Summary North Korea failed with a much-hyped launch of an Unha-3 in April.
Fresh analysis of new satellite imagery confirms apparent North Korean preparations for an imminent long-range missile test -- perhaps as early as next week -- a US think tank said Friday.
Speculation over a new test, following a failed launch in April, has intensified in recent weeks and drew a sharp warning Thursday from the UN Security Council to Pyongyang.
The US-Korea Institute at Johns Hopkins University said new images provided by satellite operator DigitalGlobe clearly pointed to advanced launch preparations at the Sohae satellite launch station.
"If Pyongyang follows past practice in preparing for a launch, it could be ready to fire a rocket as early as the end of the first week in December," Nick Hansen, an expert on imagery analysis, wrote on the institute's website 38 North.
The analysis highlighted images showing trailers used for carrying the first two stages of an Unha-3 rocket parked near the main missile assembly building.
"(This is) a clear indicator that the rocket stages are being checked out before moving to the pad for an eventual launch," Hansen said.
Empty tanks spotted at four locations indicated that the propellant buildings at the pad have likely been filled in preparation for fuelling the rocket, he added.
North Korea is known to have an inter-continental ballistic missile (ICBM) in development -- the Taepodong-2 -- but it has never been tested successfully.
In April, North Korea failed with a much-hyped launch of an Unha-3 that Pyongyang said was aimed at placing a satellite in orbit.
The United States and United Nations insisted it was a disguised ballistic missile test using a three-stage variant of the Taepodong-2.
The April test put a halt to the latest international effort to engage North Korea, with the United States calling off plans to deliver badly needed food assistance.
On Thursday, the UN Security Council warned North Korea against carrying out another launch bid.
"We all agree it would be extremely inadvisable to proceed with the test," the head of the North Korea sanctions committee at the council, Portuguese Ambassador Jose Filipe Moraes Cabral, told reporters.
