Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 19.  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)
 12/20/2022   22:46:43   (  -0.00,-136.93) (  -0.82,-140.52)  409.78                80
 12/21/2022   22:28:24   (  -0.00,-136.93) (   0.33,-135.45)  168.41                80
 12/23/2022   10:46:42   (   0.01,-136.94) (   0.68,-139.87)  334.52                80
 12/24/2022   10:23:03   (   0.02,-136.93) (  -0.48,-134.80)  243.10                80
 12/25/2022   22:41:37   (  -0.02,-136.91) (  -0.53,-139.29)  271.27                80
 12/26/2022   22:23:18   (  -0.02,-136.90) (   0.57,-134.21)  306.18                80
 12/28/2022   10:41:35   (   0.02,-136.90) (   0.39,-138.63)  197.12                80
 12/29/2022   10:17:56   (   0.02,-136.89) (  -0.72,-133.56)  380.16                80
 12/30/2022   22:36:30   (  -0.02,-136.86) (  -0.29,-138.04)  134.63                80
 12/31/2022   22:18:11   (  -0.02,-136.85) (   0.82,-132.97)  442.60                80
 01/02/2023   10:36:27   (   0.03,-136.85) (   0.17,-137.38)   61.08                80