What position is in the logged GNGGA message while in RTK FIX?

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1

Finally getting back to using my Postcard + Compatibility Shield and I have two very basic newbie questions:

  1. When the Postcard is in RTK Fix Mode (4), is the position being logged to the shield’s SD card the RTK Fix position or the GPS fix position?
  2. If it is the RTK Fix position, is it corrected to WGS84 (the default for GPS) or is corrected to the datum used by the Base (NAD83(2011)(Epoch 2010.00)?

The reason I ask is the the position logged on the SD card is different than the position logged in the SW Maps track and I’ like to understand why.

Thanks! Len