Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 7 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2023   13:17:06   (  -0.25,-167.51) (  -0.34,-167.14)   42.62                80
 07/04/2023   01:21:15   (   0.27,-168.44) (   0.32,-168.14)   32.94                80
 07/06/2023   13:25:18   (  -0.29,-169.36) (  -0.35,-169.13)   26.70                80
 07/09/2023   01:29:28   (   0.30,-170.27) (   0.34,-170.13)   15.84                80
 07/11/2023   13:30:50   (  -0.31,-171.18) (  -0.32,-171.10)    8.95                80
 07/14/2023   01:35:00   (   0.33,-172.07) (   0.33,-172.10)    4.03                80