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[Real Beam Ground] Map - Real Beam Ground Map (RBGM) provides the
conventional air-to-ground radar functions of large area mapping, large
discrete target tracking, and general navigation. Its range scales 5 NM
to 160 NM with azimuth scan angles up to +60o.
DI's FA18E
Sea Surface Search - Sea Surface Search (SSS) is an extension of RBGM
optimized for operation over water. It scans a large area to locate and
acquire ships in cluttered seas. Range scales and azimuth sectors are
similar to RBGM except that automatic thresholding produces a
clutter-free display.
Ground Moving Target [Indication] - Ground Moving Target Indication
(GMTI) detects moving ground targets. GMTI normally functions as an
activity indicator and as an aid in cueing sensor pods. In normal
operation GMTI targets are alternately overlaid on the RBGM display on a
frame-to-frame basis. It has range scales out to 40 NM and azimuth scan
angles up to +45o.
Jane's F/A 18
Doppler Beam Sharpening (EXP1) - Doppler Beam Sharpening (DBS) provides
high resolution air-to-ground mapping. DBS Expand 1 improves azimuth
angular resolution 19:1 with ground coverage over a 1.25 NM square
patch. This mode enables rapid detection of tactical targets and
provides much more finely detailed mapping than the GMTI overlay on
RBGM. The tradeoff is a much smaller area of mapping.
Click to continue
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MISCELLANEOUS MODES
Radar Elevation Up/Down - This refers to the potential articulation of
your radar antenna, and hence scan, up/down in relation to the
longitudinal axis of the aircraft. The "Band" in which your radar
traverses may be elevated/decremented. This Band is delineated as
"Bars" through which your radar scans and are indicated by 2B, 4B, and
6B.
A 6B setting will scan a much taller vertical range of airspace with
each horizontal cycle, but at the expense of update duration (less
current information). To further comprehend this principle keep in mind
that the radar scans left-right/top-bottom to fully annunciate on the
DDI, much as a TV set's electron gun passes across the phosphor coating
to fill the picture tube.
Radar Azimuth Left/Right - Much like Radar Elevation but applied to the
horizontal scanning capability of the radar. A 6B setting will scan a
much wider horizontal range of airspace with each cycle. Again as
Elevation, the tradeoff is timeliness of update for a larger volume of
scanned airspace. At great distance to bogie this is probably a good
investment, but close-in you need the fastest scan possible to properly
evaluate the threat.
Terrain Avoidance - Terrain Avoidance is used for all-weather
low-altitude penetration and navigation. Hornet v3.0 does not fully
model this capability however it is "built in" to autopilot when at very
low altitude and utilizing Radar Altimeter.
By the way, use of radar
altimeter will not negate a 'stealthy' approach as it is a pulse device
directed straight down from the belly of the aircraft. Only when banked
at, or greater than, 90 degrees would it come into play as a detectable
emission, but the interval is so short and randomly radiated that it is
negligible to your tactical planning.
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