PIX4D while trying to import states that at least 3 images required, does this mean that I cannot process satellite stereo images
Hi Zothan,
Pix4Dmapper is designed to work with frame (perspective or fisheye) cameras and at least 3 images. 3 images ensure higher accuracy, this is why we set this restriction.
If you have at least 3 satellite images taken by a frame camera, you could get a trial of Pix4Dmapper and give it a try 
Best regards,