Does anyone knows any update info related to the ICD of Chinese
Compass? Released? Planned to be?
I think that the plan was to release it in 2010 (from InsideGNSS
article), but as far as I know, it's not available yet.

Thanks
Claudio

On Jul 8, 6:11*am, claudegps <claude...@gmail.com> wrote:
> Does anyone knows any update info related to the ICD of Chinese
> Compass? Released? Planned to be?
> I think that the plan was to release it in 2010 (from InsideGNSS
> article), but as far as I know, it's not available yet.
>
> Thanks
> Claudio

They seem to be struggling with a business model.

These 2010 stories both say that the ICD was being released only to
Chinese companies, with a non-disclosure agreement.

http://research.tdameritrade.com/pub...HomelandStory=

http://www.gpsworld.com/gnss-system/...-compass-10826

Google provides a partial English translation of the Beidou web site
(www.beidou.gov.cn or www.compass.gov.cn).

Looks like more entries on GPS than on Beidou.

On 2011-07-08 11:34 , Ed M. wrote:
> On Jul 8, 6:11 am, claudegps<claude...@gmail.com> wrote:
>> Does anyone knows any update info related to the ICD of Chinese
>> Compass? Released? Planned to be?
>> I think that the plan was to release it in 2010 (from InsideGNSS
>> article), but as far as I know, it's not available yet.
>>
>> Thanks
>> Claudio
>
> They seem to be struggling with a business model.
>
> These 2010 stories both say that the ICD was being released only to
> Chinese companies, with a non-disclosure agreement.
>
> http://research.tdameritrade.com/pub...HomelandStory=
>
> http://www.gpsworld.com/gnss-system/...-compass-10826
>
> Google provides a partial English translation of the Beidou web site
> (www.beidou.gov.cn or www.compass.gov.cn).
>
> Looks like more entries on GPS than on Beidou.

Chinese manufacturers have long benefited from open standards but urge
their government to not reciprocate.

Just another reason to avoid buying Chinese products of all kinds -
though it's become very difficult to do so.

--
gmail originated posts filtered due to spam.

On 2011-07-08 11:34 , Ed M. wrote:
> On Jul 8, 6:11 am, claudegps<claude...@gmail.com> wrote:
>> Does anyone knows any update info related to the ICD of Chinese
>> Compass? Released? Planned to be?
>> I think that the plan was to release it in 2010 (from InsideGNSS
>> article), but as far as I know, it's not available yet.
>>
>> Thanks
>> Claudio
>
> They seem to be struggling with a business model.
>
> These 2010 stories both say that the ICD was being released only to
> Chinese companies, with a non-disclosure agreement.
>
> http://research.tdameritrade.com/pub...HomelandStory=

Something strange in that article:

QUOTE At the end of August 2009, there were only a total of 60,000
Beidou users. The number of registered terminal users was only 1% of the
system's capacity, leaving the satellite resource seriously under-used.
/QUOTE

There seem to be two systems, a current 'two-way' system which would
have capacity restraints and a new system that would be like GPS or
Galileo and not require transmitting to the satellites.

From Wikipedia:

QUOTE
Position calculation
To calculate a position, the following procedure is used:[3]

A signal is transmitted skyward by a remote terminal.

Each of the geostationary satellites receive the signal.

Each satellite sends the accurate time of when each received the
signal to a ground station.

The ground station calculates the longitude and latitude of the remote
terminal, and determines the altitude from a relief map.

The ground station sends the remote terminal's 3D position to the
satellites.

The satellites broadcast the calculated position to the remote terminal.

/QUOTE


But the article on Compass (in Wiki) compares it more closely to
GPS/Galileo in signal format., eg: passive receivers.


--
gmail originated posts filtered due to spam.

