Turkey will receive from Russia the advanced S-400 missile system by the end of 2019.
"Practically speaking, the contract is entering the phase of realization," said Vladimir Kozhin, a presidential aide who oversees matters of military cooperation. "All parameters, all technologies, the entire deal has been agreed."
"All aspects have been resolved over the past few days," Kozhin said. "The contract will consist of two parts financially: part of it will be paid by Turkey and part through a credit provided by Russia."
"The first deliveries are likely to begin at the end of 2019, beginning of 2020," Kozhin was reported as saying by Russian news agencies.
The two countries on Friday finalized a financial agreement for the project, under which part of the cost would be financed through a Russian loan, the Turkish Defense Industries body said, without revealing details of the deal.
The Turkish Defense Industries Undersecretariat said in a statement that Turkey would buy at least one S-400 surface-to-air missile battery with the option of procuring a second battery. The delivery of the first battery was scheduled for the first quarter of 2020, the statement said.
The Defense Industries agency said the Russian system would be operated under the full control of the Turkish military and "in an independent manner, without any links to any outside elements."
"The system's operation, management, and systems recognizing friends and foes will be undertaken through national means," the Defense Industries body said.
The S-400 has a range of up to 400 kilometers and can simultaneously engage multiple targets. It is capable of shooting down ballistic missile warheads along with aircraft and cruise missiles.