Simultaneous Nadir Overpasses (SNOs) between FY3D and NPP
TLE Epoch: 2023 8 29.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/12/2023   00:16:21   (  81.17, 116.21) 09/12/2023   00:17:27  (  81.12, 119.89)   63.16                66
 09/12/2023   01:07:02   ( -81.18, -74.41) 09/12/2023   01:08:17  ( -81.18, -74.59)    3.09                75
 09/12/2023   01:57:47   (  81.18,  92.91) 09/12/2023   01:59:01  (  81.17,  92.94)    0.72                74
 09/12/2023   02:48:34   ( -81.18,-100.03) 09/12/2023   02:49:47  ( -81.18,-100.02)    0.32                73
 09/12/2023   03:39:19   (  81.18,  67.29) 09/12/2023   03:40:32  (  81.19,  67.12)    3.08                73