A Proton-M rocket failed to reach its initial orbit during the December 5 launch, causing it to dump the three high-tech Glonass-M satellites near the Hawaii Islands.

It marked an embarrassing setback to Russia's much-publicised attempts to introduce a global rival to the US Global Positioning System (GPS), a programme that was first begun by the Soviet Union in 1976.

The last three satellites would have enabled Russia to fully deploy the system next year, meeting Prime Minister Vladimir Putin's commitment to equip all new cars sold in Russia with Glonass readers in 2012.

Space officials said the calculation mistake was easy to correct, and that they were relieved that there was nothing wrong with the actual rocket itself.

"We have no questions regarding the Proton," investigating commission chief Gennady Raikunov told the Interfax news agency. "Its launches could be resumed."

Raikunov said the fault lay with the Energia Rocket And Space Corporation, which designed the carrier.

He said that the company failed to account for the fact that the updated version of the rocket had bigger fuel tanks, which weighed more when filled to the top.

"This increased the payload weight and the rocket did not have the energy to deliver the satellites to orbit," the space official said.

Energia officials could not be reached for comment Friday.

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