120
5 Performance Characteristics of Radar Location …
Fig. 5.28 Influence of
indicator units parameters on
resolution capability of radar
location systems (rectangular
scanning)
For the second, at selection of screen size and indicator type, it is necessary to
create conditions permitting to maximally enlarge image scale in range and angular
coordinates and in some cases in Doppler frequencies.
In modern radars, a target indication on display is usually appeared after special
processing of radar data. For instance, a special target blip is forming. In these
conditions, the limiting factor is possibility to observe a minimum image element
(feature).
5.5 Bandwidth Capacity of Radar Location and Radio
Navigation Systems
The radar location and radio navigation systems bandwidth capacity is one of the
most important tactical characteristics and is relevant for systems with interrogation
and response channels.
Response channel capacity is determined by a maximum number of responders
which an interrogator can simultaneously successfully operate with. Limiting of
response channel capacity is carried out due to of its saturation, when a number of
responders increases to an extent that normal operation of responder is disrupted.
Such mode for the most radars and RNS is not common since in each response
channel, as a rule, one responder operates (e.g., aerial vehicle usually operates with
one ground-based radio beacon (RB).
Interrogation channel capacity is determined by a maximum number of interrogators, which can simultaneously successfully operate this responder. Limiting of interrogation channel capacity is carried out due to decrease of responses which is given
by this responder to each interrogator. A number of responses reduces as a responder
locking device switches off a receiver on safety time t s after each response. By this
5 Performance Characteristics of Radar Location …
Fig. 5.28 Influence of
indicator units parameters on
resolution capability of radar
location systems (rectangular
scanning)
For the second, at selection of screen size and indicator type, it is necessary to
create conditions permitting to maximally enlarge image scale in range and angular
coordinates and in some cases in Doppler frequencies.
In modern radars, a target indication on display is usually appeared after special
processing of radar data. For instance, a special target blip is forming. In these
conditions, the limiting factor is possibility to observe a minimum image element
(feature).
5.5 Bandwidth Capacity of Radar Location and Radio
Navigation Systems
The radar location and radio navigation systems bandwidth capacity is one of the
most important tactical characteristics and is relevant for systems with interrogation
and response channels.
Response channel capacity is determined by a maximum number of responders
which an interrogator can simultaneously successfully operate with. Limiting of
response channel capacity is carried out due to of its saturation, when a number of
responders increases to an extent that normal operation of responder is disrupted.
Such mode for the most radars and RNS is not common since in each response
channel, as a rule, one responder operates (e.g., aerial vehicle usually operates with
one ground-based radio beacon (RB).
Interrogation channel capacity is determined by a maximum number of interrogators, which can simultaneously successfully operate this responder. Limiting of interrogation channel capacity is carried out due to decrease of responses which is given
by this responder to each interrogator. A number of responses reduces as a responder
locking device switches off a receiver on safety time t s after each response. By this