Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 19.  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   (  78.58,-106.95) 04/25/2021   17:24:39  (  78.62,-106.95)    3.51                69
 04/25/2021   18:16:33   ( -78.62,  60.17) 04/25/2021   18:15:40  ( -78.62,  60.33)    3.63                53
 04/25/2021   19:07:18   (  78.62,-132.57) 04/25/2021   19:06:40  (  78.60,-132.60)    3.24                38
 04/25/2021   19:58:02   ( -78.62,  34.79) 04/25/2021   19:57:41  ( -78.60,  34.68)    3.04                21
 04/25/2021   20:48:47   (  78.62,-157.95) 04/25/2021   20:48:40  (  78.61,-158.00)    2.17                 7
 04/25/2021   21:39:31   ( -78.62,   9.41) 04/25/2021   21:39:41  ( -78.61,   9.28)    3.08                10
 04/25/2021   22:30:16   (  78.63, 176.68) 04/25/2021   22:30:40  (  78.62, 176.60)    1.79                24
 04/25/2021   23:21:00   ( -78.62, -15.96) 04/25/2021   23:21:41  ( -78.63, -16.13)    3.73                41
 04/26/2021   00:11:45   (  78.63, 151.30) 04/26/2021   00:12:40  (  78.64, 151.19)    2.44                55
 04/26/2021   01:02:30   ( -78.66, -41.58) 04/26/2021   01:03:41  ( -78.64, -41.54)    2.30                71