Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 11.  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)
 12/11/2022   22:35:52   (   0.00,-136.91) (  -0.25,-137.90)  113.90                80
 12/12/2022   22:17:34   (   0.00,-136.90) (   0.94,-132.84)  463.45                80
 12/14/2022   10:35:54   (   0.00,-136.91) (   0.08,-137.27)   40.76                80
 12/16/2022   22:33:28   (  -0.00,-136.86) (   0.03,-136.68)   21.01                80
 12/18/2022   10:51:48   (   0.00,-136.87) (   0.92,-141.11)  483.13                80
 12/19/2022   10:28:08   (   0.00,-136.85) (  -0.17,-136.03)   93.20                80
 12/20/2022   22:46:43   (  -0.00,-136.80) (  -0.83,-140.52)  424.05                80
 12/21/2022   22:28:24   (  -0.00,-136.78) (   0.32,-135.45)  151.82                80
 12/23/2022   10:46:41   (   0.00,-136.76) (   0.69,-139.87)  353.58                80
 12/24/2022   10:23:02   (   0.01,-136.74) (  -0.41,-134.79)  221.62                80