Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 11 1.  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)
 11/04/2021   05:22:41   ( -78.11,-102.11) 11/04/2021   05:21:28  ( -78.08,-102.14)    2.74                73
 11/04/2021   06:13:26   (  78.12,  65.15) 11/04/2021   06:12:27  (  78.11,  65.28)    2.99                59
 11/04/2021   07:04:10   ( -78.11,-127.50) 11/04/2021   07:03:28  ( -78.09,-127.59)    3.05                42
 11/04/2021   07:54:55   (  78.12,  39.76) 11/04/2021   07:54:27  (  78.12,  39.82)    1.53                28
 11/04/2021   08:45:39   ( -78.11,-152.89) 11/04/2021   08:45:27  ( -78.13,-152.82)    2.83                12
 11/04/2021   09:36:24   (  78.12,  14.37) 11/04/2021   09:36:27  (  78.12,  14.37)    0.07                 3
 11/04/2021   10:27:08   ( -78.12,-178.29) 11/04/2021   10:27:27  ( -78.14,-178.27)    2.71                19
 11/04/2021   11:17:53   (  78.13, -11.03) 11/04/2021   11:18:27  (  78.13, -11.09)    1.40                34
 11/04/2021   12:08:37   ( -78.12, 156.32) 11/04/2021   12:09:27  ( -78.15, 156.28)    3.27                50
 11/04/2021   12:59:22   (  78.13, -36.42) 11/04/2021   13:00:27  (  78.14, -36.54)    2.86                65
 11/04/2021   13:50:13   ( -78.40, 129.39) 11/04/2021   13:51:21  ( -78.38, 132.19)   62.70                68