I have downloaded several Sentinel-1 images, then I made radiometric terrain correction and convert DN value to dB. The first mosaic is made by using of two processed images in ENVI. and land area is also be removed.The masked mosaic output's size is about 4.8 G, and then two masked mosaic images( one individual mosaic image size is about 4.8G) are be made second mosaic. However,the process is very slowly this time. About 17 hours later, the mosaic is only about 75%.
My question is that the mosaic time of two images which size is only about 4.8G in ENVI is still not completed after 17 hours is a normal phenomenon or an unnormal phenomenon?If it is a normal phenomenon, then the reason is what?
Thanks for your attention and your reply in advance.