Penguin
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From: HongQi 7 (HQ-7, FM-80, FM-90) Surface-to-Air Missile System - SinoDefence.com
For the FM-90 the radar detection range is 25km i.e. that's the range of the shipmounted firecontrol radar, not the missile. Interestingly a radar homing range is mentions. This is peculiar since the guidance is command to line of sight CLOS (i.e. there is no radar homing involved in missile guidance). The way I would read the above info is that the FM-90 missile has a max engagement range of 20km, and this would be against larger targets e.g. an aircraft rather than - say - against a smaller arget like a seaskimming antiship missile. As for engaging 3 target simultenaneously with different guidance modes, there is only a single missile firecontrol radarstation on deck (which also mounts the el-op components. So, unless a separate ELOP ball mount was added, I suppose this then means three missiles can be controlled. i.e. 1 under CLOS with radar or ELOP (actual engagement) and 1-2 kept 'in flight' (intertial navigation).The export version FM-80 was first revealed in the 1989 Dubai Aerospace Show. Later in 1998 China National Precision Machinery Import and Export Corporation (CNPMIEC) introduced an improved variant FM-90 featuring fast and longer-range missile and infrared camera to compliment the TC tracking camera.
Compared to the original system, the improvements on the FM-90 include:
-Using VLSI technology-based computer (designed by 706 Institute) to replace the original LSI technology-based S-9 computer on the HongQi 7/FM-80.
-Using digital electronic technology to replace the original analogue design, increasing the missile's abilities against active/passive jamming.
-Using a new two-waveband tracking radar to replace the original monopulse radar
-An infrared camera was added to the TV tracking system so that the optical tracking system can be used at night.
-Target information between search and firing units is transmitted via a datalink pole system similar to that fitted on the later production Thomson-CSF Crotale 4000.
-Re-designed missile warhead fusing system
In addition, the missile's seeking/homing range, maximum speed, and attack range all have been improved, which greatly increases its combat effectiveness. With a maximum detecting range of 25km, the FM-90 is capable of attacking three targets using three different guidance modes simultaneously. The missile also has anti-missile ability against ultra-low-altitude cruise missiles, air-to-surface missiles, and anti-radiation missiles at a distance of 17km.
Guidance: Command + electro-optical tracking
Radar detecting range: (HQ-7/FM-80) 18.4km; (FM-90) 25km
Radar homing range: (HQ-7/FM-80) 17km; (FM-90) 20km