Note that at this time shown, the radar echo
from the second seeding line is still elevated above the level of this PPI scan and therefore only shows echo from the first of the two tracks.
Anagnostou et al., "The probability of hail in relation to radar echo
heights on the South African Highveld," Journal of Applied Meteorology, vol.
Due to processing radar echoes
in spatial frequency domain, this algorithm improves the calculation efficiency greatly.
Now, the simulation of wideband radar echo
of ballistic midcourse target with precession is mostly on the basis of ideal scattering centers, and the movement of these scattering centers is equaled to the precessional movement of the target.
We observed clear indications of passerine involvement from the radar echo
signatures of varying echo-strength typical of intermittent flight, a conclusion also supported by the low airspeeds measured in area C (cf.
Chu's findings led to the unexpected observation that applies even today: At frequencies even far off dipole resonance, the greater the length of a dipole compared to its diameter, or the narrower the dipole (length-to-diameter ratio), the greater the size of the radar echo
produced by a given weight of foil.
The PID may be in error if unusual or contaminated radar echoes
occur, but it is quite useful for identifying the general structure of convection.
The distribution and evolution of hourly precipitation were quite similar to that of radar echo
observations (Figure 6), suggesting that the corrected radar reflectivity assimilated by LAPS can provide optimal initial condition for numerical models.
Therefore, the space-domain steering vector a([theta], R) of OFDM radar echo
signal includes direction steering vector a([theta]) in (14) and distance steering vector a(R), that is,
The FAA determined the weather-affected area of the air traffic management unit according to the weather radar echo
and the 30-minute earlier short-term forecast to investigate the impact of inclement weather conditions on route network analysis in tactical air traffic flow management (ATFM) phase.
In fact, it triggers the waveform generator, that is, the DAC, to send a pulse train while, at the same time, it enables the acquisition window, in order to receive and convert the radar echo
(see Figure 7).