Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 4 18.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2020   23:50:07   ( -69.43,   0.87) 04/19/2020   23:51:17  ( -69.30,   2.06)   48.71                70
 04/20/2020   00:40:41   (  68.80, 169.06) 04/20/2020   00:40:51  (  68.81, 169.06)    1.17                10
 04/20/2020   01:31:22   ( -68.68, -23.46) 04/20/2020   01:30:21  ( -68.70, -23.44)    2.01                61
 04/22/2020   16:06:33   ( -69.53, 116.62) 04/22/2020   16:07:42  ( -69.40, 118.08)   58.81                69
 04/22/2020   16:57:05   (  68.79, -75.03) 04/22/2020   16:57:18  (  68.79, -75.06)    1.13                13
 04/22/2020   17:47:46   ( -68.68,  92.44) 04/22/2020   17:46:48  ( -68.69,  92.44)    0.77                58
 04/25/2020   08:22:58   ( -69.59,-127.55) 04/25/2020   08:24:07  ( -69.50,-125.90)   64.90                69
 04/25/2020   09:13:29   (  68.80,  40.87) 04/25/2020   09:13:45  (  68.77,  40.81)    3.63                16
 04/25/2020   10:04:10   ( -68.68,-151.65) 04/25/2020   10:03:15  ( -68.67,-151.69)    2.07                55
 04/28/2020   00:39:23   ( -69.70, -11.80) 04/28/2020   00:40:31  ( -69.58,  -9.89)   74.93                68
 04/28/2020   01:29:52   (  68.80, 156.78) 04/28/2020   01:30:10  (  68.80, 156.73)    1.85                18
 04/28/2020   02:20:33   ( -68.68, -35.75) 04/28/2020   02:19:40  ( -68.70, -35.76)    1.70                53
 04/30/2020   16:55:48   ( -69.76, 104.02) 04/30/2020   16:56:56  ( -69.66, 106.10)   81.03                68
 04/30/2020   17:46:16   (  68.80, -87.32) 04/30/2020   17:46:36  (  68.82, -87.35)    2.43                20
 04/30/2020   18:36:57   ( -68.69,  80.15) 04/30/2020   18:36:06  ( -68.72,  80.16)    3.50                51