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GPS/INS kit on Pinaka MK 2 MLRS

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GPS Antenna: Increased application of Global Positioning Systems (GPS) for navigational aids, necessitated the development of low profile antennas. Two types of low profile antennas, viz., Wraparound Microstrip Antenna for Pinaka Rocket and Quadrifilar Helix Antenna for manpack GPS have been developed by DRDO. The development of GPS antenna for Pinaka, along with its feed network, is a challenging task as it requires antenna to be conformal with the cylindrical body of the rocket. Quadrifilar Helix Antenna is one of the preferred antennas for GPS application owing to its smaller size and cardioid pattern.


Specifications>>

Centre frequency : 1575.4 MHz
Bandwidth : � 3 MHz
Polarisation : RHCP
Gain : Better than 0 dB
VSWR : < 2:1
Radiation pattern : Hemispherical
Axial ratio : < 6 dB
 
DRDO


Antenna Systems


Antenna technology has gone through several changes commensurate with the evolution of the complex systems for various applications. DRDO has developed the capability in designing antennas for various ground-based and airborne radar systems, communication systems, electronic warfare, and underwater scenarios.


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GPS Antenna


Increased application of Global Positioning Systems (GPS) for navigational aids, necessitated the development of low profile antennas. Two types of low profile antennas, viz., Wraparound Microstrip Antenna for Pinaka Rocket and Quadrifilar Helix Antenna for manpack GPS have been developed by DRDO. The development of GPS antenna for Pinaka, along with its feed network, is a challenging task as it requires antenna to be conformal with the cylindrical body of the rocket. Quadrifilar Helix Antenna is one of the preferred antennas for GPS application owing to its smaller size and cardioid pattern.


antena8.jpg



Specifications


Centre frequency : 1575.4 MHz
Bandwidth : � 3 MHz
Polarisation : RHCP
Gain : Better than 0 dB
VSWR : < 2:1
Radiation pattern : Hemispherical
Axial ratio : < 6 dB
The antennas have been fabricated, tested and are undergoing field trials.


Squareax Planar Microstrip Patch Antenna Array


A planar microstrip patch antenna array of dimension 4.2 m x 1.1 m with a rectangular coaxial line (RCL) corporate feed network and a capacitively coupled microstrip patch has been designed and developed for Airborne Surveillance Platform programme. It comprises very low side lobes, broadband width, high gain and high power handling capability.


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Specifications


Frequency of operation : S Band
Bandwidth : 12 per cent
Polarisation : Vertical
Power Handling : 140 kW (peak), 7 kW (avg)
Gain : 34 dB
VSWR : < 1.8:1
Side lobes : < - 35 dB (azimuth)
< -30 dB (elevation)


Salient Features


  • RCL corporate feed network and probe fed capacitively coupled microstrip patch radiating element
  • Broad bandwidth, ultra low side lobes, high gain, high power handling capability, lightweight
  • Airborne Surveillance Radar application
  • Design can be extended to other frequency bands

The antenna has been fabricated, tested and found to meet all the required specifications. It has been designed so that the technology can be tailor made for any other similar application.


Quadraloop UHF Airborne Antenna


A quadraloop antenna with distinct airborne characteristics that makes it suitable for high-speed aircraft has been developed. It has been shaped for very low drag. The antenna can be used in a stand-alone mode or in an array environment depending upon the pattern requirement.


antena10.jpg



Specifications


Centre Frequency : 461 MHz
Bandwidth : � 5 MHz
Polarisation : Vertical
Gain : Better than 0 dB
VSWR : < 2:1
Radiation Pattern : Hemispherical
Weight : 85 gm
Dimension : 180 mm (L) x 18 mm (W) x 30 mm (H)


Salient Features


  • Airborne telemetry link application
  • Low drag, low profile, lightweight airborne antenna suitable for high speed aircraft
  • Fitted in various airborne platforms such as MiG 29, AVRO, HANSA aircraft for telemetry link
  • Design can be extended to other frequency bands

The antenna has been fabricated, tested and being used in the fighter aircraft of Indian Air Force.


