Signal report
404 page not found, no return
The sensor is working. The address you asked for is inside this site's nominal range and is not observed from where you are standing, which is the definition of dead ground and the subject of most of this reference.
- Address requested
- /…
- Returns
- 0
- Sensor status
- nominal
- Cause
- terrain, not equipment
- Recommended action
- move
Fig. 404Where your address is
- inside the observed arc
- inside the range, never seen
Three ways back onto observed groundPick one
01 The glossary Thirty-two terms. If you arrived chasing one word, it is probably here, defined the way the documents use it. 02 The contents index Every page on the site in one list. The blunt instrument, and the one that always works. 03 Start again at the front The five sections, what each one answers, and where to go first if you have no particular question yet.
Followed a link from elsewhere? It may point at an address from the earlier site here. Those are redirected where an equivalent page exists — if this one should have been, tell us. A wrong link is the one kind of dead ground we can actually close.