The source said the reason for the postponement of the start of "proton-M"

Note to the control system upper stage "breeze-M" was the reason for the postponement of the launch of the carrier rocket "proton-M" with telecommunication satellite "Express-80" and "Express-103" from the Baikonur cosmodrome with 30 to 31 July, reported RIA Novosti source in the space industry.

Previously, Roskosmos announced that the launch of "Proton" postponed for a day for additional inspections of components and assemblies.

"During inspections of the control system upper stage "breeze-M" received a comment, so the launch of the rocket "proton-M" was moved to the day", - said the Agency interlocutor.

According to him, this observation poses no problem for implementation start July 31.

According to Roscosmos, the launch of "Proton" is scheduled on Friday in 0.25 MSK. The entire flight until separation of the spacecraft should take more than 18 hours and become the longest in the history of launches of "Proton".

For the rocket "proton" this will be the first and only in 2020 start. He also will become the eighth space launch of Russia this year.

Send "parlay Bets" into orbit was planned for the end of March, but the missile had to return to Moscow for the replacement of defective components that are discovered at the launch site. According to the newspaper "Vedomosti", it was about the faulty bolts used for fastening pipelines second stage of the rocket. The General Director of Roscosmos, Dmitry Rogozin, said that the marriage was admitted in 2015-2016 in the manufacture of individual components at the Ust-Katavsky car-building plant in Chelyabinsk region.

Spacecraft "Express-80" and "Express-103" manufactured by "Information satellite systems named after Reshetnev" in the interests of the enterprise "Space communication" on the basis of satellite platform "Express-1000H". It is expected that they will work for 15 years in geostationary orbit in the setups 80 degrees and 96.5 degrees East longitude respectively. The satellites are designed to provide fixed and mobile communications, digital broadcasting, high-speed Internet access and data transfer in C-, Ku - and L-bands, in Russia and in the CIS countries.