Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 27.  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)
 01/28/2020   17:58:25   ( -70.93,  86.46) 01/28/2020   17:59:35  ( -70.83,  87.59)   42.38                70
 01/28/2020   18:49:01   (  70.40,-105.36) 01/28/2020   18:49:08  (  70.40,-105.41)    2.03                 7
 01/28/2020   19:39:42   ( -70.30,  62.12) 01/28/2020   19:38:38  ( -70.29,  62.06)    2.13                64
 01/31/2020   10:14:52   ( -71.03,-157.82) 01/31/2020   10:16:01  ( -70.95,-156.35)   54.06                69
 01/31/2020   11:05:26   (  70.40,  10.52) 01/31/2020   11:05:36  (  70.41,  10.48)    1.88                10
 01/31/2020   11:56:07   ( -70.30, 178.01) 01/31/2020   11:55:06  ( -70.30, 177.96)    2.22                61
 02/03/2020   02:31:19   ( -71.14, -42.10) 02/03/2020   02:32:28  ( -71.02, -40.37)   63.98                69
 02/03/2020   03:21:51   (  70.41, 126.41) 02/03/2020   03:22:04  (  70.42, 126.37)    1.65                13
 02/03/2020   04:12:32   ( -70.30, -66.09) 02/03/2020   04:11:34  ( -70.31, -66.15)    2.51                58
 02/05/2020   18:47:45   ( -71.25,  73.61) 02/05/2020   18:48:53  ( -71.13,  75.69)   75.63                68
 02/05/2020   19:38:15   (  70.42,-117.70) 02/05/2020   19:38:31  (  70.42,-117.75)    1.75                16
 02/05/2020   20:28:56   ( -70.31,  49.80) 02/05/2020   20:28:01  ( -70.31,  49.73)    2.74                55
 02/08/2020   11:04:12   ( -71.36,-170.68) 02/08/2020   11:05:19  ( -71.24,-168.26)   87.32                67
 02/08/2020   11:54:40   (  70.43,  -1.82) 02/08/2020   11:54:59  (  70.42,  -1.87)    2.68                19
 02/08/2020   12:45:21   ( -70.31, 165.69) 02/08/2020   12:44:29  ( -70.31, 165.62)    2.97                52