Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 4 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/20/2020   22:21:14   (   0.16,-128.04) (  -0.81,-132.38)  495.46                80
 04/21/2020   21:59:39   (   0.17,-128.06) (   0.24,-127.81)   28.79                80
 04/24/2020   10:04:53   (  -0.16,-128.12) (  -0.10,-128.43)   35.02                80
 04/25/2020   09:43:18   (  -0.18,-128.14) (  -1.16,-123.86)  488.26                80
 04/26/2020   22:07:35   (   0.15,-128.16) (  -0.08,-129.07)  104.71                80
 04/27/2020   21:46:00   (   0.16,-128.18) (   0.97,-124.50)  418.55                80
 04/29/2020   10:10:10   (  -0.13,-128.20) (   0.21,-129.69)  170.17                80
 04/30/2020   09:48:35   (  -0.15,-128.21) (  -0.84,-125.12)  352.28                80
 05/01/2020   22:12:53   (   0.12,-128.21) (  -0.34,-130.35)  242.36                80
 05/02/2020   21:51:16   (   0.13,-128.22) (   0.66,-125.76)  280.27                80