AIRPCC v1.0
Airborne Intercept Radar Pack for CY6s Command&Control mod v2
Old search cone
New search cone Microwave search cone
Meter wave search cone
I had the great honour to be allowed to take CY6s outstanding radar objects and build upon his achievements.
All credits for his original radars remain with Checkyersix, and since they worked flawlessy, any credits for bugs in these
refined ones go to sputnikshock.
A large amount of research has gone into these units. While they are by no means a physically correct simulation of
wave propagation or else, they still try to mimic the real radar sets as closely as possibly, yet in an inevitably simplified
manner. Now I am sure there are many experts with a specific knowledge and interest for any particular radar out there,
and they will for sure find parameters here and there that they feel unhappy with. Your corrections will be considered
for a future update - should there ever be one. For now, you have to live with this version. Oftentimes sources available
to the hobby researcher/modder are contradictory but given the time and resources available, I tried as hard as I could
to make it as realistc as possible.
sputnikshock
Airborne Intercept Radar Pack for C&C (AIRPCC) does not simulate airborne radar. It simulates a crew member who
operates and interpretes an airborne radar set. He is human, he can err, and he will.
The radio operator crews that AIRPCC provides are highly skilled and well trained. They will not make big mistakes,
however they will also never be perfect. You will be faced with a small, constantly varying amount of human error in all
radar contact reports. This, combined with a certain radars degree of accuracy, defines the precision and reliabilty of
the radar contact reports you will receive.
Your R/O will assist you in two different modes, approach/target finding and interception. He is well aware that you need
different information coming in at different rates in these different phases, and will act accordingly. When still far from
a target, he will provide information about where the target is, while when you close in to make an intercept he will tell
you where to steer!
For example: In target finding mode (long range), R/O tells you radar contact above us. By this he is referring to altitude.
In intercept mode (close range) he will tell you up a bit, but now he is referring to your aircrafts pitch attitude.
Furthermore, he will be giving these close range reports more frequently and in a shorthand form. You need info fast
now, and adrenalin levels are rising...
The two-mode system might sound complicated on paper, but you will quickly realize how helpful and natural it becomes
when you make your first intercepts with it. The exact nature of the reports given in both modes depends on the capabilities
and data display methods of the individual radar sets and is noted in the AI set data sheets further down.
Search cone geometry
The shape of radar search cones has been refined in AIRPCC.
In elevation, search cones are now circular sections instead of triangles. Thus maximum range is dependent on altiude
difference. While no changes were made to the already curved azimuth search geometry for microwave radars, meter
wave units now recreate the kidney shaped search cones which were characteristic of longwave equipment.
Maximum range is always given as the 0 azimuth, 0 elevation maximum detection distance.
Max. range =
altitude AGL
Below 7000ft
to 5000f AGL
Target is above fighter:
slight reduction in max. range
Target is below fighter:
max. range = 4 x fighter altitude
Ground interference
As a completely new feature, ground interference was added to AIRPCC airborne radars.
The way radar signals interact with the ground below is a completely different matter for longwave and shortwave radras
and needs to be looked at seperately.
For meter wave units, maximum detection range can never be greater than either the maximum range imposed by the
technical limitations of the radar set (which is given as max. range in the type data sheets further down) or the altitude
above ground level of the radar carrying aircraft - whichever is less!
If for example an aircraft flying at 2000m AGL with a radar set capable of detecting targets up to 5000m away, any radar
echo further then 2000m from the radar will be lost in ground clutter and thus not be detectable. Keep this in mind when
chasing radar contacts at lower altitudes. You will turn blind very quickly.
Microwave radars show a completely different behaviour. Their search beams are very narrow and are mechanically
rotated to cover a wider field of view. When this narrow beam hits the ground, it picks up radar returns from it. Also, due
to the nature of its short wavelength it suffers from atmospheric interference when below a certain threshold height. Both
these effects are taken into account in AIRPCC.
From somewhere between 7000ft - 5000ft AGL radar performance starts to deteriorate and will increasingly do so as
you go lower. For targets below the radar this effect is strongest and maximum range decreases to about four times the
radar carriers altitude. For targets above, performance loss is far less, and maximum range will gradually decrease to
reach around three-quarters at ground level.
