[time-nuts] Speaking of Costas loops (WAAS)

Bob Camp lists at rtty.us
Thu Jul 11 12:23:27 EDT 2013


Hi

>From the US patent:

"... and possibility of extending the operating range by allowing increased
separation of reference and base receivers by incorporating ionospheric
models provided by WAAS"

To me that says - position data from WAAS, carrier from GPS.

-----

I have not seen a receiver that produces pseudo range for WAAS (as opposed
to EGNOS).

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Magnus Danielson
Sent: Thursday, July 11, 2013 9:25 AM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Speaking of Costas loops (WAAS)

Hi Bob,

On 07/11/2013 12:32 PM, Bob Camp wrote:
> Hi
>
> If there are no receivers using the service (WAAS as a full GPS sat), it's
either because:
>
> 1) Nobody knows about it
> 2) It does not work
>
> Either way why spend the money to keep it running much better than needed
for WAAS simply for it to be there unused?

There are receivers that produce pseudo-ranges for it [1], and hence can 
use it in nav solutions. I just found a list of such receivers. The 
typical receivers does not discloses exactly how they use the 
WAAS/EGNOS/SBAS signal beyond the obvious correction data.

There is also published works on using the WAAS and EGNOS carrier phase 
reception [2]. There is more if you dig around.

[1] Egnos User Guide. 
http://ec.europa.eu/enterprise/policies/satnav/egnos/files/brochures-leaflet
s/egnos-user-guide_en.pdf

[2] US 6469663. http://www.google.com/patents/US6469663

Cheers,
Magnus
_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.




More information about the time-nuts mailing list