WIPO IPC: Internet Publication
... several of the classes in this section, in particular those of "measuring" in class G01 and "control" and "regulation" in class G05. Classification in this section may present more difficulty than in other sections, because the distinction between different fields of use rests to a considerable exte ...
... several of the classes in this section, in particular those of "measuring" in class G01 and "control" and "regulation" in class G05. Classification in this section may present more difficulty than in other sections, because the distinction between different fields of use rests to a considerable exte ...
Antenna Theory - The Free Information Society
... 1. General. An antenna is the component of a radio system that is used to send or receive a radio signal. A radio frequency (RF) signal that has been generated in a radio transmitter travels through a transmission line (coaxial cable) to an antenna. An antenna connected to a transmitter is the devi ...
... 1. General. An antenna is the component of a radio system that is used to send or receive a radio signal. A radio frequency (RF) signal that has been generated in a radio transmitter travels through a transmission line (coaxial cable) to an antenna. An antenna connected to a transmitter is the devi ...
Design and experiments on series fed conformal
... Conformal antenna arrays fitted to the surface of a non planar part of a modern aircrafts, vehicles or ships are considered an attractive alternative for certain applications where planar arrays or reflector antennas have definite drawbacks. Some of the potential advantages are improved aerodynamics ...
... Conformal antenna arrays fitted to the surface of a non planar part of a modern aircrafts, vehicles or ships are considered an attractive alternative for certain applications where planar arrays or reflector antennas have definite drawbacks. Some of the potential advantages are improved aerodynamics ...
lecture-7.antenna
... frequency control, frequency stability, spectral purity, power level, and modulation. • The receiving system could be as simple as a bolometer detector, followed possibly by an amplifier, and a recorder. More elaborate and expensive receiving systems that provide greater sensitivity, precision, and ...
... frequency control, frequency stability, spectral purity, power level, and modulation. • The receiving system could be as simple as a bolometer detector, followed possibly by an amplifier, and a recorder. More elaborate and expensive receiving systems that provide greater sensitivity, precision, and ...
Basics on Radar Cross Section Reduction Measurements of Simple
... R is the distance between radar and target; d is the largest dimension of the target; and is the wavelength of the radar. This condition ensures good measurements. Errors produced by the instrumentation should neither exceed 0.5 dB nor vary in time in order to avoid instability in the measurement of ...
... R is the distance between radar and target; d is the largest dimension of the target; and is the wavelength of the radar. This condition ensures good measurements. Errors produced by the instrumentation should neither exceed 0.5 dB nor vary in time in order to avoid instability in the measurement of ...
Simulation of 3D Laser Radar Systems
... operate them such that A < 1. The value of d is large because the instantaneous field of view of a detector is several times larger than the diffraction-limited angle. Therefore, many speckles in the reflected intensity pattern fall within the receiving telescope. For Jigsaw, d/A is of order 104, an ...
... operate them such that A < 1. The value of d is large because the instantaneous field of view of a detector is several times larger than the diffraction-limited angle. Therefore, many speckles in the reflected intensity pattern fall within the receiving telescope. For Jigsaw, d/A is of order 104, an ...
- Sacramento
... Hong described using radar along with machine learning for fall detection. The radar used was a stationary Continuous Wave Doppler radar. Hong recognized that the percentage of senior citizens would double by the year 2050, and in Japan, there is a large percentage of seniors living alone. This popu ...
... Hong described using radar along with machine learning for fall detection. The radar used was a stationary Continuous Wave Doppler radar. Hong recognized that the percentage of senior citizens would double by the year 2050, and in Japan, there is a large percentage of seniors living alone. This popu ...
6.013 Electromagnetics and Applications, Chapter 11
... at least some energy at all frequencies; the sharper the pulse edges, the more high-frequency content they have. Therefore, reducing the sharp discontinuities in field strength at the aperture edge, a strategy called tapering, can reduce diffraction sidelobes. Antenna feeds are typically designed to ...
... at least some energy at all frequencies; the sharper the pulse edges, the more high-frequency content they have. Therefore, reducing the sharp discontinuities in field strength at the aperture edge, a strategy called tapering, can reduce diffraction sidelobes. Antenna feeds are typically designed to ...
localization - Columbia CS
... nij can be reduced by repeated observations Nij cannot because it is caused by persistent features of the environment, such as detection of a reflection. ...
