- 27 December 2005
- Reaction score
Thread for Su-24 Avionics discussion
This can be explained by the fact that the FON and KLEN(laser range finder/designator) were developed by the UOMZ compared to the CKB Geofizika which manufactured the LTvPS KAIRA. In my understanding the KAIRA on the Mig-27K included the laser range finder and the laser designator slaved with the TV(vidikon type) target recognizing system. Note also the KAIRA was able to track the target in the back hemispere what enabled to drop laser guided bombs. This probably needed to install apertures separately, the upper one for laser range finder and lower for laser designator. Even the newer "single aperture" KLEN-PM(PS for Sukhois) was not able of looking backward, therefore the Mig-27M was limited to use laser guided missiles only.Tompa said:What puzzles me about the MiG-27K optronics suite is that the upper aperture looks alot like the homing head of the H-29T (I know it's not really a technical description ;D), and not at all similar to Fon or Klen apertures...
PaulMM (Overscan) said:
Various models of this station were installed on other front-line bombers - MiG-23BK, MiG-27K.
Su-24MK (commercial) differs from Su-24M only in state identification equipment
Tasks of LTPS "Kaira-24":
- recognition of ground moving and stationary targets;
- laser illumination of ground targets for homing missiles with laser homing heads (GOS);
- automatic tracking of a ground target with stabilization of the line of sight;
- measurement of sighting angles in the coordinate system (SC) associated with the aircraft;
- issuance of target designations to the GOS.
Technical characteristics of LTPS "Kaira-24":
- max range - 7 km;
- min range - 3 km;
- angles of inclination of the line of sight:
* in the vertical plane - from 0 ° to minus 160 °;
* in the horizontal plane ± 35 °;
- maximum angular velocity () of the line of sight - 40 arc. deg / sec;
- maximum tracking error with the correlator - 5 arc. min for a cycle time of 30 sec;
- the radiation wavelength of the optical quantum generator (laser) - 1.06 microns;
- duration of a laser pulse at a level of 0.5 - (30 - 150) ns;
- divergence of the laser beam - no more than 5 ang. min;
- radiation energy in a pulse - (0.14 - 0.3) J;
- pulse power - no more than 5 MW;
- the maximum operating time of the laser is 2 minutes, with cyclic operation with an interval between pulses - not less than 15 seconds, with the number of cycles - not more than 8;
- sighting system weight - 160 kg.
The composition of the LTPS "Kaira-24":
- TV channel;
- sighting unit;
- electronics unit;
- communication unit.
The assembly of all units (except for the communication unit) on the structural frame is called the backlight station .
LTPS "Kaira-24" operates in the following functional modes:
- software-corrected tracking (PCS);
- automatically corrected tracking (AKS);
- autonomous correction (AK).
The main means of contactless obtaining of information about the target (s) is a television channel , the equipment of which converts an optical signal in the visible range of radiation (0.38 - 0.78 μm), received from the "space of objects" under its natural illumination (passive location).
For example, in the homing head (GOS) of an onboard missile, information about the target is obtained using optoelectronic means that convert the optical signal (in the near-infrared range of 1.06 μm) received from the target when it is illuminated by the radiation of an optical quantum generator (LQG) , i.e. when using the principles of active location.
In this case, the main parameters of the observation and non-contact measurement means are the angular dimensions of the field of view of the sensing element (vidicon) of the television channel and the angular direction in the space of the optical axis of the television channel or, in other words, the angular direction of the sighting axis (VO) characterizing the zero point of the coordinate system (SC ) of the angular direction meter on the target image (direction finder).
In the above functional modes, the technical means of the Kaira-24 LTPS are connected to each other in various structures, which are aimed at implementing the functions performed by the Kaira-24 LTPS in solving the entire complex of combat tasks of the Su-24MK front-line fighter-bomber.