Power glitch and then a GPS transmit trip because not seeing enough satellites. Trip went to the site to check the GPS antenna. Switched out antenna with a new one and no improvement. Switched back to the old one. Also did a reset of the GPS module. Then it started to pick up more satellites. May have improved from taking it apart and re-connecting or the GPS module reset or combination of both. Files for July 8 10:00 to 13:00 are missing. Other files have 0 vectors due to the transmit trip.