Iran appears to be preparing another satellite launch after twice failing this year to put one in orbit, despite US accusations that the Islamic Republic's program helps it develop ballistic missiles.
Satellite images of the Imam Khomeini Space Center in Iran's Semnan province this month show increased activity at the site, as heightened tensions persist between Washington and Tehran over its collapsing nuclear deal with world powers.
While Iran routinely only announces such launches after the fact, that activity coupled with an official saying a satellite would soon be handed over to the country's Defense Ministry suggests the attempt will be coming soon.
"The Imam Khomeini space launch center is usually quite empty," said Fabian Hinz, a researcher at the James Martin Center for Nonproliferation Studies at the Middlebury Institute of International Studies in Monterey, California.
"Now we've seen pictures where you can see activities at this assembly center and something happening at the (launch) pad." "If you put both together it sounds very likely there's something that's going to happen," he said.
The satellite images of the space center, taken Aug. 9, show activity at one facility there, Hinz said Sunday. Another image of a launch pad at the facility shows water that's run off it and pooled, likely a sign of workers preparing the site for a launch, he said.
CNN first reported on the satellite images of the space center, some 240 kilometers (150 miles) southeast of Iran's capital, Tehran.
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Iranian satellite launches had been anticipated before the end of the year.
In July, Iran's Information and Communications Technology Minister Mohammad Javad Azari Jahromi told The Associated Press that Tehran planned three more launches this year, two for satellites that do remote-sensing work and another that handles communications.
The Nahid-1 is reportedly the telecommunication satellite, which authorities plan to have in orbit for two-and-a-half months. Nahid in Farsi means "Venus."