The LTMG503 series is the most recent Mobile Mark antenna to receive an Iridium® certification. This 5 antenna in 1 housing contains the following: an Iridium antenna, a GNSS antenna, a Cellular/LTE antenna and a WiFi antenna. The GNSS element operates on GPS, Galileo, Glonass, QZSS or Beidou at 1561, 1575, & 1602 MHz.
The LTMG-503 is designed for data modems with the ability to switch from Cellular to WiFi, or to Iridium for the Comms data link. Furthermore, you specify LTM503 for a GPS model.