Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 15.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2021   03:22:09   (  78.26, 106.03) 05/23/2021   03:21:03  (  78.25, 102.61)   77.32                66
 05/23/2021   04:13:00   ( -78.54, -88.34) 05/23/2021   04:11:51  ( -78.52, -88.33)    2.55                69
 05/23/2021   05:03:45   (  78.53,  79.06) 05/23/2021   05:02:55  (  78.55,  79.07)    1.95                50
 05/23/2021   05:54:29   ( -78.55,-113.73) 05/23/2021   05:53:51  ( -78.53,-113.75)    1.54                38
 05/23/2021   06:45:14   (  78.53,  53.67) 05/23/2021   06:44:55  (  78.56,  53.66)    3.00                19
 05/23/2021   07:35:58   ( -78.55,-139.12) 05/23/2021   07:35:51  ( -78.55,-139.16)    1.02                 7
 05/23/2021   08:26:43   (  78.54,  28.28) 05/23/2021   08:26:55  (  78.57,  28.25)    4.11                12
 05/23/2021   09:17:27   ( -78.55,-164.51) 05/23/2021   09:17:51  ( -78.56,-164.58)    1.58                24
 05/23/2021   10:08:13   (  78.58,   2.66) 05/23/2021   10:08:56  (  78.55,   2.59)    3.36                43
 05/23/2021   10:58:56   ( -78.56, 170.10) 05/23/2021   10:59:51  ( -78.57, 170.01)    2.58                55
 05/23/2021   11:49:42   (  78.58, -22.73) 05/23/2021   11:50:56  (  78.56, -22.82)    2.78                74