Also, whenever you lower the aircrafts nose by an amount which allows the radar beam to scan the ground (this angle
obviously depends on radar range and your current altitude), you will suffer range penalties. If this happens while tracking
a target, your R/O will give a warning. How large that performance drop actually will be depends further on how much
of the radars search cone is affected by ground returns, that is by how much you pitch down.
Finally, for both meter wave and centimeter wave radars ground interference depends on the type of terrain. If flying
above water, and the sea is calm - that is, windspeed is low - you will be able to get much better low altitude performance
than above land or a rough sea.
AI radar sets quick reference and data sheets
Radar FMB name Search cone Range
Az Elev Min Max
FuG 202, FuG 212 FUG +-35 +-35 200m 3500m
FuG 220 SN-2 SN2 +-60 +-50 500m 4000m
FuG 220b,c,d SN-2 SN2b +-60 +-50 200m 4000m
FuG 218 Neptun FUG218 +-60 +-60 120m 5000m
Generic German tailwarning GTW +-30 +30,-45
Type 18 Mark 6 (FD-2) FD2 +-30 +-30 500m 3000m
AI Mk. IV, SCR-540 AImkIV +-70 +-20 350ft 3.5miles
AI Mk.VIII AImkVIII +-45 +-45 350ft 5.5miles
AI Mk.X, SCR-720 AImkX +-75 +40,-20 350ft 6.0miles
AI Mk.XV, ASH, AN/APS-4 AImkXV +-75 +-30 300ft 3.75miles
FuG 202 Lichtenstein BC, FuG 212 Lichtenstein C-1
Stationary object name: FUG
Minimum range: 200m
Max range...: 3500m
....at altitude: above 1000m AGL
Range accuracy: 100m
Range error: 10%
Azimuth: +-35
Azimuth accuracy (dead ahead/off-center): 5 / 10
Azimuth error: +-3
Elevation: +-35
Elevation accuracy (dead ahead/off-center): 5 / 10
Elevation error: +-3
Long-range/close-range reporting threshold: 1500m
Udapte frequency (LR/CR): 6 secs / 4 secs
Reporting format (LR/CR): Relative bearing, relative altitude, range / azimuth, elevation, range
Note: Due to its short wavelength, low altitude performance is exceptionally good for a longwave radar, with targets visible through
ground clutter down to around 1000m AGL.
FuG 220 Lichtenstein SN-2
Stationary object name: SN2
Minimum range: 500m
Max range...: 4000m
....at altitude: above 4000m AGL
Range accuracy: 100m
Range error: 10%
Azimuth: +-60
Azimuth accuracy (dead ahead/off-center): 5 / 10
Azimuth error: +-3
Elevation: +-50
Elevation accuracy (dead ahead/off-center): 5 / 10
Elevation error: +-3
Long-range/close-range reporting threshold: 1500m
Udapte frequency (LR/CR): 6 secs / 4 secs
Reporting format (LR/CR): Relative bearing, relative altitude, range / azimuth, elevation, range
Note: The FuG 220 suffered from insuffcient minimum range resolution when first introduced. It was therefore combined with a special
version of the Fug 212 to resolve this. Later, its circuitry was modified and the FuG 212 could be dropped. BOTH these solutions are
represented by the next unit, FuG 220b, c and d. The baseline unit was hardly used standalone but we kept it in the radar package
to provide downward compatibility with missions made for older versions of C&C.
FuG 220b, FuG 220c, FuG 220d Lichtenstein SN-2
Stationary object name: SN2b
Minimum range: 200m
Max range...: 4000m
....at altitude: above 4000m AGL
Range accuracy: 100m
Range error: 10%
Azimuth: +-60
Azimuth accuracy (dead ahead/off-center): 5 / 10
Azimuth error: +-3
Elevation: +-50
Elevation accuracy (dead ahead/off-center): 5 / 10
Elevation error: +-3
Long-range/close-range reporting threshold: 1500m
Udapte frequency (LR/CR): 6 secs / 4 secs
Reporting format (LR/CR): Relative bearing, relative altitude, range / azimuth, elevation, range
Note: FuG 220b included an additional FuG 212 for close range detection. FuG 220c had improved minimum range capabilities and
the FuG 212 was no longer needed. FuG 220d added rear warning. All three sets are represented by this object. In order to correctly
simulate the d variant it is recommended to combine it with the GTW object.
