Russia marks the 70th anniversary of the victory over Nazism: What significance does it have in an epoch of global confrontation? OSW Commentary No. 171, 20 May 2015

The Victory Day celebrations held in Russia on 9 May 2015 were special for marking the seventieth anniversary of the end of World War II but the particular international and domestic context they were set in was of yet greater importance. The element which set the celebrations in 2015 apart from those in the preceding years was how the military and moral aspects of Soviet victory over Nazi Germany was made part of the current geopolitical confrontation with the West concerning the Ukrainian crisis. The escalation of the aggressive rhetoric on Europe and the USA and accusations that the West is destabilising the international situation and striving for conflict was accompanied by a display of the increasing military power of the Russian Federation; the display itself was stronger than has been seen in preceding years. This was a clear sign that Moscow is ready to protect its national interests in the area of foreign policy by any means. At the same time, the creation of an atmosphere of threat and stoking patriotic feelings was intended to mobilise the Russian public around the political leadership while the country’s economic problems are deteriorating further.

Estimation of satellite antenna phase center offsets for Galileo

Satellite antenna phase center offsets for the GalileoInOrbitValidation(IOV) and FullOperationalCapability (FOC) satellites are estimated by two different analysiscenters based on tracking data of a global GNSS network. The mean x- and y-offsets could be determined with a precision of a few centimeters. However, daily estimates of thex-offsets of the IOV satellites show pronounced systematic effects with a peak-to-peak amplitude of up to 70 cm that depend on the orbit model and the elevation of the Sun above the orbital plane. For the IOV y-offsets, no dependence on the orbit model exists but the scatter strongly depends on the elevation of the Sun above the orbital plane. In general, these systematic effects are significantly smaller for the FOC satellites. The z-offsets of the two analysis centers agree within the 10–15 cm level, and the time series do not show systematic effects. The application of an averaged Galileo satellite antenna model obtained from the two solutions results in a reduction of orbit day boundary discontinuities by up to one third—even if an independent software package is used.