Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 10/19/2023   10:31:29   (   0.00,-137.02) (  -0.07,-136.72)   34.26                80
 10/21/2023   22:34:38   (   0.00,-137.00) (  -0.13,-137.47)   55.04                80
 10/22/2023   22:13:12   (   0.01,-136.99) (   0.90,-132.94)  461.12                80
 10/24/2023   10:37:38   (  -0.02,-136.99) (   0.25,-138.21)  138.87                80
 10/25/2023   10:16:13   (  -0.02,-136.98) (  -0.79,-133.68)  377.14                80
 10/26/2023   22:38:06   (   0.01,-136.96) (  -0.47,-138.96)  228.55                80
 10/27/2023   22:22:00   (  -0.03,-136.95) (   0.51,-134.42)  288.25                80
 10/29/2023   10:43:46   (   0.03,-136.95) (   0.62,-139.69)  312.31                80
 10/30/2023   10:22:20   (   0.02,-136.93) (  -0.36,-135.15)  203.17                80
 10/31/2023   22:46:54   (  -0.03,-136.90) (  -0.81,-140.44)  403.93                80