On Jul 9, 6:53*pm, Alan Browne <alan.bro...@FreelunchVideotron.ca>
wrote:
> On 2011-07-08 11:34 , Ed M. wrote:
>
> > On Jul 8, 6:11 am, claudegps<claude...@gmail.com> *wrote:
> >> Does anyone knows any update info related to the ICD of Chinese
> >> Compass? Released? Planned to be?
> >> I think that the plan was to release it in 2010 (from InsideGNSS
> >> article), but as far as I know, it's not available yet.
>
> >> Thanks
> >> Claudio
>
> > They seem to be struggling with a business model.
>
> > These 2010 stories both say that the ICD was being released only to
> > Chinese companies, with a non-disclosure agreement.
>
> >http://research.tdameritrade.com/pub...ntable.asp?doc...
>
> Something strange in that article:
>
> QUOTE At the end of August 2009, there were only a total of 60,000
> Beidou users. The number of registered terminal users was only 1% of the
> system's capacity, leaving the satellite resource seriously under-used.
> /QUOTE
>
> There seem to be two systems, a current 'two-way' system which would
> have capacity restraints and a new system that would be like GPS or
> Galileo and not require transmitting to the satellites.
>
> *From Wikipedia:
>
> QUOTE
> Position calculation
> To calculate a position, the following procedure is used:[3]
>
> * A signal is transmitted skyward by a remote terminal.
>
> * Each of the geostationary satellites receive the signal.
>
> * Each satellite sends the accurate time of when each received the
> * signal to a ground station.
>
> * The ground station calculates the longitude and latitude of the remote
> * terminal, and determines the altitude from a relief map.
>
> * The ground station sends the remote terminal's 3D position to the
> * satellites.
>
> The satellites broadcast the calculated position to the remote terminal.
>
> /QUOTE
>
> But the article on Compass (in Wiki) compares it more closely to
> GPS/Galileo in signal format., eg: passive receivers.
>
> --
> gmail originated posts filtered due to spam.

Beidou <> Compass
Beidou is a regional tracking system. It's more comparable to a GPS
+satellite tracking system, while Compass is more of a real GNSS
system.
And yes, China plays the smart I take maximum advantage of openness
coming from other countries while we close down as much as we can.
Positively unfair.
Most products Chinese here means low price but low quality. Avoid as
much as possible...
Anyhow I wouldn't want to depend on either Compass, Beidou or Glonass.
Products from dictatorships, with no track record of playing fair.
Backup only.

Regards,

Marcelo Pacheco

On 10 Lug, 00:11, macpacheco <marc...@macp.eti.br> wrote:
> On Jul 9, 6:53*pm, Alan Browne <alan.bro...@FreelunchVideotron.ca>
> wrote:
>
>
>
>
>
>
>
>
>
> > On 2011-07-08 11:34 , Ed M. wrote:
>
> > > On Jul 8, 6:11 am, claudegps<claude...@gmail.com> *wrote:
> > >> Does anyone knows any update info related to the ICD of Chinese
> > >> Compass? Released? Planned to be?
> > >> I think that the plan was to release it in 2010 (from InsideGNSS
> > >> article), but as far as I know, it's not available yet.
>
> > >> Thanks
> > >> Claudio
>
> > > They seem to be struggling with a business model.
>
> > > These 2010 stories both say that the ICD was being released only to
> > > Chinese companies, with a non-disclosure agreement.
>
> > >http://research.tdameritrade.com/pub...ntable.asp?doc....
>
> > Something strange in that article:
>
> > QUOTE At the end of August 2009, there were only a total of 60,000
> > Beidou users. The number of registered terminal users was only 1% of the
> > system's capacity, leaving the satellite resource seriously under-used.
> > /QUOTE
>
> > There seem to be two systems, a current 'two-way' system which would
> > have capacity restraints and a new system that would be like GPS or
> > Galileo and not require transmitting to the satellites.
>
> > *From Wikipedia:
>
> > QUOTE
> > Position calculation
> > To calculate a position, the following procedure is used:[3]
>
> > * A signal is transmitted skyward by a remote terminal.
>
> > * Each of the geostationary satellites receive the signal.
>
> > * Each satellite sends the accurate time of when each received the
> > * signal to a ground station.
>
> > * The ground station calculates the longitude and latitude of the remote
> > * terminal, and determines the altitude from a relief map.
>
> > * The ground station sends the remote terminal's 3D position to the
> > * satellites.
>
> > The satellites broadcast the calculated position to the remote terminal..
>
> > /QUOTE
>
> > But the article on Compass (in Wiki) compares it more closely to
> > GPS/Galileo in signal format., eg: passive receivers.
>
> > --
> > gmail originated posts filtered due to spam.
>
> Beidou <> Compass
> Beidou is a regional tracking system. It's more comparable to a GPS
> +satellite tracking system, while Compass is more of a real GNSS
> system.

