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| sci.geo.satellite-nav (Global Satellite Navigation) (sci.geo.satellite-nav) Discussion of global navigation satellite systems (GNSS). Topics include the technical aspects of GNSS operation, user experiences in the use of GNSS, information regarding GNSS products and discussion of GNSS policy (such as GPS selective availability). |
| Tags: data, sbas, sps |
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#1
July 2nd 09, 08:28 AM
posted to sci.geo.satellite-nav
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SPS with SBAS data
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 
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#2
July 2nd 09, 02:54 PM
posted to sci.geo.satellite-nav
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SPS with SBAS data
On Jul 2, 10:28*am, "
wrote: 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 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
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#3
July 2nd 09, 09:04 PM
posted to sci.geo.satellite-nav
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SPS with SBAS data
On 7ζ2ζ₯, εεΎ5:28, "
wrote: 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 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/...rary/documents RTKLIB includes SBAS and ublox message decoder. If you have interest, check it. http://gpspp.sakura.ne.jp/rtklib/rtklib.htm Tomoji Takasu
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