The problem Rakshak Drone solves

Primarily this drone will help in maintaining the guidelines of Covid 19 by ensuring proper sanitization in public places. Outdoor drones will be deployed to disinfect hospital buildings, benches, car parking areas, and public community spaces, while smaller indoor drones installed with portable UVC lights, can disinfect indoor surfaces of hospitals and other public buildings.
Depending on the disinfection requirement, each drone will carry a different payload required to achieve maximum efficiency.
Real-time monitoring from the control center is enabled by a video camera and streaming system installed on the drones. Colour zone-mapping from the cameras builds the timeline view of disinfected areas.

Challenges we ran into

Proper PID tuning of attitude and position controller.
Got many bugs during the development of the PID algorithm
We encounter many common errors and bugs in ros during the development of drone, so learnt to debug it.
Proper selection and analysis of the dataset
Building the logic for the computer vision model
Learning about the different control system concepts related to the drone simulation
Got the knowledgeregarding drone aerodynamics and physics