Maritime Tracking Surveillance Radar Essay

ASDIC gave no advance warning of a U-boat and thus there was no opportunity to reroute a convoy away from the danger. However, advances in technology meant that by 1942 the escorts would have several more means of detection. One such method was radar. By May 1942, 236 ships carried centimetric radar, an accurate radar using a wavelength of 10cm and able to detect a U-boat at a distance of several miles. This was important because it allowed convoys to make a course away the U-boat but more significantly it enabled escorts to home in and attack.

Activities associated to the Spectrum Efficient National Surveillance RADAR – Joint Program Office (SENSR JPO)

1.Controlling shipping piloted or non piloted inbound or outbound and ships bound to outer anchorage through radio to avoid collision & keep the channel clear.

Table.2 shown the best results of vertical resolution used in shorter pulse duration is better for the higher frequency and very similar for the 1 GHz, 800 MHz and 500 MHz. More which explains why the results obtained in Tables 3 was the same for both frequency. Because of the different materials used in the experiments metallic and wooden bars, the resolution show the metal bars are worsen, due to their higher electromagnetic contrast, amongst other things. The second reflector, so a bigger separation is needed to detect it as discrete events. This effect is more relevant when the reflectors are closer to the antennas and particular for the 500 MHz antenna (Table 3). The horizontal resolution obtained for the 1 GHz and 800 MHz is very similar and much better than for the 500 MHz. As expected, horizontal resolution worsens as the reflectors are moved away from the frequency, mainly because their footprint size gets larger. In radargrams (a) and (b) of Figs. 9, 11 and 13, the

Nainoa Thompson created the star compass, as the basis for direction finding in non-instrument navigation. The horizon is divided into 32 sections called "houses." Nainoa has placed

occasion to happen. This is giving the people the rundown of what is happening. It is a time log of the distance it is going, the course it is taking, the measurements of the torpedo going, and also the shots that were being fired. They keep records like us so when or something goes wrong they know actually where, when and why it happened. This clearly is a war zone now.

During this phase of the cycle a base of fire is established along with identifying the enemy capability. During this phase the object is to suppress the enemy for maneuver. As an example this is when a Marine may use a frag grenade to eliminate/shock/suppress the enemy position.

The mobile radar is driven into position in presence of storm that is being formed. As the storm is forming the radar is scanning the air. Dual polarization (dual-pol) radar was created by NOAA scientists that takes pictures that are two dimensional. This radar can do the because the radar sends out both horizontal and vertical electromagnetic waves. The dual-pol took around 20 years of development to complete.The dual-pol is used by the National-weather service to predict whether. Phased array radar scan the the sky for dangerous weather and see tornadoes within supercells and QLCS. The phased array radar also is used in the military to track aircrafts. QLCS stands for Quasi-linear Convection system. You could learn more about the QLCS in the next paragraph. The multifunction array radar is mostly used in the military to track aircrafts. All these radars are used to predict whether, but specifically tornadoes. Some sense the debris and some take two dimensional pictures. But all radars have one thing in common, all of them send out

SYS-002 The system shall able capable of detecting a vehicle travelling with high beams at a distance of 170 feet and send a warning signal on the control panel of vehicle.

My explore pt is GPS, gps is now very useful in our daily life, it is used to navigate, and in our modern life there are several types of GPS that be applied in many different ways like meteorological satellite, and of cause navigation satellite and so on

In aircrafts, it is difficult to see whether or not they are close to their targets due to the fact that they are in air moving. So with the tracer, it will increase

Apart from the 4 factors ship type, DWT, ship age and gears, there are a couple of other factors which affect the ship price. They are

In order to calculate shadow spacing, 1st we want the sun’s position within the sky on the winter solstice, december 21st. to get the minimum solar altitude angle $\alpha$, that is that the minimum angle the sun makes with the ground in your shade-free solar window (Fig. 3). For a 4 hour solar window, you wish to get the sun’s altitude angle at 10 AM or 2 PM on december 21st, because that is once the sun will be lowest within the sky. For a 5 hour window, you may want the sun’s altitude at 9:30 AM or 2:30 PM instead. after you notice this angle, you will possibly also be able to get the suns azimuth angle, $\psi$. this can be how faraway true south the sun’s position is (Fig. 4), and will be required to get the minimum allowable row

There are 24 satellites that circle the earth every 12 hours. These satellites are split into six groups of four and each group creates an orbital plane. These six orbital planes allow the satellites to move in a way that covers the earth completely. GPS satellites transmit signals to equipment on the ground. An example is a GPS receiver (GPS receiver can only receive the signals form the satellites but they can’t transmit any signals). The receivers work best in an open outdoor area where there is a clear view to the sky. At any time there are always four visible satellites. The GPS receiver can calculate how far each satellite is based on the time it took the signal to reach the receiver. Using the distance from each satellite that the receiver calculated it could then use a process called trilateration to pinpoint the location of the receiver [1].

RADARSAT-1 was a satellite launched by the Canadian Space Agency (CSA) in 1995 that incorporated a synthetic aperture radar (SAR) sensor operating in the C-band (frequency of 5.3 GHz). RADARSAT-1 stopped transmitting because of a technical problem in March 2013. The RADARSAT-1 images were ordered from the Alaska Satellite Facility website (www.asf.alaska.edu). The RADARSAT satellite was designed with seven SAR imaging beam modes. Each beam mode offers a different areal coverage (from ~50 km x 50 km/scene to ~500 km x 500 km/scene) and resolution (from 8 m to 100 m). The RADARSAT instrument also offers a range of incidence angles from 10° - 59° allowing us to choose from a selection of beam positions within each beam mode. RADARSAT-1