Re: DGPS standards? Pleaseeeeeeeee Help

On Mar 5, 7:49 pm, Sam Wormley <sworml...@xxxxxxxxx> wrote:
designer wrote:
Hi all,
I am a new user to this group.
I am searching about DGPS systems.
Is there any specific standard describing exact signal
structures,message formats for
DGPS?????????????
Actually I searched in the net a lot. But was confused a lot.
I came across a standard called RTCM SC 104.
But not sure whether it is the standard used by all the Systems
implemented.(WAAS,EGNOS.....)
Does all the systems like WAAS,EGNOS,GAGAN(India),MSAS etc...use the
same standard for operation.
i.e. same signal structure?????Are they interoperable. i.e. Can A GPS
Rx designed for GAGAN operate in US (WAAS) or EGNOSor MSAS.....
For RTK what is standard to be referred to , to implement in the GPS
Receivers....

Thanks In Advance,
Vittal
INDIA

I've linked some relevant resources here...
http://edu-observatory.org/gps/dgps.html

Looks like I need to do some updating, too.

Hi,
Thanks for replying.
I have some more doubts , which are listed below. Waiting eagerly for
the replies....
1>Is SBAS based receivers (like WAAS,GAGAN,EGNOS) only for Air
navigation (Aircrafts...)???
i.e. Cant they be used for land navigation (like in mobile phones for
navigation)...???????????
2>I think SBAS is also a form of DGPS. i.e. SBAS employs differential
corrections,which are
broadcast thru Geo Stationary satellites...... Am I right ???????
3>I am confused about which protocols to implement in my Receiver,
assuming that it is used for civil purposes
(land,sea,air navigation..), with best possible accuracy,least delay
in tracking, etc....
Please elaborate.
I have not got any clear document regarding the protocols ..... The
information I have got untill now is all wide spread kind of
i.e. confusing.

.

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