Data from sensor and GPS on different Arduino to be sent to raspberry pi SD card

I have two Arduino UNO's. one with a temp and pressure sensor as well as a clock. The other board with GPS. I need the data from both saved together in sinc hence the clock onto an SD card or something similar bareing in mind there will be a lot of data. To connect them I thought Raspberry Pi as it already has an SD card.

First time using Arduino and PI so any ideas how I could connect these and save the data?