An updated version of the AMPS (Average Magnetic field and Polar current System) model (version 1.4) is now available, featuring updated model vectors based on more Swarm data, and using the updated CHAOS model to subtract the background magnetic field.

The updated coefficient file is available on the Swarm dissemination server at the following path:

Level2longterm/MIO

with the filename: SW_OPER_MIO_SHA_2E_00000000T000000_99999999T999999_0104.ZIP

The AMPS model is an empirical model of the ionospheric current system and associated magnetic field.

For more information on the model and on the update:

• Python interface and documentation
• Details on the update