... nij can be reduced by repeated observations Nij cannot because it is caused by persistent features of the environment, such as detection of a reflection. ...
Chapter 1 Time Interval Measurement Literature Review
... The transmitted pulses from the level measurement instrument are electromagnetic waves and are travelling at close to the speed of light. Since these pulses only have to travel a very short distance to the target medium (a maximum of 20m there and back), the time interval (TI) between the transmitte ...
... The transmitted pulses from the level measurement instrument are electromagnetic waves and are travelling at close to the speed of light. Since these pulses only have to travel a very short distance to the target medium (a maximum of 20m there and back), the time interval (TI) between the transmitte ...
ert 245:geomatic engineering remote sensing: energy sources
... Remote sensing is the science of acquiring information ...
... Remote sensing is the science of acquiring information ...
2(10)_Ishihara
... the system due to surface ozone at 47918. An airfilter was installed stop the inflow of ozone from the outside, and then the problem was resolved. An unmanned hydrogen generator will be used at 47909 from 2007. ...
... the system due to surface ozone at 47918. An airfilter was installed stop the inflow of ozone from the outside, and then the problem was resolved. An unmanned hydrogen generator will be used at 47909 from 2007. ...
GEOG3051_13 - UCL Department of Geography
... This course builds on the 2nd year module GEOG2021 and will provide an introduction to the concepts and principles of remote sensing in both the optical and microwave domains. The module will provide an introduction to the concepts and principles of remote sensing in both the optical and microwave d ...
... This course builds on the 2nd year module GEOG2021 and will provide an introduction to the concepts and principles of remote sensing in both the optical and microwave domains. The module will provide an introduction to the concepts and principles of remote sensing in both the optical and microwave d ...
Optimization of satellite insar techniques for monitoring of
... Interferometry is a technique that currently allows to measure even sub-centimeter terrain changes on nearly any part of the world. Range of radar wavelengths used in spaceborne SAR instruments is approximately between 3 – 30 cm (disregarding missions that are not concerned in a solid terrain monito ...
... Interferometry is a technique that currently allows to measure even sub-centimeter terrain changes on nearly any part of the world. Range of radar wavelengths used in spaceborne SAR instruments is approximately between 3 – 30 cm (disregarding missions that are not concerned in a solid terrain monito ...
PULSE MODULATION
... Because in case of Natural PAM, the varying top signal is when received at receiver, it becomes quite difficult to determine shape of top of pulse due to noise (which is always present). Thus errors are introduced in the receiving signals due to wich we prefer a flat top PAM. ...
... Because in case of Natural PAM, the varying top signal is when received at receiver, it becomes quite difficult to determine shape of top of pulse due to noise (which is always present). Thus errors are introduced in the receiving signals due to wich we prefer a flat top PAM. ...
Application of Space-Based Remote Sensing to Climate
... to Climate Change & Disaster Relief High Level Segment ITU Council 2008 November 13, 2008 Badri Younes Deputy Associate Administrator for Space Communications & Navigation National Aeronautics and Space Administration United States of America ...
... to Climate Change & Disaster Relief High Level Segment ITU Council 2008 November 13, 2008 Badri Younes Deputy Associate Administrator for Space Communications & Navigation National Aeronautics and Space Administration United States of America ...
LOW-ANGLE BEAM RIDING OVER THE OCEAN
... the autopilot, the wing servomechanism, and the aerodynamic response. Ideally the missile computer accepts the error signal and computes the magnitude of the missile acceleration required to null the error. The autopilot accepts the computed acceleration command and determines the necessary wing def ...
... the autopilot, the wing servomechanism, and the aerodynamic response. Ideally the missile computer accepts the error signal and computes the magnitude of the missile acceleration required to null the error. The autopilot accepts the computed acceleration command and determines the necessary wing def ...
Data Sheet
... To protect two cranes: one crane uses an A-unit and one crane uses a B-unit. A- and B-units each consists of an active antenna and a relay box. The antenna sends a Microwave signal to the opposite unit. By using SFCW (Stepped Frequency Continuous Wave) radar, the distance and relative speed are calc ...
... To protect two cranes: one crane uses an A-unit and one crane uses a B-unit. A- and B-units each consists of an active antenna and a relay box. The antenna sends a Microwave signal to the opposite unit. By using SFCW (Stepped Frequency Continuous Wave) radar, the distance and relative speed are calc ...
