Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 7 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)
 07/21/2023   02:49:58   (   0.39, 171.17) (   0.11, 169.96)  138.20                80
 07/22/2023   02:28:59   (   0.37, 170.17) (   1.32, 174.36)  478.86                80
 07/23/2023   14:51:25   (  -0.39, 168.64) (  -0.44, 168.91)   30.67                80
 07/25/2023   03:16:41   (   0.42, 167.09) (  -0.41, 163.42)  418.68                80
 07/26/2023   02:55:41   (   0.40, 166.09) (   0.81, 167.83)  198.09                80
 07/27/2023   15:20:47   (  -0.43, 164.57) (   0.07, 162.37)  250.24                80
 07/28/2023   14:59:48   (  -0.41, 163.57) (  -1.16, 166.78)  365.80                80
 07/30/2023   03:25:02   (   0.44, 162.04) (   0.25, 161.30)   84.66                80
 08/01/2023   15:26:29   (  -0.45, 159.52) (  -0.62, 160.25)   82.59                80