Tom, I’m not sure what makes you feel compelled to bring your demonstrably large and well respected intellect to bear in defense of “balanced reporting” of this issue in a seeming attempt to shut down further discussion….are you saying there should be no discussion about RAIM or NANU or jamming vs observed outages of Navstar because: “hell, it’s way more reliable than ground based aids…and we don’t discuss them everything they mysteriously fail do we?” (Do they “mysteriously” fail anyway?…usually they are also Notamed)…
As this is clearly way off-topic I have started a new thread on RAIM Prediction…
Michael wrote:
@C210_Flyer – Did you see your Centurion in one of the photos in Corfu ?
Yes and Peter takes professional pictures so Im pleased.
Peter wrote:
Nice ATC just pretended to not hear me when I asked for a climb to FL150.
I wonder what Niece would have done if after calling and not getting a response for permission to climb to FL150 you said “Wilco NXXX cleared to climb to FL150”
Peter wrote:
Sure there is reporting bias in everything that’s reported.
Let me put it this way. These are all radio systems, so they eventually fail (be it due to interference, or due to the ionosphere acting up (Mögel-Dellinger, Aurora). I find it a remarkable testament to the reliability of GNSS that people feel compelled to discuss every outage, while outages with other navigation systems, such as VOR, DME, NDB are apparently daily business not worth reporting 
I also noticed the loss of the GPS signal at the same location just a few minutes after daparture at LGAV, the same day I think (on a monday, around 10 o clock LT)
No, I didn’t check anything afterwards. I assumed it was simply jamming. It’s very rare but I have seen it before. Someone else reported it at the same location, some weeks before/after.
Sure there is reporting bias in everything that’s reported. I mean, one doesn’t report flights on which GPS worked 
But that’s how people learn; it is what separates us from monkeys, etc. If you climb a tree 100 times and don’t fall off, you will never learn that you might fall off, but if somebody else falls off and tells you, you can implement countermeasures
Ok….my question was whether Peter had checked for RAIM outages….which AFAIK is required for a non-WAAS navigator….and assuming he had but still experienced an outage did he retrospectively check for NANUs…. Sorry if that’s somehow reporting bias
AnthonyQ wrote:
Interesting loss of GPS signal over Athens
Isn’t there some reporting bias going on? If I posted a message every time my DME (King KN-62) lost ranging (invariably during approaches, as enroute nav is nowadays GNSS exclusively) without a NOTAM, you’d probably be more worried about DME than GNSS
But agreed, a backup for all nav technologies is needed…
Excellent….
Interesting loss of GPS signal over Athens….I presume the RAIM prediction was ok and there were no Notams….quite a worry….did you check the USCG NANU site?
@C210_Flyer – Did you see your Centurion in one of the photos in Corfu ?
Too long
The whole process, starting with ~1500 raw pics (of which 2/3 were discarded, after processing the retained ones in Lightroom) and ending up with the final pics for my own album, and writing the report, about 4 days.
The report is my standard “template” and is driven mostly by the photo sequence, and then I fill in info from the in-flight notes on the plogs, etc. During each trip I save up stuff like routes, wx data, etc.
Justine often does her notes on the places we visit but she hasn’t yet done that for this report.
I do these writeups to encourage pilots to go places.
Nice ATC just pretended to not hear me when I asked for a climb to FL150.