Dispersion in Optical Fibers
... this equation implies that at the point of zero dispersion, λD , where β̈ = 0 the group velocity, vg as a function of ω has a minimum (the derivative is zero). For wavelengths λ < λD , β̈ > 0 and the fiber is said to exhibit normal dispersion. In this regime (dvg /dω) < 0, which means high-frequency ...
... this equation implies that at the point of zero dispersion, λD , where β̈ = 0 the group velocity, vg as a function of ω has a minimum (the derivative is zero). For wavelengths λ < λD , β̈ > 0 and the fiber is said to exhibit normal dispersion. In this regime (dvg /dω) < 0, which means high-frequency ...
Appendix B: Decibel Arithmetic
... Perhaps the most important of them all is that utilizing dBs drastically reduces the dynamic range that a designer or a user has to use. For example, an incoming radar signal may be as weak as 0.000000001V , which can be expressed in dBs as 10 log ( 0.000000001 ) = – 90dB . Alternatively, a target m ...
... Perhaps the most important of them all is that utilizing dBs drastically reduces the dynamic range that a designer or a user has to use. For example, an incoming radar signal may be as weak as 0.000000001V , which can be expressed in dBs as 10 log ( 0.000000001 ) = – 90dB . Alternatively, a target m ...
PWS-SCI
... 1. to continue the exploratory actions on automatic present weather observations 2. R&D activities to obtain more appropriate in situ observing technologies based on an integral concept of a set of observation technologies (using algorithms) should be further traced and stimulated. 3. Centers of R&D ...
... 1. to continue the exploratory actions on automatic present weather observations 2. R&D activities to obtain more appropriate in situ observing technologies based on an integral concept of a set of observation technologies (using algorithms) should be further traced and stimulated. 3. Centers of R&D ...
Theory - glaciers.pdx.edu
... platform is moving and the target is stationary. The area of the earth that is illuminated by the SAR sensor is a series of teardrop-shaped footprints. Surface features enter the illumination area, and in each successive pulse, move through it and exit with the features further from the sensor being ...
... platform is moving and the target is stationary. The area of the earth that is illuminated by the SAR sensor is a series of teardrop-shaped footprints. Surface features enter the illumination area, and in each successive pulse, move through it and exit with the features further from the sensor being ...
RADAR AND TELEVISION ENGINEERING No.1(i)why flicker is not
... No(.2) Write the vertical sync and blanking pulse standard. Ans. A vertical sync waveform is inserted in the composite video signal at the end of each field of 312.5 lines .Each vertical sync consist of (a)pre-equalizing pulses(b)field sync pulses and (c) Field Blanking Period (VB): During this peri ...
... No(.2) Write the vertical sync and blanking pulse standard. Ans. A vertical sync waveform is inserted in the composite video signal at the end of each field of 312.5 lines .Each vertical sync consist of (a)pre-equalizing pulses(b)field sync pulses and (c) Field Blanking Period (VB): During this peri ...
Pulse-Doppler radar
A pulse-Doppler radar is a radar system that determines the range to a target using pulse-timing techniques, and uses the Doppler effect of the returned signal to determine the target object's velocity. It combines the features of pulse radars and continuous-wave radars, which were formerly separate due to the complexity of the electronics.Pulse-Doppler systems were first widely used on fighter aircraft starting in the 1960s. Earlier radars had used pulse-timing in order to determine range and the angle of the antenna (or similar means) to determine the bearing. However, this only worked when the radar antenna was not pointed down; in that case the reflection off the ground overwhelmed any returns from other objects. As the ground moves at the same speed but opposite direction of the aircraft, Doppler techniques allow the ground return to be filtered out, revealing aircraft and vehicles. This gives pulse-Doppler radars ""look-down/shoot-down"" capability. A secondary advantage in military radar is to reduce the transmitted power while achieving acceptable performance for improved safety of stealthy radar.Pulse-Doppler techniques also find widespread use in meteorological radars, allowing the radar to determine wind speed from the velocity of any precipitation in the air. Pulse-Doppler radar is also the basis of synthetic aperture radar used in radar astronomy, remote sensing and mapping. In air traffic control, they are used for discriminating aircraft from clutter. Besides the above conventional surveillance applications, pulse-Doppler radar has been successfully applied in healthcare, such as fall risk assessment and fall detection, for nursing or clinical purposes.