FuG 218 Neptun J3, FuG 218 Neptun V/R
Stationary object name: FUG218
Minimum range: 120m
Max range...: 5000m
....at altitude: above 5000m AGL
Range accuracy: 100m
Range error: 10%
Azimuth: +-60
Azimuth accuracy (dead ahead/off-center): 5 / 10
Azimuth error: +-3
Elevation: +-60
Elevation accuracy (dead ahead/off-center): 5 / 10
Elevation error: +-3
Long-range/close-range reporting threshold: 1500m
Udapte frequency (LR/CR): 6 secs / 4 secs
Reporting format (LR/CR): Relative bearing, relative altitude, range / azimuth, elevation, range
Note: FuG 218 J3 was a single-seat fighter AI set. FuG 218 V/R was for twin engined nightfighters, had Stag Antler antennas and
rear warning capabilities. To simulate the latter it is recommended to use it in combination with the GTW object.
Generic German Tailwarning
Stationary object name: GTW
Minimum range: 400m
Max range...: 4000m
....at altitude: above 4000m AGL
Range accuracy: 100m
Range error: 10%
Azimuth: +-30
Elevation: +30 to -45
Udapte frequency: 6 secs
Reporting format: Relative distance
Note: Reporting format is (distance in m). This is to be as unobtrusive as possible.
Type 18 Mark 6 (FD-2)
Stationary object name: FD2
Minimum range: 500m
Max range...: 3000m
....at altitude: above 1250m AGL
Range accuracy: 500m
Range error: 10%
Azimuth: +-30
Azimuth accuracy (dead ahead/off-center): 5 / 10
Azimuth error: +-3
Elevation: +-30
Elevation accuracy (dead ahead/off-center): 5 / 10
Elevation error: +-3
Long-range/close-range reporting threshold: 1500m
Udapte frequency (LR/CR): 7 secs / 5 secs
Reporting format (LR/CR): Relative bearing, relative altitude, range / azimuth, elevation, range
Note: Due to its short wavelength, low altitude performance is exceptionally good for a longwave radar, with targets visible through
ground clutter down to around 1000m AGL.
AI Mk.IV, SCR-540
Stationary object name: AImkIV
Minimum range: 350ft
Max range...: 3.5 miles
....at altitude: above 18500ft AGL
Range accuracy: 300ft
Range error: 10%
Azimuth: +-70
Azimuth accuracy (dead ahead/off-center): 5 / 10
Azimuth error: +-3
Elevation: +-20
Elevation accuracy (dead ahead/off-center): 5 / 10
Elevation error: +-3
Long-range/close-range reporting threshold: 1 mile
Udapte frequency (LR/CR): 6 secs / 4 secs
Reporting format (LR/CR): Relative bearing, relative altitude, range (miles) / azimuth, elevation, range (ft)
AI Mk.VIII
Stationary object name: AImkVIII
Minimum range: 350ft
Max range...: 5.5 miles dead ahead, drops gradually to 2.5 miles at +-45 az or elev
....at altitude: above 6500ft AGL
Range accuracy: 300ft
Range error: 5%
Azimuth: +-45
Azimuth accuracy (dead ahead/off-center): 1 / 10
Azimuth error: +-1
Elevation: +-45
Elevation accuracy (dead ahead/off-center): 1 / 10
Elevation error: +-1
Long-range/close-range reporting threshold: 1 mile
Udapte frequency (LR/CR): 6 secs / 3 secs
Reporting format (LR/CR): Magnetic bearing, relative altitude, range (miles) / azimuth, elevation, range (ft)
Note: Very accurate and responsive when target is dead ahead. Severe range and accuracy penalties if target is off center.
