CLGM: Cannon Launched Guided Missile

[Twinblade]

Re: CLGM Tests Successful

Cannon Launched guided missile.

 

[Abhi9]

Re: CLGM Tests Successful

DRDO's CLGM Development Programme Appears To Be Progressing Well - AA Me, IN

he Pune-based DRDO lab, Armament Research & Development Establishment [ARDE] has initiated a tendering process to award a contract for supplying the Guidance system used in its Cannon-launched Laser Guided Missile [CLGM], presently under Cannon-Launched-Guided-Missile-CLGM-Indiadevelopment. The Indian company eventually chosen would have to provide 30 units of the system, that it would need to build in conformance with the design drawings, manufacturing process & quality standards provided to it by the concerned DRDO lab.

The tender for limited-scale manufacturing of this critical sub-system suggests that its developers have acquired a fair level of confidence with their design, not foreseeing the need for substantial re-design in the future, & are ready to take things forward. Once the final design is locked, large-scale production would be taken up by one of the designated DPSUs. Additionally, news of the postponement of an impending test wasn't followed up with the news of any test having take place subsequently. Could suggest faults were detected pre-flight, they went back to the drawing boards, & are now ready with corrected designs. The CLGM had tested success earlier in the year.

This assessment, if true either way, bodes well for the country's missile inventory. The 5 km range CLGM can target armoured vehicles, including Tanks, as well as low-flying aircrafts. It can be fired, both, from the barrel of the indigenous Arjun MBT, thus enhancing that platform's versatility, as well as a standalone system, that can be lugged around by soldiers. India's other indigenous Anti-Tank Guided Missile [ATGM], the Nag, on the other hand, is incompatible with the Arjun Tank, & is much too heavy to function as a man portable anti-tank system. News reports indicate intention to develop a lighter version of the Nag, although no trial launches have taken place, so far. Therefore, to plug in this gap in the arsenal, India intends to import the Israeli LAHAT missiles to kit its presently missile-nude Arjun. In addition, it is also contemplating whether to go for the American Javelin or the Israeli Spike missiles to replace its inventory of older man portable ATGMs. A smooth, preferably accelerated, development of the CLGM could lessen the number of the above mentioned missiles that are to be imported. The CLGM would also enjoy an advantage over the LAHAT in terms of its Guidance System used. While the latter employs a solely laser designated targeting system, the Indian solution is to have both direct/indirect laser designation, as well as heat seeking terminal guidance capability.

 

[Phantom]

Re: CLGM Tests Sucessful

Warhead is heavy as per our requirement, plus it can be launched from cannon.

LAHAT too can be fired from a cannon, isn't it? Recently when some problems with smoke inside the cabin was reported during Arjun Mk II firing trials, wasn't the LAHAT one among the cannon-fired projectiles?

 

[arnabmit]

Indigenous Seeker Technology

Let's discuss Indigenous seeker technology which has been developed by PSUs.

So far as we know, PSUs have already developed the following technologies:

• Retransmission Seeker (Akash Mk1)
• IIR (NAG)
• X Band SAR Radar Seeker (Astra/AAD/PAD)
• Laser seeker (PGMs/CLGM/SAMHO)
• MMW Active Radar Seeker Seeker (HELINA)
• SatNav (G3OP)
• Laser Gyro INS

In the process of development:

• Electro-Optical Seeker (QRSAM)
• Anti-Radiation seeker (ARM)
• Ku-Band Seeker (Astra Mk2)

Technologies which are imported/developed under JV:

• Multi-spectral active radar seeker (Barak 8)
• X Band Imaging & Monopulse Seeker (BrahMos)

 

[Apollyon]

Re: Indigenous Seeker Technology

Add to this:

• IIR Seeker (PDV)

 

[Hari Sud]

Re: Indigenous Seeker Technology

For a layman, please educate me on what is a seeker, what does it do, where is it fitted in the missile and what different kind seekers are there. My knowledge is limited to knowing that it works in the terminal phase and leads missile to its target.

At the same time please evaluate Indian seekers now with DRDO and how reliable these are.

