Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 3 20.  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   08:17:11   (  70.59,  52.37) 03/22/2020   08:18:23  (  70.57,  52.38)    2.11                72
 03/22/2020   09:07:53   ( -70.49,-140.15) 03/22/2020   09:07:53  ( -70.46,-140.15)    3.26                 0
 03/22/2020   09:58:34   (  70.27,  27.51) 03/22/2020   09:57:21  (  70.30,  27.26)    9.75                73
 03/25/2020   00:33:38   (  70.74, 168.04) 03/25/2020   00:34:49  (  70.66, 168.40)   15.49                71
 03/25/2020   01:24:17   ( -70.48, -24.22) 03/25/2020   01:24:20  ( -70.50, -24.21)    2.80                 3
 03/25/2020   02:15:00   (  70.36, 143.27) 03/25/2020   02:13:47  (  70.39, 143.27)    3.09                73
 03/27/2020   16:50:04   (  70.83, -76.21) 03/27/2020   16:51:15  (  70.75, -75.59)   24.39                71
 03/27/2020   17:40:41   ( -70.46,  91.70) 03/27/2020   17:40:48  ( -70.48,  91.64)    3.11                 7
 03/27/2020   18:31:24   (  70.35,-100.81) 03/27/2020   18:30:15  (  70.37,-100.88)    3.14                69
 03/30/2020   09:06:30   (  70.93,  39.53) 03/30/2020   09:07:41  (  70.84,  40.42)   33.85                71
 03/30/2020   09:57:06   ( -70.51,-152.46) 03/30/2020   09:57:15  ( -70.52,-152.43)    1.79                 9
 03/30/2020   10:47:48   (  70.40,  15.02) 03/30/2020   10:46:41  (  70.40,  15.05)    0.99                67
 04/02/2020   01:22:56   (  71.08, 155.18) 04/02/2020   01:24:05  (  70.98, 156.52)   49.46                69
 04/02/2020   02:13:29   ( -70.50, -36.55) 04/02/2020   02:13:42  ( -70.50, -36.58)    1.34                13
 04/02/2020   03:04:12   (  70.39, 130.94) 04/02/2020   03:03:09  (  70.38, 130.89)    2.43                63