Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 22.  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)
 12/22/2023   10:29:50   (   0.00,-137.00) (   0.00,-136.95)    5.45                80
 12/24/2023   22:33:02   (   0.00,-136.97) (  -0.16,-137.72)   85.43                80
 12/25/2023   22:16:57   (   0.00,-136.96) (   0.87,-133.19)  430.03                80
 12/27/2023   10:38:45   (   0.00,-136.95) (   0.34,-138.45)  171.24                80
 12/28/2023   10:17:20   (   0.00,-136.94) (  -0.70,-133.93)  343.99                80
 12/29/2023   22:39:16   (  -0.01,-136.91) (  -0.53,-139.22)  263.22                80
 12/30/2023   22:23:11   (  -0.01,-136.90) (   0.51,-134.69)  251.96                80
 01/01/2024   10:44:58   (   0.01,-136.88) (   0.68,-139.95)  349.67                80
 01/02/2024   10:23:33   (   0.01,-136.87) (  -0.30,-135.41)  165.25                80
 01/03/2024   22:45:28   (  -0.01,-136.83) (  -0.91,-140.71)  442.64                80
 01/04/2024   22:29:24   (  -0.01,-136.81) (   0.13,-136.18)   71.99                80