 

[power_monger]

Re: Indigenous Seeker Technology

Is it G3OP or G3OM? G3OM - is not a seeker but a parallel system to Seeker technology. G3OM augments the signals from GPS, GLONASS, GAGAN on a Module and guides the missile towards the target.

Advantage of G3OM

- Indigneious, a first of its kind in world developed by RCI hyderabad and produced by Accord software company in Bangalore,tested for first time in world on brahmos.
- Helps in Miniaturizing missiles as seekers consume lot of space whereas G3OM weighs just 17 gms and require few cm of the space
- Cost of missile gets reduced, seeker is a high tech device which cost nearly 40% of the missile cost
- As the weight of missile reduced,range and speed automatically increases thereby increasing effeciency
- Accuracy if below 5 ms.

Disadvantages

- GPS signals tend to be weak and can be easily jammed although there are steps to avoid. if Signals are jammed,the missiles will be completly rendered useless.
- we do not have access to military grade signals of GPS and GLONASS. Chinese by having ASAT capability can easily target GAGAN satellites.Although it will be impossible for us to get military grade signals from GPS,talks are going on to get military grade signals from glonass which are difficult to jam than normal signals.
- Currently its not tested completly and still in its Nascent Stage

 

[Shaitan]

Re: Indigenous Seeker Technology

MMW seeker for HELINA

IRDE Developed IIR Seeker Assembly Section for NAG ATGM

Nag ATGMs LWIR IIR seeker

VEM Technologies-Built IIR Seeker Assemblies for NAG ATGM

VEM Technologies-Built Laser Seeker for CLGM

 

[Shaitan]

Re: Indigenous Seeker Technology

VEM Technologies-Built RF Seekers for BMD Interceptors

Ku-Band ARSEEK for PAD & AAD

Seeker for BrahMos-1 by Data Pattern Pvt Ltd

Seeker for BrahMos-1 by -Alpha Technologies Pvt Ltd

Microstrip Patch-Array Antenna for Nirbhay Multi-Role Cruise Missile

 

[arnabmit]

Re: Indigenous Seeker Technology

VEM Technologies-Built Laser Seeker for CLGM

 

[Shaitan]

Re: Indigenous Seeker Technology

Seeker for BrahMos-1 by Data Pattern Pvt Ltd

 

[Shaitan]

Re: Indigenous Seeker Technology

 

[arnabmit]

Re: Indigenous Seeker Technology

@Defcon 1 I saw a few old threads where you has asked why SAMHO & MP-NAG are being developed simultaneously since both have the same role.

Yes, both are ATGMs, or rather families of Precision Guided Munitions. However, one is Laser guided (CLGM/SAMHO), other is Imaging Infrared guided.

IIR guided missiles are more suitable for LOBL (Lock on before launch)
Laser guided missiles are more suitable for LOAL (Lock on after launch)

Apart from that, there are other benefits as well for each.

IIR missile can seek out targets even through fog, rain, dust, etc. but suffers failure at extended ranges, cluttered target background and extreme hot ambient temperatures.
Laser missile is very inefficient to seek out targets through fog, rain, dust, etc. but succeeds at extended ranges, cluttered target background and extreme hot ambient temperatures.

 

[arnabmit]

Re: Indigenous Seeker Technology

Browse Wiki and read up!

Here is a link to get you started: https://en.wikipedia.org/wiki/Missile_guidance

For a layman, please educate me on what is a seeker, what does it do, where is it fitted in the missile and what different kind seekers are there. My knowledge is limited to knowing that it works in the terminal phase and leads missile to its target.

At the same time please evaluate Indian seekers now with DRDO and how reliable these are.

 

[power_monger]

Re: Indigenous Seeker Technology

can we also know difference between a normal RF seeker and a millimetric wave seeker?

 

[arnabmit]

Re: Indigenous Seeker Technology

There is nothing called a "normal" RF Seeker. Seekers confirm to any of the following bands depending on range, resolution and power requirement.

Barak-8 (LRSAM/MRSAM) uses multi-band seekers.

As per IEEE standards:

HF : 3 to 30 MHz
VHF : 30 to 300 MHz
C : 500–1000 MHz
UHF : 300 MHz to 3 GHz
S : 2–4 GHz
X : 8–12 GHz
Ku : 12-18 GHz
K : 20–40 GHz
Ka : 26.5–40 GHz
L : 40–60 GHz
V : 40–75 GHz
W : 75–110 GHz
mm : 30 to 300 GHz

can we also know difference between a normal RF seeker and a millimetric wave seeker?

