Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 4 10.  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)
 04/10/2019   21:16:17   (  68.88,-139.84) 04/10/2019   21:17:00  (  68.90,-139.82)    2.26                43
 04/10/2019   22:06:58   ( -68.76,  27.64) 04/10/2019   22:06:30  ( -68.78,  27.68)    3.35                28
 04/13/2019   13:32:45   (  68.88, -23.97) 04/13/2019   13:33:29  (  68.89, -23.95)    1.13                44
 04/13/2019   14:23:26   ( -68.76, 143.51) 04/13/2019   14:22:59  ( -68.78, 143.55)    2.40                27
 04/16/2019   05:49:12   (  68.89,  91.90) 04/16/2019   05:49:57  (  68.88,  91.92)    1.54                45
 04/16/2019   06:39:53   ( -68.77,-100.62) 04/16/2019   06:39:27  ( -68.77,-100.58)    1.64                26
 04/18/2019   22:05:39   (  68.84,-152.16) 04/18/2019   22:06:26  (  68.87,-152.22)    3.34                47
 04/18/2019   22:56:21   ( -68.78,  15.25) 04/18/2019   22:55:56  ( -68.76,  15.29)    2.44                25
 04/18/2019   23:46:46   (  67.65,-176.00) 04/18/2019   23:45:40  (  67.70,-178.34)   98.76                66
 04/21/2019   14:22:07   (  68.85, -36.29) 04/21/2019   14:22:55  (  68.85, -36.35)    2.46                48
 04/21/2019   15:12:48   ( -68.73, 131.19) 04/21/2019   15:12:25  ( -68.75, 131.15)    2.19                23
 04/21/2019   16:03:15   (  67.71, -60.20) 04/21/2019   16:02:08  (  67.74, -62.41)   93.21                67
 04/24/2019   06:38:35   (  68.86,  79.57) 04/24/2019   06:39:23  (  68.89,  79.57)    3.15                48
 04/24/2019   07:29:16   ( -68.74,-112.95) 04/24/2019   07:28:54  ( -68.73,-112.99)    1.99                22
 04/24/2019   08:19:43   (  67.72,  55.67) 04/24/2019   08:18:36  (  67.78,  53.51)   90.85                67