[time-nuts] EGNOS officially enabled
SAIDJACK at aol.com
SAIDJACK at aol.com
Fri Oct 2 04:36:22 UTC 2009
Hi guys,
some good news for our European members: the EU officially "enabled" the
EGNOS service as of today.
For those of you that speak German, here is a Wiki link (there are English
links on the bottom of the page too):
_http://de.wikipedia.org/wiki/European_Geostationary_Navigation_Overlay_Service_
(http://de.wikipedia.org/wiki/European_Geostationary_Navigation_Overlay_Service)
For those of you not familiar with SBAS (Sat. Based Augmentation
System(s), there are WAAS, EGNOS, and MSAS signals being sent out by geo-stationary
Sats in the US, Europe, and Asia respectively.
These Sats send out differential correction signals (much like DGPS) over
the same GPS Antenna, and allow accuracies down from ~10 Meters to ~1 Meter
or better with SBAS. Timing receivers should also be significantly improved
with SBAS enabled.
As a side-note, all of our FireFly products have been SBAS enabled by
default since their market introduction almost two years ago, and can thus
generate highly accurate position fixes as well.
In flight testing during maneuvering in a small jet our FireFly-IIA boards
have been tested to have horizontal position errors of less than 0.6
Meters when compared to a high-end reference receiver. This accuracy is possible
mostly due to SBAS/WAAS corrections, and our firmware dynamically
adjusting the Kallmann filters inside the GPS receiver based on velocity and other
factors.
Now if we could only get an equivalent 2ns - 3ns timing accuracy out of
those receivers as well...
bye,
Said
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