Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 3 18.  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)
 03/19/2020   16:00:46   (  70.54, -63.45) 03/19/2020   16:01:56  (  70.55, -63.53)    3.07                70
 03/19/2020   16:51:29   ( -70.49, 103.94) 03/19/2020   16:51:25  ( -70.49, 104.01)    2.69                 4
 03/19/2020   17:42:08   (  70.17, -88.23) 03/19/2020   17:40:55  (  70.22, -88.73)   19.66                73
 03/22/2020   08:17:12   (  70.62,  52.31) 03/22/2020   08:18:23  (  70.58,  52.40)    5.62                71
 03/22/2020   09:07:53   ( -70.47,-140.12) 03/22/2020   09:07:53  ( -70.47,-140.13)    0.59                 0
 03/22/2020   09:58:34   (  70.25,  27.54) 03/22/2020   09:57:21  (  70.31,  27.28)   11.73                73
 03/25/2020   00:33:38   (  70.71, 168.08) 03/25/2020   00:34:49  (  70.67, 168.41)   12.94                71
 03/25/2020   01:24:18   ( -70.50, -24.26) 03/25/2020   01:24:20  ( -70.51, -24.20)    2.77                 2
 03/25/2020   02:15:00   (  70.34, 143.31) 03/25/2020   02:13:48  (  70.35, 143.21)    3.83                72
 03/27/2020   16:50:04   (  70.80, -76.16) 03/27/2020   16:51:16  (  70.70, -75.66)   20.90                72
 03/27/2020   17:40:42   ( -70.48,  91.67) 03/27/2020   17:40:48  ( -70.49,  91.66)    1.51                 6
 03/27/2020   18:31:25   (  70.37,-100.84) 03/27/2020   18:30:15  (  70.38,-100.87)    1.16                70
 03/30/2020   09:06:30   (  70.93,  39.52) 03/30/2020   09:07:41  (  70.79,  40.35)   34.40                71
 03/30/2020   09:57:06   ( -70.51,-152.47) 03/30/2020   09:57:14  ( -70.52,-152.42)    2.55                 8
 03/30/2020   10:47:49   (  70.41,  15.01) 03/30/2020   10:46:41  (  70.41,  15.06)    1.84                68