Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 10 30.  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)
 10/30/2021   15:24:02   ( -71.42, 127.23) 10/30/2021   15:25:13  ( -71.43, 127.16)    2.51                71
 10/30/2021   16:14:46   (  71.33, -65.30) 10/30/2021   16:14:40  (  71.34, -65.34)    1.31                 6
 10/30/2021   17:05:24   ( -71.06, 102.49) 10/30/2021   17:04:11  ( -71.16, 102.01)   20.18                73
 11/02/2021   07:40:26   ( -71.77,-117.46) 11/02/2021   07:41:37  ( -71.68,-116.54)   33.97                71
 11/02/2021   08:31:04   (  71.39,  50.56) 11/02/2021   08:31:08  (  71.37,  50.59)    2.43                 4
 11/02/2021   09:21:45   ( -71.26,-141.91) 11/02/2021   09:20:38  ( -71.25,-141.96)    2.40                67
 11/04/2021   23:56:50   ( -72.18,  -2.28) 11/04/2021   23:57:57  ( -72.08,   0.04)   80.03                67
 11/05/2021   00:47:20   (  71.39, 166.50) 11/05/2021   00:47:35  (  71.39, 166.51)    0.40                15
 11/05/2021   01:38:01   ( -71.26, -25.95) 11/05/2021   01:37:05  ( -71.28, -26.04)    3.55                56
 11/07/2021   17:03:37   (  71.40, -77.56) 11/07/2021   17:04:03  (  71.40, -77.58)    1.18                26
 11/07/2021   17:54:19   ( -71.31,  89.91) 11/07/2021   17:53:33  ( -71.29,  89.87)    2.63                46
 11/10/2021   09:19:54   (  71.41,  38.38) 11/10/2021   09:20:31  (  71.40,  38.30)    2.72                37
 11/10/2021   10:10:37   ( -71.37,-154.23) 11/10/2021   10:10:00  ( -71.35,-154.15)    3.50                37