Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 25.  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)
 03/27/2023   22:33:30   (   0.00,-136.98) (  -0.15,-137.59)   70.94                80
 03/28/2023   22:17:25   (   0.00,-136.97) (   0.88,-133.07)  444.92                80
 03/30/2023   10:36:30   (  -0.00,-136.96) (   0.32,-138.32)  156.07                80
 03/31/2023   10:20:25   (   0.00,-136.95) (  -0.72,-133.80)  359.57                80
 04/01/2023   22:39:38   (  -0.01,-136.92) (  -0.51,-139.08)  247.24                80
 04/02/2023   22:23:31   (  -0.02,-136.90) (   0.48,-134.54)  268.45                80
 04/04/2023   10:45:18   (   0.00,-136.89) (   0.65,-139.82)  333.58                80
 04/05/2023   10:23:51   (  -0.01,-136.87) (  -0.34,-135.28)  181.30                80
 04/06/2023   22:45:46   (   0.02,-136.83) (  -0.81,-140.58)  426.68                80
 04/07/2023   22:29:39   (   0.02,-136.81) (   0.19,-136.04)   87.82                80