Lupin the 3rd - Season 2 Episode 40 Payload

The first attempt on a shipment of Costa Rican diamonds (worth some 9,000,000,000¥ at the time) fails when the captured case is found to contain Zenigata instead. Word is that the diamonds will be transported to their destination, Puerto Rico, by missile. If Lupin loses it, it will be a blow to his reputation. The decision is made to attack the missile at the midpoint of its trajectory, but in order for this to succeed, it is necessary to get the precise launch time. What will the combination play produce?