OFFICE OF CURRENT INTELLIGENCE
prINTELLIGENCE WEEKLY REVIEW
id INTERPLANETARY OPERATIONS
USSR's Luna IV, launchedpril, failed in its mission to collect detailed newon the surface of the moon. It was the twelfth Soviet lunar operation, tho third attempted this year.
The vehicle approached no closer thaniles from tho noon,
Since the fall0 the so-called parking orbit technique has been used for both lunar and interplanetary probes. Two upper stages were added to the basicto place the space vehicle into parking orbit around the earth, the other to power that portion of tho vehicle thatrajectory toward the moon or planet. The system is capable of placing0 poundsparking orbit for lunar and planetary missions.
Sovietseightounds for Luna IV. It is estimatedehicle of this size could have soft-landed aa instrumented packageounds on the moon, orackage ofounds into orbit around the moon.
The Soviets' lunar operations began in the fall8eries of six attempts to hit the moou. The first real success occurred inhen
Lunik II impacted on tho moon.
9 Lunik III took pictures of the far side of the moon ln one of the most remarkable successes of the Soviet spaco program.
The nine operations which made up the first phase of the Soviet lunar programirect asceot technique with payloadsounds. The propulsion system for all was theCBM with one additional upper stage.
interplanetary attempts to reach Venus and Marsnly the probe launched toward Marsovember appears to bo The first two lunar attempts to use the parkingtechnique, in January and February of this year, also failed
INTELLIGENCE WEEKLY REVIEW