Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2023 1 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/08/2023   22:31:52   (  -0.00,-127.92) (  -0.04,-128.10)   21.35                80
 01/09/2023   22:10:53   (  -0.01,-127.94) (   0.96,-123.67)  487.04                80
 01/11/2023   10:33:18   (   0.00,-128.03) (   0.26,-129.07)  118.44                80
 01/12/2023   10:17:38   (   0.01,-128.05) (  -0.74,-124.63)  390.03                80
 01/13/2023   22:40:14   (  -0.00,-128.02) (  -0.44,-130.08)  233.28                80
 01/14/2023   22:19:13   (  -0.00,-128.04) (   0.51,-125.63)  274.67                80
 01/16/2023   10:41:40   (   0.00,-128.12) (   0.66,-131.04)  332.21                80
 01/17/2023   10:26:00   (   0.00,-128.14) (  -0.36,-126.60)  175.47                80
 01/18/2023   22:48:34   (  -0.01,-128.10) (  -0.87,-132.04)  448.62                80
 01/19/2023   22:27:34   (  -0.01,-128.10) (   0.09,-127.59)   58.21                80