Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 3 21.  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)
 03/22/2020   08:17:12   (  70.63,  52.32) 03/22/2020   08:18:23  (  70.59,  52.41)    5.32                71
 03/22/2020   09:07:53   ( -70.47,-140.12) 03/22/2020   09:07:53  ( -70.48,-140.12)    0.36                 0
 03/22/2020   09:58:34   (  70.25,  27.54) 03/22/2020   09:57:21  (  70.32,  27.29)   11.81                73
 03/25/2020   00:33:38   (  70.72, 168.07) 03/25/2020   00:34:49  (  70.67, 168.42)   13.57                71
 03/25/2020   01:24:18   ( -70.51, -24.28) 03/25/2020   01:24:20  ( -70.51, -24.19)    3.04                 2
 03/25/2020   02:15:00   (  70.34, 143.30) 03/25/2020   02:13:48  (  70.35, 143.21)    3.27                72
 03/27/2020   16:50:03   (  70.81, -76.18) 03/27/2020   16:51:15  (  70.70, -75.66)   22.50                72
 03/27/2020   17:40:41   ( -70.50,  91.65) 03/27/2020   17:40:47  ( -70.49,  91.65)    1.28                 6
 03/27/2020   18:31:24   (  70.39,-100.86) 03/27/2020   18:30:14  (  70.37,-100.87)    1.44                70
 03/30/2020   09:06:29   (  70.91,  39.57) 03/30/2020   09:07:40  (  70.83,  40.42)   32.06                71
 03/30/2020   09:57:05   ( -70.49,-152.43) 03/30/2020   09:57:14  ( -70.51,-152.43)    2.66                 9
 03/30/2020   10:47:48   (  70.38,  15.06) 03/30/2020   10:46:41  (  70.40,  15.04)    2.12                67
 04/02/2020   01:22:56   (  71.06, 155.22) 04/02/2020   01:24:06  (  70.90, 156.41)   46.34                70
 04/02/2020   02:13:30   ( -70.53, -36.60) 04/02/2020   02:13:41  ( -70.53, -36.52)    2.86                11
 04/02/2020   03:04:13   (  70.42, 130.89) 04/02/2020   03:03:08  (  70.41, 130.95)    2.51                65