Tag Archives: OHB

Galileo 9 and 10 broadcasting navigation messages

Galileo signalsEurope’s ninth and tenth Galileo satellites started broadcasting working navigation messages 29 January. These two satellites were launched together on 11 September last year.

Once safely in orbit and their systems activated, their navigation payloads and search and rescue transponders were subjected to a rigorous process of in-orbit testing, to ensure their performance reached the necessary specifications to become part of the Galileo system.

Radio-frequency measurements of the Galileo signals were made from ESA’s Redu centre in Belgium. The site boasts a 20 m-diameter dish to analyse their signal shape in high resolution. Read more…

Anatomy of a Galileo Launch

Many months of sustained effort goes into each and every Galileo launch, shown in this sequence of pictures selected from the four Galileo launches so far. The navigation payloads for each satellite are manufactured at Surrey Satellite Technology Ltd in the UK, which are then integrated to their satellite platforms at OHB in Germany. Next comes the rigorous test campaign to ensure the satellites can operate as planned in space, which takes place at ESA’s ESTEC Test Centre in the Netherlands.

The four-stage Soyuz ST-B launcher which deploys each pair of Galileo satellites into medium-Earth orbit is constructed in Russia, then sailed from St. Petersburg to Europe’s Spaceport in French Guiana. Once the Galileo satellites have passed testing they are transported by air to French Guiana, so the proper launch campaign can begin. The first three stages of the Soyuz are assembled horizontally, then raised vertically onto the launch pad. Read more…