Varoon Shekhar wrote:
What was the GPS technology or device that India developed earlier this year, and what is its significance? Can someone please restate the achievement. Thanks!
In September 2012 it was announced that Accord software have developed a very low power electronic module called G3
OM weighing 17 gm that could receive G
LONASS and G
AGAN signals. Broadsword: Satellite navigation breakthrough for aircraft and weapons
This module can be combined with an inertial navigation system (INS), probably a ring laser gyro INS [RINS]
, as shown in the figure below obtained from a paper published in Coordinates magazine titled INS-GPS-GLONASS navigation fusion scheme for high dynamics guided projectiles
by two Research Center Imarat scientists, G, Satheesh Reddy and Manjit Kumar.
The paper above was published in August 2012 and support for GAGAN is shown as "(in Future)". The very next month the G3
OM was announced as including support for GAGAN.
As stated in the paper in the form of 2 examples which leveraged INS, GPS and GLONASS but not GAGAN:
As analyzed, where the INS is aided by single (GPS/GLO) constellation, the position error of Hybrid Navigation is driven down to less than 15m (1-σ) after about 50 sec, whereas the position error of combined aided GPS-GLONASS constellations is better than 7m (1-σ) after 50 sec as shown in figure 5. It has been observed that for weak GPS constellation the concurrent healthy GLONASS measurements provides better accuracy, high redundancy and more reliable combined GG solution. This also results in improved GDOP and Hybrid Navigation Performance. Further the Real Time Simulation studies are carried to analyze the performance of this scheme for High Velocity Projectile applications.
The scheme has been simulated for medium range guided Projectile and post simulation results were analyzed as shown in fig 7 & fig 8. The Projectile travelled with forward velocity 800m/s and beyond covers the short (< 100 Km) to medium down range (< 250 Km) in the flight time of 371 sec. As it’s analyzed, the Vehicle in the entire Thrust Phase and beyond is guided through either by GPS or GG aided Navigation by correcting all the propagated Navigation errors in all phases, which resulted in achieving the desired accuracy for Hybrid Navigation (< 25 m, 1-σ) of the Vehicle as shown in fig 8.
Apart from military uses, BusinessLine notes
The modular receiver is useful in aircrafts, helicopters, mobile vehicles, boats, ships and survey applications. The component fabricated by the Bangalore-based, Accord Software & Systems company also has civilian use and can be produced in large numbers at a low cost.
G. Satheesh Reddy was promoted to Outstanding Scientist in September 2011. Quoting Tarmak007
His technological achievements, eminence and innovative applications of engineering gave him the rare distinction to pick up this rare honor at the age of 48 years. He was earlier conferred with DRDO Scientist of the Year Award in 2010 and also the Fellowship of Indian National Academy of Engineering Fellowship (FNAE).
He then went on to win the Systems Society of India VIKRAM Award "in recognition of his outstanding leadership towards realizing Systems of National importance", also quoting Tarmak007