Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 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)
 04/25/2021   17:25:49   (  78.62,-107.15) 04/25/2021   17:24:40  (  78.59,-107.16)    3.44                69
 04/25/2021   18:16:33   ( -78.61,  60.22) 04/25/2021   18:15:41  ( -78.59,  60.14)    2.36                52
 04/25/2021   19:07:18   (  78.62,-132.53) 04/25/2021   19:06:40  (  78.60,-132.56)    2.17                38
 04/25/2021   19:58:02   ( -78.61,  34.84) 04/25/2021   19:57:41  ( -78.61,  34.73)    2.40                21
 04/25/2021   20:48:47   (  78.62,-157.91) 04/25/2021   20:48:40  (  78.61,-157.96)    1.43                 7
 04/25/2021   21:39:31   ( -78.61,   9.46) 04/25/2021   21:39:41  ( -78.62,   9.33)    3.19                10
 04/25/2021   22:30:16   (  78.62, 176.71) 04/25/2021   22:30:40  (  78.63, 176.63)    1.94                24
 04/25/2021   23:21:01   ( -78.65, -16.15) 04/25/2021   23:21:41  ( -78.63, -16.08)    2.33                40
 04/26/2021   00:11:45   (  78.62, 151.34) 04/26/2021   00:12:40  (  78.64, 151.23)    3.13                55
 04/26/2021   01:02:30   ( -78.65, -41.53) 04/26/2021   01:03:41  ( -78.65, -41.49)    1.00                71