Ku Band Antenna for High Resolution Radar


A lightweight, broadband planar antenna with an aperture size of 0.7 m x 0.4 m and a gain of 35 dB has been developed for UAV. To meet the gain requirement, dimension and weight, operating frequency of the antenna is in Ku band. Two approaches have been followed, viz., parabolic reflector and planar microstrip patch antenna.


Salient Features


  • Lightweight, Broadband
  • Fabricated with very high machining accuracy with surface finish of + 30 microns
  • Design can be extended to other frequency bands

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Specifications


Frequency of operation : Ku band
Bandwidth : 6 per cent
Beamwidth
Azimuth : 1.8o � 0.2 o
Elevation : 3.2 o � 0.2 o
Side lobe level
Azimuth : < -25 dB
Elevation : < -20 dB
Gain : 35 dB
VSWR : 1.8 : 1
Power handling : 300 W (peak)
Weight : < 5 kg


Antennas along with its back-up structure and feed mounting mechanism have been fabricated. The return loss measurement and its pattern test has been carried out and found to be meeting the requirement specified above.


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Similar Guidance - Disc type airbrake control on French SPADICO

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Improvement of the accuracy of artillery fire can also be achieved by the use of course correction techniques, implementing new braking mechanisms. Such an application is SPADICO fuse developed under a DGA program by GIAT, TDA Armament and IN-SNEC as an upgrade for in-service artillery shells. The system is built into the fuse and is composed of three discs air-brake and associated electronics. SPADICO designed to improve by x4 the hit accuracy, by adjusting the actual ballistic trajectory of the specific shell to match the theoretical trajectory which is used to compute the firing parameters.
 
Just one question. Pinaka is a rocket and i cant see any fins etc for steering (ofcourse rockets are not suppose to change course, altitude as system predominantly is fire and forget) but yes just stabilizer unit is there for stability . May i know whats the use of GPS/INS kit on Pinaka here?
 
And vane type control on Israeli IMI's TCS

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Just one question. Pinaka is a rocket and i cant see any fins etc for steering (ofcourse rockets are not suppose to change course, altitude as system predominantly is fire and forget) but yes just stabilizer unit is there for stability . May i know whats the use of GPS/INS kit on Pinaka here?


Honeywell adds precision to Indian-made Weapons
IANS | New Delhi October 6, 2014 Last Updated at 14:40 IST


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India will soon produce its first tactical weapons guidance device under licence from the US Honeywell.

The device, TALIN 2000 (or Tactical Advanced Land Inertial Navigator), can guide a weapon to hit a designated target with near-zero error, ensuring its precision destruction with minimal collateral damage.

The device can be installed for one-time use on bombs, missiles and rockets and gets destroyed in the explosive impact after leading the weapon to its target.

The chip, latest in its generation, can also be used on vehicles or person as it is small and wearable, company sources told India Strategic defence magazine.

Honeywell has signed an agreement with Tata Power SED to produce this sophisticated device, after clearance from the US government, and install it on systems like the Pinaka Multi Barrel Rocket Launcher (MBRL) and the Akash surface to air missiles, the two weapon systems the Tata Group is producing under licence from DRDO.

As of now, Tata Power will install the device on both these systems but its use can be multiplied as desired.

The agreement was signed Sep 29 on the sidelines of Prime Minister Narendra Modi's visit to Washington.

TALIN works without GPS and does not depend on any wireless signals. Its induction is expected to help increase troop safety and maximize mission success.

"TALIN represents the latest in GPS-free navigation and positioning technology, designed to improve asset safety and ultimately mission success," according to Arijit Ghosh, president of Honeywell Aerospace, India.

