Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 23.  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   (  78.60,-107.08) 04/25/2021   17:24:40  (  78.60,-107.08)    0.72                69
 04/25/2021   18:16:33   ( -78.60,  60.26) 04/25/2021   18:15:41  ( -78.60,  60.19)    1.59                52
 04/25/2021   19:07:18   (  78.61,-132.46) 04/25/2021   19:06:40  (  78.61,-132.48)    0.81                38
 04/25/2021   19:58:02   ( -78.60,  34.88) 04/25/2021   19:57:41  ( -78.61,  34.78)    2.58                21
 04/25/2021   20:48:47   (  78.61,-157.84) 04/25/2021   20:48:40  (  78.63,-157.88)    2.26                 7
 04/25/2021   21:39:32   ( -78.64,   9.27) 04/25/2021   21:39:41  ( -78.63,   9.37)    2.75                 9
 04/25/2021   22:30:17   (  78.65, 176.55) 04/25/2021   22:30:40  (  78.64, 176.71)    3.66                23
 04/25/2021   23:21:01   ( -78.64, -16.11) 04/25/2021   23:21:41  ( -78.64, -16.03)    1.66                40
 04/26/2021   00:11:46   (  78.65, 151.17) 04/26/2021   00:12:40  (  78.65, 151.31)    3.10                54
 04/26/2021   01:02:30   ( -78.64, -41.49) 04/26/2021   01:03:41  ( -78.65, -41.44)    1.45                71