Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 24.  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   17:25:48   (  78.59,-107.00) 04/25/2021   17:24:39  (  78.61,-106.98)    2.34                69
 04/25/2021   18:16:32   ( -78.59,  60.33) 04/25/2021   18:15:40  ( -78.61,  60.28)    2.95                52
 04/25/2021   19:07:17   (  78.59,-132.38) 04/25/2021   19:06:39  (  78.63,-132.38)    3.63                38
 04/25/2021   19:58:02   ( -78.63,  34.72) 04/25/2021   19:57:40  ( -78.63,  34.87)    3.37                22
 04/25/2021   20:48:47   (  78.63,-157.99) 04/25/2021   20:48:40  (  78.61,-158.03)    3.14                 7
 04/25/2021   21:39:31   ( -78.63,   9.34) 04/25/2021   21:39:40  ( -78.64,   9.47)    2.97                 9
 04/25/2021   22:30:16   (  78.63, 176.63) 04/25/2021   22:30:40  (  78.62, 176.57)    2.11                24
 04/25/2021   23:21:00   ( -78.63, -16.04) 04/25/2021   23:21:40  ( -78.65, -15.94)    3.22                40
 04/26/2021   00:11:45   (  78.64, 151.25) 04/26/2021   00:12:40  (  78.63, 151.17)    1.82                55
 04/26/2021   01:02:29   ( -78.63, -41.42) 04/26/2021   01:03:41  ( -78.63, -41.59)    3.83                72