Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 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)
 12/18/2022   10:51:48   (   0.00,-136.93) (   0.91,-141.11)  475.73                80
 12/19/2022   10:28:08   (   0.00,-136.93) (  -0.18,-136.03)  101.80                80
 12/20/2022   22:46:43   (   0.00,-136.90) (  -0.82,-140.52)  412.90                80
 12/21/2022   22:28:24   (   0.01,-136.89) (   0.33,-135.45)  163.98                80
 12/23/2022   10:46:43   (  -0.02,-136.89) (   0.62,-139.88)  340.72                80
 12/24/2022   10:23:03   (  -0.02,-136.87) (  -0.48,-134.80)  235.55                80
 12/25/2022   22:41:37   (   0.02,-136.83) (  -0.54,-139.29)  281.08                80
 12/26/2022   22:23:19   (   0.03,-136.81) (   0.63,-134.22)  295.22                80
 12/28/2022   10:41:35   (  -0.03,-136.80) (   0.39,-138.63)  209.56                80
 12/29/2022   10:17:56   (  -0.03,-136.78) (  -0.72,-133.56)  366.63                80
 12/30/2022   22:36:31   (   0.03,-136.73) (  -0.24,-138.06)  150.45                80
 12/31/2022   22:18:12   (   0.03,-136.71) (   0.88,-132.98)  425.68                80