The deals include anti-tank missiles and a naval air defense weapon system, the people said, asking not to be identified given the information is private. Still, the plan for the first trip to Israel by an Indian prime minister indicates that cooperation goes beyond Delhi's status as the largest buyer of Israeli military hardware.
"The visit is a big milestone," said Shailesh Kumar, senior Asia analyst at political risk firm Eurasia Group. "Officials in both countries believe they face a common external threat: terrorism. Working with Israel fits into Modi's bigger pivot of deeper relations with the U.S. given the U.S.-Israel friendship."
The deals for Spike anti-tank missiles for India's army and Barak-8 air defense missiles for its navy are expected to be finalized in the next two months, the people said. The pacts are worth $1.5 billion, they said, and will see the delivery of the 8,000 missiles two years after the contracts are signed.
The missile deals follow transactions finalized last week for India to obtain medium- and long-range surface-to-air missiles worth $2 billion.
They're part of PM Modi's $250-billion plan to modernize the armed forces by 2025 amid tensions with neighbors China and Pakistan.
Since PM Modi came to power in May 2014, his government has shed his predecessors' reservations on talking about India's ties with Israel.
"It is also a clear message that India does not anymore have qualms in getting closer to Israel, and is wielding an independent foreign policy and not at the cost of its relations with any other countries in the region," said Alvite Singh Ningthoujam, a senior research associate at the Vivekananda International Foundation.
The medium-range missile was developed for the Indian Army by IAI and India's Defence Research and Development Organisation in collaboration with Israel's RAFAEL and IAI/Elta, and included Indian companies like Bharat Electronics Ltd, Bharat Dynamics Ltd and Larsen & Toubro.
Both deals form part of PM Modi's 'Make in India' program, designed to stimulate local production.
"These missile systems are key to adding to our strategic defense capabilities against platforms owned by our neighbors" including anti-ship missiles, cruise missiles, armed drones and modern fighter aircraft, said Anurag Garg, aerospace director at Strategy&, a PriceWaterhouse Coopers consultancy.
The purchase of Spike missiles was approved by India's Defence Acquisition Council in October 2014 and the Barak-8 purchase proposal was given the go-ahead in a meeting on April 3 this year, the people said. Defence Ministry spokesman Nitin Wakankar declined to comment on the deals.
Israel was the third-largest arms supplier to India in the three fiscal years ending March 2016, having bagged 10 deals worth a total of over Rs 6,400 crores ($1 billion), according to an Indian parliament report. Only the U.S. and Russia have made more defense deals with India during the period.
"India-Israel ties have always been strong but never have they been widely publicized," said Ankur Gupta, New Delhi-based vice-president for Aerospace and Defence at Ernst & Young. "There is great strength and value in this relationship as Israel is one of India's foremost supplier of weapons and related high-end technology."
--With assistance from Iain Marlow.
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