AI Mk.X, SCR-720
Stationary object name: AImkX
Minimum range: 350ft
Max range...: 6 miles
....at altitude: above 7000ft AGL
Range accuracy: 300ft
Range error: 5%
Azimuth: +-75
Azimuth accuracy (dead ahead/off-center): 5 / 5
Azimuth error: +-3
Elevation: +40 to -20 long range / +40 to -5 short range*
Elevation accuracy (dead ahead/off-center): 5 / 5
Elevation error: +-3
Long-range/close-range reporting threshold: 1 mile
Udapte frequency (LR/CR): 8 secs / 4.6 secs
Reporting format (LR/CR): Mag. bearing, relative altitude, range (miles), track / azimuth, elevation, range (ft)
Note: AI Mk.X CRTs had afterglow and allowed the R/O to give a target track estimate. The additional amount of information and the
fact that elevation had to be inquired on a target by target basis leads to longer reporting intervals in long range mode. In short range
mode, R/O will reduce the scanning angle and trade field of view for faster radar updates.
AI Mk.XV, ASH, AN/APS-4
Stationary object name: AImkXV
Minimum range: 300ft
Max range...: 3.75 miles
....at altitude: above 5000ft AGL
Range accuracy: 300ft
Range error: 5%
Azimuth: +-75
Azimuth accuracy (dead ahead/off-center): 5 / 10
Azimuth error: +-3
Elevation: +-12
Elevation accuracy (dead ahead/off-center): 3 / 3
Elevation error: +-3
Long-range/close-range reporting threshold: 1 mile
Udapte frequency (LR/CR): 6 secs / 4 secs
Reporting format (LR/CR): Magnetic bearing, relative altitude, range (miles) / azimuth, elevation, range (ft)
Requirements
- Il-2, of course
- a modactivated install of it, like SAS Modact, UP or DBW
- CY6s Command & Control Mod version 2
Installation
- Unzip and move files into your +0000_CY6_Command_and_Control folder. Overwrite existing files!
(But backup first)
- Add this line to the [StationaryObjects] section of your stationary.ini:
FD2 vehicles.stationary.FD2$FD2Unit 0
- It is also recommended (but not necessary) to change these lines in your stationary.ini:
FUG vehicles.stationary.FUG$FUGUnit 2
to
FUG vehicles.stationary.FUG$FUGUnit 0
SN2 vehicles.stationary.SN2$SN2Unit 2
to
SN2 vehicles.stationary.SN2$SN2Unit 0
SN2b vehicles.stationary.SN2b$SN2bUnit 2
to
SN2b vehicles.stationary.SN2b$SN2bUnit 0
FUG218 vehicles.stationary.FUG218$FUG218Unit 2
to
FUG218 vehicles.stationary.FUG218$FUG218Unit 0
GTW vehicles.stationary.GTW$GTWUnit 2
to
GTW vehicles.stationary.GTW$GTWUnit 0
AImkIV vehicles.stationary.AImkIV$AImkIVUnit 1
to
AImkIV vehicles.stationary.AImkIV$AImkIVUnit 0
AImkVIII vehicles.stationary.AImkVIII$AImkVIIIUnit 1
to
AImkVIII vehicles.stationary.AImkVIII$AImkVIIIUnit 0
AImkX vehicles.stationary.AImkX$AImkXUnit 1
to
AImkX vehicles.stationary.AImkX$AImkXUnit 0
AImkXV vehicles.stationary.AImkXV$AImkXVUnit 1
to
AImkXV vehicles.stationary.AImkXV$AImkXVUnit 0
How to use
- Place anywhere on the map in FMB.
- It is not recommended to use more than one airborne radar object per mission. They can be combined with other
electronic warfare or C&C v2 GCI objects though.
- Airborne radars will only track targets that are NOT the color of the object itself (ie, Red objects will track blue tagets),
regardless of the players color. They are by default assigned to army none (white). This means they will report any
targets within range. If youd like to simulate IFF, just assign your airborne radar object to your own armys color.
- German radars will report in meters, while Allied radars will report in miles and feet.
- The R/O will report the nearest contact within the radars cone, even if there are multiple targets available. This is to
help the player home in on specific contacts.
Credits
Checkyersix for the original radar objects
Sputnikshock for AIRPCC
Slipper for ideas and testing
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