Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/16/2021   10:23:17   (  -0.04,-127.70) (   0.52,-130.21)  285.70                80
 12/17/2021   10:07:34   (  -0.02,-127.66) (  -0.48,-125.76)  216.99                80
 12/18/2021   22:27:25   (   0.04,-127.60) (  -0.78,-131.19)  409.09                80
 12/19/2021   22:11:42   (   0.03,-127.56) (   0.22,-126.74)   93.37                80
 12/22/2021   10:13:00   (  -0.03,-127.44) (   0.05,-127.67)   27.57                80
 12/23/2021   09:57:17   (  -0.03,-127.39) (  -0.95,-123.23)  474.39                80
 12/24/2021   22:17:09   (   0.05,-127.32) (  -0.23,-128.66)  152.84                80
 12/25/2021   22:01:25   (   0.04,-127.27) (   0.71,-124.20)  349.01                80
 12/27/2021   10:21:07   (  -0.05,-127.19) (   0.50,-129.60)  274.38                80
 12/28/2021   10:05:24   (  -0.05,-127.14) (  -0.49,-125.15)  226.96                80