The GPS system developer u-blox released an enhanced LEA-6H GPS module that also supports Russian GLONASS navigation. The GLONASS satellite system is an alternative as well as complementary system to the US-based Global Positioning System (GPS). It currently has 22 deployed satellites, with the complete constellation of 24 satellites needed for complete global coverage scheduled for end 2011. Features of the 17.0 x 22.4 x 2.4-mm device include UART, USB and DDC (I2C compliant) interfaces in Crystal and TCXO versions with an onboard RTC Crystal for faster warm and hot starts. An integrated antenna supervisor aids in GPS location, communication, and acceleration, and the device is able to navigate down to –162 dBm and –148 dBm coldstart.