The space vehicle did not respond to the commands sent by the European Space Agency to raise its orbit. Roscosmos provided these commands to ESA. From Baikonour, Kazakhstan, Roscosmos was able to receive telemetry from Fobos-Grunt on 24 November 2011 but attempts to contact it failed. This telemetry demonstrated that the probe's radio equipment was working and that it was communicating with the spacecraft's flight control systems. Moreover, Roscosmos's top officials believed Fobos-Grunt to be functional, stably oriented and charging batteries through its solar panels. In a late November 2011 interview, the service manager of the European Space Agency for Fobos-Grunt, Wolfgang Hell, stated that Roscosmos had a better understanding of the problem with the spacecraft, saying they reached the conclusion that they have some kind of power problem on board. ESA failed to communicate with the space probe in all of the five opportunities the agency had between 28 and 29 November 2011. During those occasions, the spacecraft did not comply with orders to fire the engines and raise its orbit. The Russian space agency then requested that ESA repeat the orders. The European Space Agency decided to end the efforts to contact the probe on 2 December 2011, with one analyst saying Fobos-Grunt appeared "dead in the water". However, ESA made teams available to assist the Fobos-Grunt mission if there was a change in situation. In spite of that Roscosmos stated their intention to continue to try to contact the space vehicle until it entered the atmosphere. The U.S. Strategic Command's Joint Space Operations Center (JSpOC) tracked the probe and identified at the start of December 2011 that Fobos-Grunt had an elliptical Earth orbit at an altitude of between and , but falling a few miles each day. Re-entry Before reentry, the spacecraft still carried about 7.51 tonnes of highly toxic hydrazine and nitrogen tetroxide on board. This was mostly fuel for the spacecraft's upper stage. These compounds, with melting points of 2 °C and −11.2 °C, are normally kept in liquid form and were expected to burn out during re-entry. NASA veteran James Oberg said the hydrazine and nitrogen tetroxide "could freeze before ultimately entering", thus contaminating the impact area. He also stated that if Fobos-Grunt were not salvaged, it may be the most dangerous object to fall from orbit. Meanwhile, the head of Roscosmos said the probability of parts reaching the Earth surface was "highly unlikely",