Radar detector signal interpretation

[Pixie]

I wnder why it is that the sweet spot on almost every bike seems to be just fast enough to risk tickets.

It's because we have such a pathetically low Tax threshold (speed limit) compared to other countries

[Pixie]

Large Ag tractors have ground sensing radar fitted to them as a rule these days,I don't know what band, but they trigger a half strength alert on my Valeintine1 @ over 600m. The signal does not grow stronger as you close the gap however. So watch out for 'falses' from these machines now the new season is getting underway and you will see more of them on the roads.

This isn't a radar device.It's the Safety Warning System (SWS) transmitter that is used In the US.NZ police were offered it for free by the manufacturer,but felt that it's safety advantages were a lower priority than the fact that it would promote radar detector use (which receive the signals) and therefore reduce revenue.

[Lou Girardin]

111KPM in a 100KPM zone. Just me on a wet day down the Ruakaka/Waipu Straights. What can I say cop was having a bad day, so I cheered him up a bit

124KPM in a 100kpm zone (again). Yep, 80L backpack (yada, yada, yada). Bloody Ngatea Straights (which is why I travel by Matamata going to Tauranga).
Cop "You didn't slow down for me in a hurry"
Having seen him K's up the road but too late to do anything about it I replyed:
"Well I could see that you had me, so I felt there was not point in hurting myself by braking too hard just to stop for you"

The bike would have to be pretty gutless before I wouldn't get done for over the 100KPM, and I wouldn't want to ride it anyway

At 124 km per minute, I'd say you got off lightly. Where did you get the JATO packs to enable that sort of speed?

[RiderInBlack]

At 124 km per minute, I'd say you got off lightly. Where did you get the JATO packs to enable that sort of speed?

From the "Mr Fusion" unit I fitted after getting back from the future of course Bloody smartarse. I'm surprise you didn't ask where the 100KPM Zone was Edited it now.

[Morepower]

haha, the Tui's ad comes to mind.

You are right though, you have to have a visual on the car before confirming which vehicle is doing that speed... it is just helpful when the radar starts picking up speeds around a bend... you then have your "trigger" finger ready to lock on the speed when vehicle comes into view.

BC

Surely the laws of physics have not changed , a car coming at you from an angle would look substantialy slower to the radar than its actual speed due to the angle and the fact that radar works by working out the rate of closing distance. If a car showed as speeding it would need to be going pretty fast and the actual speed would depend on the angle of the bend. When I am bored I may drag out my old physics text books and work this one out.
But sure as eggs a good detector will have seen you too.

As for the false alarms , the uniden detectors will set off a sensitive bel or escort, sometimes from quite a distance, good detectors dont set each other off.

Also the older Valentines are not quite as sensitive as the old 980 bel and escort so do not seem to suffer the falsing from unidens.

Dave

[Lou Girardin]

That's called cosine error, and it works in the cops favour if he's in the bend and you're on the straight.
BTW falsing isn't a function of sensitivity, it's inadequate filtering in the gubbins. (another technical term)