You can use “keep current orbits” to automatically fill the Sample, line and external DEM height to match the area that you selected before. If you didn’t satisfy with the result, you can manually geocode it. Use the google earth to help to see the coordinate area.
You can find tips for GCP selection in tutorial part I by UTP Course 2012, notes 2 by Timo Balz tutorial and tutorial 2 by Yuxiao. Hope it will help you.
You can use “keep current orbits” to automatically fill the Sample, line and external DEM height to match the area that you selected before. If you didn’t satisfy with the result, you can manually geocode it. Use the google earth to help to see the coordinate area.
For some tips, you can follow the tutorial here : https://www.sarproz.com/tutorials/
You can find tips for GCP selection in tutorial part I by UTP Course 2012, notes 2 by Timo Balz tutorial and tutorial 2 by Yuxiao. Hope it will help you.