This download is a zip file that contains the new firmware for the G6 radio internal to the TX321 and the G5 radio internal to the TX320. The new firmware resolves two issues in the GPS System. The new firmware resolves the UTC offset glitch that caused the transmission to be offset up to 3 seconds. The update also resolves the week number roll over issue and adds support for the next GPS week number roll over on 4/07/2019. The Zip file also contains the software package that uploads the new firmware and the TX321 / TX320 firmware update procedure.