 

[power_monger]

Re: Indigenous Seeker Technology

There is nothing called a "normal" RF Seeker. Seekers confirm to any of the following bands depending on range, resolution and power requirement.

Barak-8 (LRSAM/MRSAM) uses multi-band seekers.

As per IEEE standards:

HF : 3 to 30 MHz
VHF : 30 to 300 MHz
C : 500–1000 MHz
UHF : 300 MHz to 3 GHz
S : 2–4 GHz
X : 8–12 GHz
Ku : 12-18 GHz
K : 20–40 GHz
Ka : 26.5–40 GHz
L : 40–60 GHz
V : 40–75 GHz
W : 75–110 GHz
mm : 30 to 300 GHz

it would be helpfull if you can give advantages of using seekers of above band.

 

[arnabmit]

Re: Indigenous Seeker Technology

it would be helpfull if you can give advantages of using seekers of above band.

Lower frequency = Higher range, lower accuracy, lower power consumption, negligible influence by weather conditions. Lower frequencies are mainly used for long range transmit and broadcast.
Eg 1: ITU ELF (Frequency range: 3 to 30 Hz; Wavelength range: 100,000 to 10,000 km) used for communication between land and submerged submarines far away
Eg 2: IEEE L Band (Frequency range: 1–2 GHz; Wavelength range: 3–1.5 dm) used for air volume search aboard ships like Thales LW-08 on INS Kolkata

Higher frequency = Lower range, higher accuracy, higher power consumption, highly influenced by weather conditions. Higher frequencies are mainly used for short range pin point locating.
Eg 1: IEEE Ku Band (Frequency range: 12-18 GHz; Wavelength range: 2.5–1.67 cm) used for target acquisition for missiles like Astra
Eg 1: IEEE mmW (Frequency range: 30 to 300 GHz; Wavelength range: 1cm to 1mm) used for target acquisition for missiles like HELINA

 

[arnabmit]

Re: Indigenous Seeker Technology

Sorry, I mixed up a few IEEE standards with ITU or NATO standards.

Here is the correct list:
HF : 3 to 30 MHz
VHF : 30 to 300 MHz
UHF : 300 MHz to 1 GHz
L : 1–2 GHz
S : 2–4 GHz
C : 4–8 GHz
X : 8–12 GHz
Ku : 12-18 GHz
K : 18–27 GHz
Ka : 26.5–40 GHz
V : 40–75 GHz
W : 75–110 GHz
mm : 110 to 300 GHz

There is nothing called a "normal" RF Seeker. Seekers confirm to any of the following bands depending on range, resolution and power requirement.

Barak-8 (LRSAM/MRSAM) uses multi-band seekers.

As per IEEE standards:

HF : 3 to 30 MHz
VHF : 30 to 300 MHz
C : 500–1000 MHz
UHF : 300 MHz to 3 GHz
S : 2–4 GHz
X : 8–12 GHz
Ku : 12-18 GHz
K : 20–40 GHz
Ka : 26.5–40 GHz
L : 40–60 GHz
V : 40–75 GHz
W : 75–110 GHz
mm : 30 to 300 GHz

 

[arnabmit]

Re: Indigenous Seeker Technology

Saurav Jha's Blog : Seeking the future: An interview with Dr G Satheesh Reddy, Director Research Centre Imarat

So, mmW seeker for HELINA is dropped. Instead it would use MEMS FOG (indigenous), plus G3OM for initial navigation, and 6-7km range IIR for terminal homing.

mmW seeker would now be used instead for Active ARM and PGMs.

To look out for:
1> Dual colour IIR
2> PGMs in the likeness of Brimstone or Vikhr
3> Conventional MIRV carried by SRBMs for saturation attack on HVTs
4> New Gen Active Anti-Radiation Missile

I do hope the PGM being developed is a dual mode stand-off one, using a front looking mmW seeker and a much cheeper and more effective rear looking Laser detector (as in the Vikhr)