- Consideration of time-of-day/azimuth of overhead satellite based on shadows and perspective.
- Comparison to other imagery of the same location checking for portable objects (such as vehicles) and keeping track of when they appear and disappear, and whether they're present in the imagery being analysed.
- Consideration of cloud coverage and weather conditions to rule out unwanted satellite passes.
Then write up a report and publish it, making it a believable and concrete finding instead of a finding that otherwise may just be perceived to be speculation/vibes.
[1] https://soaratlas.com/maps/asia-jordan-strike-at-u-s-aircraf...