Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2023   18:47:42   (   0.33, 108.99) (  -0.05, 110.77)  202.90                80
 09/21/2023   07:12:57   (  -0.31, 107.36) (  -0.77, 105.28)  237.41                80
 09/22/2023   06:51:56   (  -0.33, 106.31) (   0.46, 109.69)  385.30                80
 09/23/2023   19:17:00   (   0.30, 104.72) (   0.39, 104.24)   54.30                80
 09/25/2023   07:39:34   (  -0.27, 103.10) (  -1.25,  98.76)  495.26                80
 09/26/2023   07:18:33   (  -0.29, 102.05) (  -0.01, 103.16)  128.24                80
 09/27/2023   19:43:38   (   0.26, 100.43) (   0.86,  97.72)  308.71                80
 09/28/2023   19:22:36   (   0.28,  99.38) (  -0.32, 102.14)  314.52                80
 09/30/2023   07:47:49   (  -0.26,  97.74) (  -0.51,  96.65)  124.38                80
 10/02/2023   19:49:13   (   0.26,  95.05) (   0.11,  95.61)   65.14                80