slant range


Also found in: Dictionary, Wikipedia.

slant range

[′slant ‚rānj]
(navigation)

slant range

The line-of-sight distance between two points not at the same elevation.

slant range

i. The line-of-sight distance between two points not at the same altitude or level relative to a specific datum.
ii. The actual distance between a ground-based radar and an airborne target. The range indicated by the radar is the slant range.
iii. The actual distance between an aircraft and a ground radio facility. This distance is more than the horizontal distance. A DME (distance-measuring equipment) indicator shows the slant-range distance. Also called a slant line.
References in periodicals archive ?
Doppler frequency can be obtained through derivation of slant range and is expressed as
Parameters Value Carrier frequency 5.3 GHz Antenna length 6 m System PRF 2149 Hz Pulse duration 1 [micro]s Pulse bandwidth 100 MHz SAR velocity 7000 m/s Squint angle 30[degrees] Slant range of imaged center 300 km Table 2.
The bistatic slant range at time instant tm can be obtained as
According to the geometry, the instantaneous slant range r(t, [R.sub.0]) of P is as (1), in which t is the slow time.
In (4), the reference channel is channel 1; that is, the reference slant range is [R.sub.1,1]([eta]) = [square root of ([R.sup.2.sub.0] + [V.sup.2.sub.r][[eta].sup.2])].
[r.sub.0]: Shortest slant range of the target to the antenna.
[R.sub.min] is the minimum slant range between SAR and jammer.
where L represents the length of azimuth antenna, and r represents slant range.
PARAMETERS Value Carrier frequency 9.65 GHz Orbit height 514.8 km Satellite velocity 7608 m/s Pulse duration 20 [micro]s The transmit time delay 30 [micro]s Signal bandwidth 30 MHz Sampling frequency 50 MHz Transmit antenna length 2.8m Receive antenna length 2.4 m*3 Transmit antenna height 0.176m Receive antenna height 0.44 m*4 Look angle (subswath 1) 34.5[degrees] ~ 41.5[degrees] Look angle (subswath 2) 20.0[degrees] ~ 31.3[degrees] Slant range (subswath 1) 637.06 km ~ 710.60 km Slant range (subswath 2) 550.80 km ~ 611.76 km
From Figure 1, instantaneous slant range equation between platform and target is given as
The system geometric structure and slant range model are analyzed in second section, the analytical frequency spectrum is obtained in third section, the improved NCS algorithm is derived in forth section and the simulation results and performance evaluation are shown in fifth section.
The slant range of the moving receiver with respect to P(x, y) is: