Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 13.  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   17:25:49   (  78.62,-107.17) 04/25/2021   17:24:40  (  78.59,-107.16)    3.76                69
 04/25/2021   18:16:33   ( -78.61,  60.21) 04/25/2021   18:15:41  ( -78.60,  60.15)    2.06                52
 04/25/2021   19:07:18   (  78.62,-132.55) 04/25/2021   19:06:40  (  78.60,-132.56)    2.36                38
 04/25/2021   19:58:02   ( -78.61,  34.83) 04/25/2021   19:57:41  ( -78.61,  34.75)    1.92                21
 04/25/2021   20:48:47   (  78.62,-157.93) 04/25/2021   20:48:40  (  78.61,-157.96)    1.23                 7
 04/25/2021   21:39:31   ( -78.61,   9.45) 04/25/2021   21:39:41  ( -78.62,   9.34)    2.72                10
 04/25/2021   22:30:16   (  78.62, 176.70) 04/25/2021   22:30:40  (  78.63, 176.64)    1.37                24
 04/25/2021   23:21:01   ( -78.65, -16.16) 04/25/2021   23:21:41  ( -78.63, -16.07)    2.69                40
 04/26/2021   00:11:45   (  78.63, 151.32) 04/26/2021   00:12:40  (  78.64, 151.23)    2.57                55
 04/26/2021   01:02:30   ( -78.65, -41.54) 04/26/2021   01:03:41  ( -78.65, -41.47)    1.47                71