Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 3 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/10/2020   21:57:52   (   0.34,-128.39) (   0.71,-126.86)  174.88                80
 03/12/2020   10:19:21   (  -0.33,-128.35) (   0.53,-132.04)  421.67                80
 03/13/2020   09:57:46   (  -0.33,-128.34) (  -0.51,-127.47)   98.40                80
 03/14/2020   22:19:25   (   0.32,-128.34) (  -0.65,-132.70)  497.66                80
 03/15/2020   22:00:30   (   0.33,-128.32) (   0.40,-128.13)   22.61                80
 03/18/2020   10:05:44   (  -0.31,-128.26) (  -0.20,-128.74)   54.96                80
 03/19/2020   09:44:08   (  -0.32,-128.24) (  -1.24,-124.16)  464.47                80
 03/20/2020   22:05:46   (   0.30,-128.23) (   0.03,-129.39)  132.31                80
 03/21/2020   21:49:31   (   0.31,-128.21) (   1.08,-124.81)  387.38                80
 03/23/2020   10:11:01   (  -0.29,-128.16) (   0.11,-130.00)  209.79                80