Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 28.  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)
 06/28/2023   10:48:20   (  -0.01,-137.02) (   0.97,-141.33)  491.24                80
 06/29/2023   10:29:36   (  -0.02,-137.02) (  -0.09,-136.80)   24.81                80
 07/01/2023   22:32:46   (   0.02,-136.99) (  -0.12,-137.57)   65.84                80
 07/02/2023   22:16:40   (   0.02,-136.98) (   0.87,-133.03)  449.55                80
 07/04/2023   10:35:47   (  -0.02,-136.97) (   0.27,-138.31)  152.08                80
 07/05/2023   10:19:42   (  -0.01,-136.95) (  -0.73,-133.77)  362.98                80
 07/06/2023   22:38:57   (   0.01,-136.92) (  -0.46,-139.07)  244.57                80
 07/07/2023   22:22:52   (  -0.00,-136.91) (   0.54,-134.54)  270.58                80
 07/09/2023   10:41:58   (   0.00,-136.89) (   0.65,-139.80)  331.33                80
 07/10/2023   10:25:53   (   0.01,-136.87) (  -0.35,-135.26)  183.48                80
 07/11/2023   22:45:08   (  -0.00,-136.84) (  -0.82,-140.57)  425.00                80