Dear scientists, Please find attached the files from the radiosonding balloon launch performed today at Princess Elisabeth Antarctica. Please note that some issue occurred during today's launches. A first attempt was done and successful until a few minutes after the release of the balloon where GPS and the sonde status failed on the computer. The launch was therefore cancelled and a second balloon was prepared. Once released, the second sonde performed better than the previous one but some interruption in the GPS signal were detected on the computer screen. This second launch was not interrupted as the GPS signal seemed to stabilize as the balloon went higher. Hope the data will be usable from this sonding. No other symptom or bad connection to the system was detected. Merry Christmas to all and kind regards, Henri