[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):
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 
Now if we could only get an equivalent 2ns - 3ns timing accuracy out  of 
those receivers as well...

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