JULY 2010: The thought of terrorist attacks in Mumbai on Nov. 26, 2008 still sends chills down our spines. Be it the attack on a city that never sleeps or the daily battle fought by our soldiers on snow-capped mountains at the line of control (LoC), every terror attack throws up harder challenges for the armed forces, making the urge for a watchful eye stronger.
Netra, the unmanned aerial vehicle (UAV), which is like a small eye zooming in the sky, can gather real-time intelligence on the ground and become the perfect weapon to outsmart terror elements. Developed by ideaForge, a start-up company incubated at IIT Bombay, it is a completely autonomous system controlled by a ground-control software application with an intuitive graphical user interface.
“Netra is a completely autonomous system for surveillance and reconnaissance requiring no prior flying experience for an operator. The operator just needs to point and click on the satellite map displayed in the software application for navigation. It keeps sending live video to the ground control station, helping the users (defence personnel, etc) plan their moves based on the aerial video data received,” says Ankit Mehta, managing director, ideaForge. It can help in monitoring counter-terrorist operations, insurgency in forested areas, hostage situations and border infiltration besides conducting local law enforcement operations, search-and-rescue operations, disaster management, etc.
Eye in the Sky!
With many UAVs developed and tested in the past to address our defence needs, what makes Netra a cut above the rest? Netra outsmarts other UAVs in the market with features like vertical take-off and landing, which result in greater operability, BlueFire Autopilot, which is the smallest and lightest autopilot, and fail-safe modes, wherein the UAV automatically returns to the base in case of low battery or communication loss.
High operability. Netra has set new yardsticks in terms of operability. It can vertically take off and land, allowing it to be operated from confined areas and even rooftops.
“The on-board GPS keeps updating the current position of the vehicle. It stores the take-off GPS position that can act as the landing spot too and be changed in flight, if required. Once it is commanded to land, it decides its path and reaches the landing spot. Then it lands vertically down,” says Mehta.
Netra is well-equipped to withstand harsh conditions like wind and poor visibility. “We have studied wind effects on the vehicle and done a lot of aerodynamic design changes for improved wind resistance,” says Mehta. Further, it can be operated at night and soon even indoors.
“The thermal camera option allows Netra to operate at night, in fog or any other kind of poor visibility condition. Since the vehicle is completely autonomous, the user need not worry about the navigation issues in such conditions,” says Mehta.
Smart auto pilot. The level of autonomy in Netra is higher than in any other UAV as it allows hands-free operation after the operator commands the vehicle to go to a specified destination. “The software displays maps (satellite imagery from Google maps) around the current location of the vehicle along with trajectory of the moving vehicle. For navigation, the user just needs to mark a way-point on the map. Double-clicking the point will command the vehicle to start moving towards that point,” says Mehta.
The BlueFire Autopilot, which is the brain of Netra, takes on thereafter. The autopilot controller takes over the tasks of take-off and navigation as per the flight plan, at every instance providing the corrections and auto stabilising the platform due to inherent motion and wind gusts. This flight plan can be dynamically changed during flight, providing high levels of autonomy to the operator.
“The intelligent autopilot communicates with the ground station, gathers data from all the sensors, stabilises the vehicle and navigates it. It has been developed in-house by ideaForge and is world’s smallest and lightest autopilot available promising to relieve the operator from skilful manoeuvring,” says Mehta. Further, built-in intelligence of the controller allows failsafe operation in case of communication failure with base station or low battery.
Foolproof safety plan. Netra can fly for half an hour on a single battery charge, thanks to use of high-quality Li-Po batteries having the highest energy density (energy/weight ratio). Even if the battery gives way, Netra has several levels of fail-safe modes like low-battery fail-safe and communication-loss fail-safe. In the case of low battery, the UAV automatically comes back and lands by itself. During a communication failure between the vehicle and ground control station, Netra starts coming back and when it regains communication, it hovers and waits for the next command.