Geez dude... lay off and learn something. Speed, wavelength, period, and frequency are all related and all vary together with any wave, whether that wave be in the infrared range as in LIDAR or the radio range as in radio. And in the right industries, light is referred to almost exclusively in frequencies and wavelengths, such as telecom and fiberoptics.

The only essential difference between LIDAR and RADAR (besides being in different bandwidths of the EM spectrum) is that RADAR detects the doppler effect and LIDAR detects velocity. RADAR calculates velocity by the difference in frequency of the returning beam compared to the transmitted beam. LIDAR sends pulses and times their return to get a distance calculation and calculates speed based on the distance travelled in a given time.
-N

 

Yes, you are correct. I have worked on the worlds most advanced shipboard radar (Phased Array, 360 degree spy 1-D Aegis system).

Yes, police radar does work on the Doppler Shift Effect.

I don't care, but the guy that told me to go back to high school really pissed me off. I know quite a bit more about this stuff then the average Jo. I did study radar fundamentals for 2 years ya know!

 

So there is no x-radar in cali? cause I hate all the false alarms and will turn it off.

 

Frequency = (speed of light) / (wavelength)

Of course, normal light isn't normally reported in frequency, but wavelength or wavenumbers. That's probably what you meant. But radio waves are a form of light, the wavelengths are just so much bigger. (Frequencies are smaller)

 

i do believe that phase array is still in TESTING we don't even use it in weather yet... Yes i'm a weatherman!

 

I hate to tell you this, but Phased Array has been in use since the 50's man. It was first used in the Navy on the USS Long Beach, and the USS Enterprise.

AN-SPY1-BD 360 degree air search radar is a VERY ADVANCED early warning radar. It is the heart of Locheed Martin's AEGIS Weapons System. It uses an electronicaly steered beam.

I am an Aegis Fire Controlman in the Navy. This stuff is what puts bread on my table. There are no moving parts, and a sweep is completed and processed in fractions of a second.

Yes, I am a radar technician!

 

Doppler shift radar uses CWI, or continious wave illumination. The same lobe is utilized in missile fire control directors.

 

um... well dohh!!!!! anyway atleast we don't use it in weather yet!

 

You twit. You'd be equally hardpressed to find anyone measuring radio frequencies who works in terms of cycles-per-second, either. Instead, everyone uses convenient units. The radio guy uses KHz, MHz or GHz (instead of Hz), and the near-infrared and visible light guy uses THz (terahertz).

Back on topic, I've noticed that my laser detector seems to go off sometimes because someone ahead of me (usually in an SUV) has one of those new red LED-type high mounted center brake lights and he hits his brakes. Laser detectors are designed to look for radiation with a frequency of 332 THz (or a wavelength of 904 nm, whichever floats your boat), which is what a laser gun like the LTI UltraLyte emits. Visible red light is generally defined as the frequency region from 482 THz all the way down to 390 THz. So there's not very much separation in frequency (what's 58 THz among friends) and it seems possible to me that these new LED taillights might be radiating significant power (perhaps as an harmonic) at the Laser gun's center frequency. Alternatively, laser detectors might be extremely wideband. For instance, they might be designed to allow for the detection of aluminum gallium arsenide (AlGaAs) based lasers, which are used in fiber optics and emit at a frequency of 353 THz, much closer to visible red.

 

"Captains Log, startdate 08242003, our 'Phased Array' banks have been corrupted by the Klingons currently circling Uranus. Our only hope is to open a portal to the 50's and regain this technology... before it's too late".

 

What the heck was I doing missing earth science....