Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 20.  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,-107.05) 04/25/2021   17:24:40  (  78.60,-107.05)    0.30                69
 04/25/2021   18:16:33   ( -78.59,  60.30) 04/25/2021   18:15:41  ( -78.61,  60.23)    2.00                52
 04/25/2021   19:07:18   (  78.60,-132.43) 04/25/2021   19:06:40  (  78.62,-132.45)    1.63                38
 04/25/2021   19:58:03   ( -78.63,  34.69) 04/25/2021   19:57:41  ( -78.62,  34.83)    3.39                22
 04/25/2021   20:48:47   (  78.60,-157.81) 04/25/2021   20:48:40  (  78.63,-157.85)    3.08                 7
 04/25/2021   21:39:32   ( -78.63,   9.31) 04/25/2021   21:39:41  ( -78.63,   9.42)    2.44                 9
 04/25/2021   22:30:16   (  78.64, 176.58) 04/25/2021   22:30:39  (  78.64, 176.75)    3.71                23
 04/25/2021   23:21:00   ( -78.64, -16.07) 04/25/2021   23:21:40  ( -78.65, -15.99)    2.13                40
 04/26/2021   00:11:45   (  78.64, 151.20) 04/26/2021   00:12:40  (  78.62, 151.10)    3.19                55
 04/26/2021   01:02:29   ( -78.64, -41.45) 04/26/2021   01:03:40  ( -78.66, -41.40)    2.69                71