Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2020   22:00:52   (  -0.02,-127.73) (  -0.04,-127.91)   20.89                80
 06/21/2020   10:06:06   (   0.02,-127.86) (   0.14,-128.53)   75.65                80
 06/22/2020   09:44:29   (   0.01,-127.89) (  -0.86,-123.95)  449.29                80
 06/23/2020   22:08:48   (  -0.02,-127.89) (  -0.29,-129.18)  147.10                80
 06/24/2020   21:47:12   (  -0.01,-127.92) (   0.72,-124.60)  377.91                80
 06/26/2020   10:11:22   (   0.03,-128.01) (   0.40,-129.80)  203.21                80
 06/27/2020   09:49:46   (   0.02,-128.04) (  -0.61,-125.22)  321.33                80
 06/28/2020   22:14:04   (  -0.03,-128.02) (  -0.59,-130.44)  276.10                80
 06/29/2020   21:52:29   (  -0.02,-128.04) (   0.48,-125.87)  248.46                80
 07/01/2020   10:16:38   (   0.03,-128.14) (   0.70,-131.05)  333.26                80