Space News reports that in 2007 and 2008 NASA and the USGS recorded “anomalous radio frequency events” that are suspected to have originated in China. The signals targeted the Terra and Landsat-7 sat’s. Terra is one of the platforms carrying MODIS and ASTER sensors and Landsat is home to ETM+. These are civilian Earth Observation sat’s, not military platforms. A congressional report is expected to say that “cyber-hackers achieved all steps required to command” Terra and that the satellite experienced nine or more minutes of attempted interference in the October 2008 incident”. According to Space Daily, the attempt hacked SvalSat systems on Svalbard to access the satellites.
Digital Trends reports the same story with comments from the Chinese Embassy to the US.