Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2022 9 20.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2022   20:39:07   ( -72.57,  49.05) 09/20/2022   20:40:18  ( -72.47,  50.17)   39.11                71
 09/20/2022   21:29:45   (  72.17,-142.82) 09/20/2022   21:29:49  (  72.16,-142.74)    2.88                 4
 09/20/2022   22:20:28   ( -72.05,  24.72) 09/20/2022   22:19:19  ( -72.04,  24.69)    1.21                69
 09/23/2022   12:06:09   (  72.55,  -2.63) 09/23/2022   12:07:20  (  72.44,  -1.64)   35.27                71
 09/23/2022   12:56:47   ( -72.18, 165.43) 09/23/2022   12:56:53  ( -72.16, 165.50)    2.66                 6
 09/23/2022   13:47:31   (  72.07, -27.06) 09/23/2022   13:46:20  (  72.07, -27.03)    1.43                71
 09/26/2022   03:33:12   ( -72.61, -54.48) 09/26/2022   03:34:22  ( -72.53, -53.22)   42.76                70
 09/26/2022   04:23:49   (  72.16, 113.74) 09/26/2022   04:23:54  (  72.17, 113.76)    1.74                 5
 09/26/2022   05:14:33   ( -72.09, -78.82) 09/26/2022   05:13:24  ( -72.06, -78.81)    3.35                69
 09/28/2022   19:00:14   (  72.60,-106.19) 09/28/2022   19:01:24  (  72.47,-105.09)   39.41                70
 09/28/2022   19:50:50   ( -72.17,  61.98) 09/28/2022   19:50:57  ( -72.15,  61.96)    2.53                 7
 09/28/2022   20:41:34   (  72.07,-130.53) 09/28/2022   20:40:24  (  72.05,-130.58)    3.29                70
 10/01/2022   10:27:15   ( -72.62,-157.96) 10/01/2022   10:28:25  ( -72.55,-156.71)   42.43                70
 10/01/2022   11:17:52   (  72.17,  10.26) 10/01/2022   11:17:57  (  72.18,  10.26)    1.65                 5
 10/01/2022   12:08:36   ( -72.10, 177.70) 10/01/2022   12:07:27  ( -72.07, 177.71)    2.48                69
 10/04/2022   01:54:16   (  72.57, 150.41) 10/04/2022   01:55:27  (  72.46, 151.38)   34.44                71
 10/04/2022   02:44:54   ( -72.19, -41.52) 10/04/2022   02:45:00  ( -72.19, -41.47)    1.80                 6
 10/04/2022   03:35:38   (  72.09, 125.97) 10/04/2022   03:34:27  (  72.09, 125.98)    0.77                71