Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 3 22.  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   (  70.62,  52.33) 03/22/2020   08:18:23  (  70.60,  52.42)    4.16                71
 03/22/2020   09:07:53   ( -70.47,-140.11) 03/22/2020   09:07:53  ( -70.48,-140.12)    1.62                 0
 03/22/2020   09:58:34   (  70.24,  27.55) 03/22/2020   09:57:22  (  70.27,  27.22)   12.76                72
 03/25/2020   00:33:38   (  70.71, 168.09) 03/25/2020   00:34:50  (  70.63, 168.35)   12.87                72
 03/25/2020   01:24:18   ( -70.50, -24.26) 03/25/2020   01:24:20  ( -70.52, -24.18)    3.58                 2
 03/25/2020   02:15:01   (  70.39, 143.23) 03/25/2020   02:13:48  (  70.36, 143.23)    3.19                73
 03/27/2020   16:50:04   (  70.85, -76.24) 03/27/2020   16:51:14  (  70.77, -75.56)   26.51                70
 03/27/2020   17:40:41   ( -70.48,  91.67) 03/27/2020   17:40:47  ( -70.50,  91.67)    1.76                 6
 03/27/2020   18:31:24   (  70.37,-100.84) 03/27/2020   18:30:14  (  70.39,-100.85)    2.02                70
 03/30/2020   09:06:30   (  70.94,  39.51) 03/30/2020   09:07:41  (  70.80,  40.37)   34.92                71
 03/30/2020   09:57:05   ( -70.47,-152.40) 03/30/2020   09:57:15  ( -70.48,-152.48)    3.09                10
 03/30/2020   10:47:49   (  70.41,  15.00) 03/30/2020   10:46:41  (  70.42,  15.08)    2.96                68
 04/02/2020   01:22:56   (  71.03, 155.26) 04/02/2020   01:24:06  (  70.94, 156.46)   44.79                70
 04/02/2020   02:13:30   ( -70.51, -36.56) 04/02/2020   02:13:42  ( -70.51, -36.56)    0.27                12
 04/02/2020   03:04:13   (  70.40, 130.93) 04/02/2020   03:03:09  (  70.39, 130.92)    0.70                64
 04/04/2020   17:39:23   (  71.18, -89.09) 04/04/2020   17:40:31  (  71.07, -87.45)   60.08                68
 04/04/2020   18:29:54   ( -70.50,  79.36) 04/04/2020   18:30:10  ( -70.49,  79.29)    3.12                16
 04/04/2020   19:20:37   (  70.39,-113.15) 04/04/2020   19:19:36  (  70.42,-113.16)    3.51                61