 (last oldest version - to PRN C17)

Offline VR2

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Re: BeiDou Deployment
« Reply #34 on: 03/17/2018 07:47 pm »
And status report from today (version with 37 (!) satellites)

Offline Galactic Penguin SST

Re: BeiDou Deployment
« Reply #35 on: 03/18/2018 05:56 am »
Is there a source where these graphs can be found, or are they your own work?
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline VR2

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Re: BeiDou Deployment
« Reply #36 on: 03/18/2018 07:44 pm »
Is there a source where these graphs can be found, or are they your own work?
Source exists. I've been looking for him for a long time. :P
http://www.csno-tarc.cn/system/fitness

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Online Satori

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Re: BeiDou Deployment
« Reply #39 on: 06/09/2018 05:21 pm »
Progress and performance evaluation of BeiDou global navigation satellite system: Data analysis based on BDS-3 demonstration system
http://engine.scichina.com/publisher/scp/journal/SCES/61/5/10.1007/s11430-017-9186-9?slug=full%20text


Quote
The first two Medium Earth Orbit (MEO) satellites of the third generation of BeiDou satellite navigation System (BDS-3) were successfully launched on November 5, 2017. This historical launch starts the new era of the global navigation satellite system of BeiDou. Before the first two satellites of BDS-3, a demonstration system for BDS-3 with five satellites, including two Inclined Geosynchronous Orbit satellites (IGSO) and three MEO satellites, was established between 2015 and 2016 for testing the new payloads, new designed signals and new techniques. In the demonstration system, the new S frequency signal and satellite hydrogen clock as well as inter-satellite link (ISL) based on Ka-band signals with time-division multiple addresses (TDMA) were tested. This paper mainly analyzes the performances of the demonstration system, including the signal-to-noise ratios, pseudorange errors and the multipath errors of the civilian signals of BDS-3. The qualities of signals in space, time synchronization and timing precision were tested as well. Most of the performances were compared with those of the regional BeiDou satellite navigation system (BDS-2). At last, the performances of positioning, navigation and timing (PNT) of the future BeiDou global system (BDS-3) were evaluated based on the signal quality of the present demonstration satellite system.