In case this information helps. I tried changing the speed of the other GPS unit from 57600 to 9600 baud. It still did not work. I believe the reason for this is the period of the updates rather than the baud rate. The two GPS units that I am using are the Adafruit Ultimate GPS and a LS20031. So I think the issue is the 5hz output set from the factory on the LS20031.
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In case this information helps. I tried changing the speed of the other GPS unit from 57600 to 9600 baud. It still did not work. I believe the reason for this is the period of the updates rather than the baud rate. The two GPS units that I am using are the Adafruit Ultimate GPS and a LS20031. So I think the issue is the 5hz output set from the factory on the LS20031.