Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 6 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2023   01:12:16   (   0.18,-162.31) (  -0.82,-166.62)  492.07                80
 06/19/2023   00:56:36   (   0.16,-162.70) (   0.30,-162.19)   58.45                80
 06/20/2023   13:16:20   (  -0.20,-163.30) (   0.78,-167.61)  491.02                80
 06/21/2023   12:57:59   (  -0.18,-163.69) (  -0.28,-163.17)   59.14                80
 06/23/2023   01:20:31   (   0.21,-164.28) (  -0.77,-168.62)  494.65                80
 06/24/2023   01:04:49   (   0.19,-164.67) (   0.29,-164.18)   55.41                80
 06/25/2023   13:24:34   (  -0.23,-165.26) (   0.78,-169.59)  494.68                80
 06/26/2023   13:08:53   (  -0.21,-165.64) (  -0.34,-165.17)   55.02                80
 06/28/2023   01:28:45   (   0.24,-166.22) (  -0.76,-170.60)  499.98                80
 06/29/2023   01:13:03   (   0.23,-166.60) (   0.31,-166.17)   49.15                80