Compass is more similar to GNSS because it have a similar working mode
(similar to all the other constellations ), while Beidou uses
bidirectional comunication between user and satellites to locate the
user (you don't use a "receiver" only)

> And yes, China plays the smart I take maximum advantage of openness
> coming from other countries while we close down as much as we can.
> Positively unfair.
> Most products Chinese here means low price but low quality. Avoid as
> much as possible...
> Anyhow I wouldn't want to depend on either Compass, Beidou or Glonass.
> Products from dictatorships, with no track record of playing fair.
> Backup only.

No one is going to build a single constellation (except for GPS)
receiver. Nor Galileo, Glonass or Compass. But having the capability
of tracking other constellation than GPS gives you much greater
availability of signals/satellites and also you have access to markets
where a a particular constellation is required.
Russia (as far as I know) wants to tax foreign receviers that does not
support Glonass and China may do the same.

On 9 Lug, 23:53, Alan Browne <alan.bro...@FreelunchVideotron.ca>
wrote:
> On 2011-07-08 11:34 , Ed M. wrote:
>
> > On Jul 8, 6:11 am, claudegps<claude...@gmail.com> *wrote:
> >> Does anyone knows any update info related to the ICD of Chinese
> >> Compass? Released? Planned to be?
> >> I think that the plan was to release it in 2010 (from InsideGNSS
> >> article), but as far as I know, it's not available yet.
>
> >> Thanks
> >> Claudio
>
> > They seem to be struggling with a business model.
>
> > These 2010 stories both say that the ICD was being released only to
> > Chinese companies, with a non-disclosure agreement.
>
> >http://research.tdameritrade.com/pub...ntable.asp?doc...
>
> Something strange in that article:
>
> QUOTE At the end of August 2009, there were only a total of 60,000
> Beidou users. The number of registered terminal users was only 1% of the
> system's capacity, leaving the satellite resource seriously under-used.
> /QUOTE
>
> There seem to be two systems, a current 'two-way' system which would
> have capacity restraints and a new system that would be like GPS or
> Galileo and not require transmitting to the satellites.

Yes, there are two:
Beidou - bidirectional comunication between user and satellites
Compass (Beidou 2) - GPS like operating mode - satellites broadcasting
and the user is receiver-only


>
> *From Wikipedia:
>
> QUOTE
> Position calculation
> To calculate a position, the following procedure is used:[3]
>
> * A signal is transmitted skyward by a remote terminal.
>
> * Each of the geostationary satellites receive the signal.
>
> * Each satellite sends the accurate time of when each received the
> * signal to a ground station.
>
> * The ground station calculates the longitude and latitude of the remote
> * terminal, and determines the altitude from a relief map.
>
> * The ground station sends the remote terminal's 3D position to the
> * satellites.
>
> The satellites broadcast the calculated position to the remote terminal.
>
> /QUOTE

This one above is Beidou

> But the article on Compass (in Wiki) compares it more closely to
> GPS/Galileo in signal format., eg: passive receivers.

Yes, Beidou 2 should use passive receivers.