Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2020 12 30.  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)
 01/05/2021   23:57:42   (  78.88, 152.64) 01/05/2021   23:56:35  (  78.87, 152.55)    2.53                67
 01/06/2021   00:48:26   ( -78.89, -40.09) 01/06/2021   00:47:31  ( -78.89, -39.99)    2.15                55
 01/06/2021   01:39:11   (  78.88, 127.27) 01/06/2021   01:38:35  (  78.88, 127.16)    2.39                36
 01/06/2021   02:29:55   ( -78.89, -65.46) 01/06/2021   02:29:31  ( -78.91, -65.38)    2.77                24
 01/06/2021   03:20:40   (  78.88, 101.90) 01/06/2021   03:20:35  (  78.90, 101.78)    3.28                 5
 01/06/2021   04:11:24   ( -78.89, -90.83) 01/06/2021   04:11:31  ( -78.92, -90.77)    4.02                 7
 01/06/2021   05:02:10   (  78.92,  76.29) 01/06/2021   05:02:35  (  78.91,  76.40)    2.37                25
 01/06/2021   05:52:54   ( -78.92,-116.45) 01/06/2021   05:53:32  ( -78.90,-116.41)    2.44                38
 01/06/2021   06:43:39   (  78.92,  50.92) 01/06/2021   06:44:35  (  78.93,  51.01)    2.39                56
 01/06/2021   07:34:23   ( -78.92,-141.82) 01/06/2021   07:35:32  ( -78.92,-141.79)    0.85                69