|If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.|
||Thread Tools||Display Modes|
PRN133 ranging now useable for SoL, at non precision approach level
Since PRN133 was set healthy for WAAS corrections, its ranging was
kept at NM (Not Monitored) level, preventing its use for safety of
life applications, however in the last few days, its ranging improved
to UDRE 50 meters, which allows it to contribute for non precision
With this improvement now all 3 WAAS satellites have ranging useable
for navigation. The other two WAAS satellites usually work at UDRE 7.5
meters which allows it to contribute even to precision approaches.
In contrast, GPS satellites normally operate at 3 meters UDRE, the
best accuracy WAAS allows any ranging source to achieve.
PRN133 has been performing at UDRE of 50 with some degradation to 150.
This is most useful in South America since PRN133 has the best view of
South America of all GEOs, and with a WAAS compatible receiver capable
of tracking two SBAS GEOs, you would effectively get two extra GPS
|Thread||Thread Starter||Forum||Replies||Last Post|
|Galaxy XV / PRN 135 geo arrives at 133.1W, WAAS ranging back to 7.5meter UDRE||macpacheco||Instrument Flight Rules||3||April 6th 11 07:17 PM|
|Precision Airmotive LLC||Jerry Springer||Home Built||53||November 11th 07 08:41 PM|
|Some IFR GPS's no longer useable||kevmor||Instrument Flight Rules||2||May 28th 07 02:27 AM|
|Non-precision approach without a published MAP?||Peter R.||Instrument Flight Rules||20||August 1st 06 08:09 AM|
|Completing the Non-precision approach as a Visual Approach||John Clonts||Instrument Flight Rules||45||November 20th 03 05:20 AM|