"By partnering with Tata Power SED on the production of TALIN, we are aligning with the government's aim of increasing locally manufactured technologies for India's defense industry and giving the Indian armed forces an easy-to-justify option for navigation on the 21st century battlefield," he said.

The value of precision weapons, or smart bombs, is great as precision means fewer shots and precise shooting of a designated target, which can either be a building, vehicle or a terrorist.

The Honeywell device can also be installed on artillery shells or many dumb bombs.

Says Honeywell: "TALIN is a highly accurate, shock-stabilized position and pointing inertial navigation system designed for use on a wide range of military and commercial platforms.

"It provides users with extremely precise attitude and position awareness with or without the use of GPS... TALIN is ideal for environments where GPS signals are unavailable.

"More than 15,000 systems from the TALIN family are currently operating on more than 60 military and commercial platforms worldwide."

India had been buying a similar device earlier from French weapons technology company Sagem.

Honeywell has been authorized by the US government to share this technology for manufacture in India but for use only by the Indian armed forces.

India is the second country after Germany to get this patented technology from the US.

DRDO head Avinash Chander has said that while DRDO had brought down the import content for Indian armed forces from some 70 percent to 50-55 percent in recent years, critical guidance and seeker technologies and sensors were still required from outside India.

The Pinaka Mk II has a range of 65 km, compared to 40 of Mk I, which had an error probability of one meter with the help of GPS.

But GPS signals can be distorted by the operator or jammed by an enemy.

Talin 2000 has an error probability of only a few inches, has its own mind, is low cost and high technology, and also one of the best possible battlefield navigation systems.

Said Rahul Chaudhry, CEO, Tata Power Strategic Engineering Division: "We are proud to have completed this technology sharing arrangement, which will offer the Indian armed forces a state-of-the-art inertial navigation technology, made in India and with local product support."

Honeywell will license the design, hardware and expertise to assemble, test and, in the future, build the production kits for TALIN to Tata Power SED.

The agreement will be extended to cover Honeywell's TALIN 3000, 4000 and 5000 products, which offer varying capabilities to suit a wide range of operational requirements.

Pinaka Mk 3 Will have a range of 120 ~ km
 
The Pinaka Mk II has a range of 65 km, compared to 40 of Mk I, which had an error probability of one meter with the help of GPS.
How? A lil explanation, of the fact that without steering fins how does Pinaka incorporates use of GPS for hitting target without bigger error margin, would be much better.
Thanks in advance.
 
Just one question. Pinaka is a rocket and i cant see any fins etc for steering (ofcourse rockets are not suppose to change course, altitude as system predominantly is fire and forget) but yes just stabilizer unit is there for stability . May i know whats the use of GPS/INS kit on Pinaka here?

Pinaka rockets does have tail fins.

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Pinaka rockets does have tail fins.
Sir what i read and saw in design diagrams were just stabilizing unit on baord each Pinaka which are non movable/non steering. So U mean to say that these fins are movable and not just stabilizers? If movable then why i cant find any flight computer or that sort of arrangement to process GPS signals to steer the fins on board Pinaka to hit target precisely.
 
Sir what i read and saw in design diagrams were just stabilizing unit on baord each Pinaka which are non movable/non steering. So U mean to say that these fins are movable and not just stabilizers? If movable then why i cant find any flight computer or that sort of arrangement to process GPS signals to steer the fins on board Pinaka to hit target precisely.

No, previous generation Pinakas were not guided, so the rotation of the rocket provided gyroscopic stability. But newer version of rockets have movable fins, and there's additional set of fins in the middle for the extended range ones.
 
WOW! Thanks DRDO for making these high end precision devices ? :lol:
 
Sir what i read and saw in design diagrams were just stabilizing unit on baord each Pinaka which are non movable/non steering. So U mean to say that these fins are movable and not just stabilizers? If movable then why i cant find any flight computer or that sort of arrangement to process GPS signals to steer the fins on board Pinaka to hit target precisely.

They were showing off moveable fins.

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