Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 16.  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   (  78.58,-106.95) 04/25/2021   17:24:40  (  78.61,-107.02)    2.80                69
 04/25/2021   18:16:34   ( -78.61,  60.18) 04/25/2021   18:15:41  ( -78.61,  60.28)    2.11                53
 04/25/2021   19:07:19   (  78.62,-132.56) 04/25/2021   19:06:40  (  78.62,-132.42)    3.14                39
 04/25/2021   19:58:03   ( -78.61,  34.80) 04/25/2021   19:57:41  ( -78.63,  34.87)    1.93                22
 04/25/2021   20:48:48   (  78.62,-157.94) 04/25/2021   20:48:40  (  78.63,-157.82)    2.75                 8
 04/25/2021   21:39:31   ( -78.62,   9.43) 04/25/2021   21:39:40  ( -78.64,   9.46)    2.70                 9
 04/25/2021   22:30:16   (  78.63, 176.68) 04/25/2021   22:30:39  (  78.65, 176.77)    3.12                23
 04/25/2021   23:21:00   ( -78.62, -15.95) 04/25/2021   23:21:40  ( -78.65, -15.94)    3.89                40
 04/26/2021   00:11:45   (  78.63, 151.30) 04/26/2021   00:12:40  (  78.63, 151.13)    3.86                55
 04/26/2021   01:02:30   ( -78.66, -41.56) 04/26/2021   01:03:41  ( -78.63, -41.59)    2.88                71