I am writing to convey my profound appreciation for the outstanding guidance that Dr Atsushi Okazaki and Professor Shunji Kotsuki gave me while I was employed at the Centre for Environmental Remote Sensing, Chiba University, in the Environmental Prediction Science Laboratory. I have found that Dr. Okazaki's instructions, advice, tolerance, and support have been extremely helpful in overcoming the obstacles I have faced at work. I am grateful to Dr. Okazaki for his time and effort in mentoring me in developing within the academic community. I am thankful for the chance to work in the top research laboratory in the world. I want to express my gratitude to every lab member for their thoughtful support. With genuine gratitude. (Gaurav Tiwari)