Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 22.  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)
 04/25/2021   17:25:48   (  78.59,-106.98) 04/25/2021   17:24:39  (  78.61,-106.98)    2.56                69
 04/25/2021   18:16:33   ( -78.62,  60.13) 04/25/2021   18:15:40  ( -78.62,  60.29)    3.48                53
 04/25/2021   19:07:17   (  78.59,-132.36) 04/25/2021   19:06:39  (  78.63,-132.39)    3.98                38
 04/25/2021   19:58:02   ( -78.62,  34.75) 04/25/2021   19:57:40  ( -78.63,  34.88)    2.83                22
 04/25/2021   20:48:47   (  78.63,-157.97) 04/25/2021   20:48:40  (  78.60,-158.03)    3.05                 7
 04/25/2021   21:39:31   ( -78.62,   9.37) 04/25/2021   21:39:40  ( -78.64,   9.47)    2.85                 9
 04/25/2021   22:30:16   (  78.63, 176.65) 04/25/2021   22:30:40  (  78.62, 176.56)    2.33                24
 04/25/2021   23:21:00   ( -78.63, -16.00) 04/25/2021   23:21:40  ( -78.65, -15.93)    3.51                40
 04/26/2021   00:11:45   (  78.63, 151.27) 04/26/2021   00:12:40  (  78.63, 151.16)    2.42                55
 04/26/2021   01:02:30   ( -78.66, -41.62) 04/26/2021   01:03:41  ( -78.63, -41.59)    3.60                71