Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 3 15.  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)
 03/16/2020   23:44:23   (  70.56,-179.38) 03/16/2020   23:45:29  (  70.57,-179.38)    1.38                66
 03/17/2020   00:35:04   ( -70.46, -11.91) 03/17/2020   00:34:58  ( -70.46, -11.91)    0.12                 6
 03/17/2020   01:25:41   (  70.03, 156.08) 03/17/2020   01:24:30  (  70.08, 155.19)   34.26                71
 03/19/2020   16:00:46   (  70.54, -63.45) 03/19/2020   16:01:56  (  70.55, -63.52)    3.10                70
 03/19/2020   16:51:28   ( -70.44, 104.03) 03/19/2020   16:51:26  ( -70.44, 103.95)    3.17                 2
 03/19/2020   17:42:08   (  70.17, -88.23) 03/19/2020   17:40:55  (  70.23, -88.72)   19.65                73
 03/22/2020   08:17:12   (  70.63,  52.31) 03/22/2020   08:18:23  (  70.59,  52.41)    5.69                71
 03/22/2020   09:07:53   ( -70.47,-140.11) 03/22/2020   09:07:53  ( -70.48,-140.11)    1.45                 0
 03/22/2020   09:58:34   (  70.25,  27.54) 03/22/2020   09:57:21  (  70.31,  27.29)   11.55                73
 03/25/2020   00:33:38   (  70.71, 168.07) 03/25/2020   00:34:49  (  70.67, 168.41)   13.47                71
 03/25/2020   01:24:18   ( -70.50, -24.26) 03/25/2020   01:24:20  ( -70.51, -24.19)    3.21                 2
 03/25/2020   02:15:00   (  70.34, 143.30) 03/25/2020   02:13:48  (  70.34, 143.21)    3.47                72
 03/27/2020   16:50:03   (  70.80, -76.17) 03/27/2020   16:51:15  (  70.69, -75.67)   22.09                72
 03/27/2020   17:40:41   ( -70.49,  91.67) 03/27/2020   17:40:47  ( -70.49,  91.66)    0.45                 6
 03/27/2020   18:31:24   (  70.38,-100.85) 03/27/2020   18:30:14  (  70.37,-100.87)    1.49                70