SPS with SBAS data

[hannan...@gmail.com]

Hi,

I would like to add sbas data to my stand alone solution, using ublox
lea-4t receiver.

the raw data i know how to get from the gps receiver, but i was unable
to find how to ask for the sbas ephemeris. dose someone knows at which
massage are they?

assuming it is possible having the sbas ephemeris, does some one knows
a reference which explain how to compute the sbas satellite position
using eph data?

regads

[samsvl]

On Jul 2, 10:28 am, "hannan.sa...@gmail.com" <hannan.sa...@gmail.com>
wrote:

Hi Hanan,

I never tried to decode the SBAS messages but you may find them in RXM-
SRFB

The spec:
RTCA/DO-229C (D?):
MINIMUM OPERATIONAL PERFORMANCE STANDARDS FOR
GLOBAL POSITIONING SYSTEM/WIDE AREA AUGMENTATION
SYSTEM AIRBORNE EQUIPMENT

Sam

[Tomoji Takasu]

On 7月2日, 午後5:28, "hannan.sa...@gmail.com" <hannan.sa...@gmail.com>
wrote:

Hello Hannan

RTCA document (RTCA/DO-229) is expensive. You can use FAA WAAS
specification instead. GEO Navigation message type 9 represents the
SBAS
satellite ephemeris.

http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/library/documents

RTKLIB includes SBAS and ublox message decoder. If you have interest,
check it.

http://gpspp.sakura.ne.jp/rtklib/rtklib.htm

Tomoji Takasu