Radar helps you see what's around you. An antenna mounted high above your boat (often on the mast of a sailing vessel) sends radar waves down towards the ground, hoping to pick up reflections of land or other boats below. It's not foolproof - it can often pick up images of waves instead of real objects - but it definitely helps you see what's around you, especially in conditions of poor visibility.

White - unpowered items that can't mass-lock the in-system drive (jumpdrive). Green/Yellow - navigation buoys. Yellow - powered craft. Red - powered craft identified as hostile. Green - space stations. Green/Red - thargoids. Purple - police. Blue/Red - police on intercept. Red/Yellow - active mine (about to detonate). Blue/Cyan - witchspace wormhole.

This is not required in any jurisdiction. Also, whether the officer allows you to see the speed reading has virtually no bearing on your case. Officers can lock on radar readings and leave them on to display to any hapless victim, even though it was not their vehicle that registered the displayed speed.

There may several reasons why a radar is not in operation but primarily will be due to either a part that has failed or it is just routine maintain. Check the Status reports page of the Dopper radar. These are messages describing the anticipated time the radar is to be out of service.

NEXRAD (Next Generation Radar) obtains weather information (precipitation and wind) based upon returned energy. The radar emits a burst of energy (green). If the energy strikes an object (rain drop, bug, bird, etc), the energy is scattered in all directions (blue). A small fraction of that scattered energy is directed back toward the radar. This reflected signal is then received by the radar during its listening period.

Photo radar is generally an unmanned device that identifies speeding vehicles using radar, and then takes a photo of the vehicle including the license plate. The violator later receives a ticket in the mail. Although photo radar is only used in a very few areas of the US, it is very common in some other countries overseas. Sometimes photo radar is weak, and aimed across the road so it is difficult to detect.

A radar detector is a small device that is mounted on the dashboard of a vehicle. Its purpose is to alert the driver to the presence of any police speed traps within the area. This allows the driver time to slow down before reaching the speed trap.

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In order to catch a driver speeding, there are various devices used by law enforcement, which emit various types of radio signals that enable them to calculate your speed. Radar/laser detectors are nifty bits of equipment that alert you (audibly or visually) to the presence of these devices by picking up the various signals emitted.

All of the newer radar detectors have a 5-band detection. These include the x band, which is an older band and is not widely used in the UK anymore. This is also the frequency on which most false alarms occur. The K band is used by GATSO cameras and most hand held guns. The ‘stalker’ guns use the Ka band, and finally, MiniGatso cameras in the UK use the Ku band. Whether and how they detect each band determines the price of the unit.

POP? Mode is a normal K or Ka band radar signal which travels from the radar gun to a target and back in less than a 1/10th of a second. Most radar detectors manufactured over 2 years ago and cordless radar detector models can not see this signal because it is just too fast. This technology is growing and many of the newer models do offer protection for this new technology.

RADAR audience estimates are based on a selection of more than 140,000+ diaries from the vast Arbitron diary base. Each diary covers seven days of radio listening, and the measurement is conducted over 48 weeks. Network station associations as of specific dates within the most current three-month period and clearances for two specific weeks are used to compile the network audience estimates.

Radar signal penetration is quite site specific due to signal absorption. In wet clay soils exploration may be limited to 1.5 metres or less. In dry sandy soils, exploration beyond 10 or 15 metres is possible.

The turbine structures will show up clearly on ship radars because not only will the structures themselves reflect the radar signal, but they will also be fitted with radar reflectors.

A series of diagnostic tests performed on police radar equipment to verify that the unit is functioning in accordance with the equipment manufacturer's specifications.