Question: IIT Kanpur Airport has a service for which company's helicopters, based out of the Juhu Aerodrome?

Context paragraphs:
Kanpur Airport: Kanpur Airport (IATA: KNU, ICAO: VICX) or Ganesh Shanker Vidhyarthi Airport is an airport that was originally designated for the Indian Air Force.  In the 1970s, flights operated from this airport regularly to Delhi, Ahmedabad, Allahabad, Kolkata, Bangalore, Chennai, Pune and Mumbai.  The Civil Air Terminal of Kanpur Airport was re-opened in December 2004 and since then flights have been operational on this airport off and on.  Currently, there are flights from this airport.

IIT Kanpur Airport: IIT Kanpur Airport, also called Kalyanpur Airport, is located at Kalyanpur near Kanpur, India.  It is used by the Aerospace Engineering department of IIT Kanpur.  Pawan Hans began a helicopter ferry service to Lucknow from June 2013, making IIT Kanpur the first academic institution to have such a facility.

Kendriya Vidyalaya IIT Kanpur: Kendriya Vidyalaya IIT Kanpur is a school situated in the IIT Kanpur campus, Kanpur, Uttar Pradesh.  It was established in the year 1965 and is part of the Kendriya Vidyalaya system of schools.  It has classes from I to XII.

Tarun Kant: Tarun Kant, an institute chair professor at the Indian Institute of Technology Bombay (IIT Bombay) in Mumbai since December 2009, was born on 1 July 1946 in Ballia, Uttar Pradesh, India.  He received a BSc degree from Allahabad University in 1962, a B.Tech (Hons.)  degree in civil engineering from IIT Bombay in 1967 and an M.Tech in civil engineering, specializing in structural engineering, from the Indian Institute of Technology Kanpur (IIT Kanpur) in 1969.  Kant spent about 18 months at a consulting engineering firm in Mumbai before becoming a lecturer at IIT Bombay in January 1971.  He received a PhD degree in 1977.  Kant became an assistant professor in 1978 and a professor in 1986.  At IIT Bombay, he has been a department head (2000–2002), dean of planning (2001–2003) and chair of the Joint Entrance Examination (1998) and the Central Library (1995–1999).

Entrepreneurship Cell, IIT Kanpur: Entrepreneurship Cell, IIT Kanpur (E-Cell) is the primary student body of IIT Kanpur that promotes entrepreneurship among students across the country.

Pawan Hans: Pawan Hans Limited is a helicopter service company based in New Delhi, India.  Pawan Hans is a Mini Ratna-I category PSU.  It has cumulatively flown more than 1 million hours and has had 2.5 million landings on its fleet since its formation.  The operations are based at the Juhu Aerodrome in Vile Parle (West), Mumbai.  Other than providing helicopter services to ONGC to its off-shore locations, this public sector company is often engaged for providing services to various state governments in India, particularly in North-east India, Inter-island ferry services in Andaman & Nicobar Islands, for last 26 years service to Lakshdweep Administration in ferrying people from Islands to Kochi Intl airport and inter-island services.  These are considered as backbone of Lakshadweep and Minicoy Islands which are far flung from Indian shores extending up to 400–500 km into Arabian sea, Vaishno Devi Helicopter service for devotees.  Service to BSF and Maharashtra Police for Medical and Logistics support in event of maoist attack on troops.  Rohini Heliport owned by Pawan Hans, was inaugurated by Union Civil Aviation Minister, Ashok Gajapathi Raju on February 28, 2017.  The heliport, located north west of New Delhi, is the first of its kind in the country.

WX notation: WX notation is a transliteration scheme for representing Indian languages in ASCII.  This scheme originated at IIT Kanpur for computational processing of Indian languages, and is widely used among the natural language processing (NLP) community in India.  The notation (though unidentified) is used, for example, in a textbook on NLP from IIT Kanpur.  The salient features of this transliteration scheme are: Every consonant and every vowel has a single mapping into Roman.  Hence it is a prefix code, advantageous from computation point of view.  Typically the small case letters are used for un-aspirated consonants and short vowels while the capital case letters are used for aspirated consonants and long vowels.  While the retroflexed voiceless and voiced consonants are mapped to 't, T, d and D', the dentals are mapped to 'w, W, x and X'.  Hence the name of the scheme "WX", referring to the idiosyncratic mapping.  Ubuntu Linux provides a keyboard support for WX notation.

Juhu Aerodrome: Juhu Aerodrome (ICAO: VAJJ) is located in Juhu, an upmarket residential suburb of Mumbai, India.  It is used by small General Aviation aircraft and helicopters.  Founded in 1928 as India's first civil aviation airport, Juhu served as the city's primary airport during and up to World War II.  In 1948, commercial operations were moved to the much larger RAF Santacruz which was built 2 km east of Juhu aerodrome during the war.  In 1932, JRD Tata landed at the Juhu aerodrome, inaugurating India's first scheduled commercial mail service.

Ritambhara: Ritambhara (Hindi: ऋतंभरा ) is the fashion carnival of Antaragni, the annual cultural fest of the Indian Institute of Technology Kanpur held in the month of October.  It is a three-day-long event, attracting participation from more than 100 colleges across the country.  Ritambhara has witnessed judges like Nawazuddin Siddiqui, Kunal Kapoor, Kanika Kapur, Noyonita Lodh, Shilpa Singh.  Started in 1964, by a group of enthusiastic IITians,Ritambhara,now in its 52nd edition serves as a platform for designers and models alike to showcase their talents and skills through several themed competitive events.It is a non-profit event run solely by the students of IIT Kanpur.  It was initially small and was funded entirely by the Student Gymkhana of IIT Kanpur.But with time it acquired fame in the world of fashion and today the budget is raised through sponsorship.Over the years, Ritambhara has also attracted considerable media attention and numerous well-known sponsors.

Sanjay Mittal: Sanjay Mittal is a Professor of computational fluid dynamics in the Department of Aerospace Engineering at Indian Institute of Technology Kanpur, India.  After doing his B.Tech.  from IIT Kanpur in 1988, he got enrolled at University of Minnesota, Twin Cities for M.S. program.  He then received his Ph.D. and worked as a research associate under Prof. Tayfun E. Tezduyar.  After working for 2 years at Army High Performance Computing center he returned to India and joined IIT Kanpur in the year of 1994 as an Assistant Professor.

Supporting paragraphs: IIT Kanpur Airport Pawan Hans
Answer: Pawan Hans