Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 20.  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   10:29:51   (  -0.00,-137.00) (  -0.02,-136.95)    5.24                80
 12/24/2023   22:33:01   (  -0.02,-136.97) (  -0.19,-137.71)   84.91                80
 12/25/2023   22:16:57   (  -0.02,-136.96) (   0.83,-133.19)  430.51                80
 12/27/2023   10:38:44   (   0.02,-136.95) (   0.37,-138.45)  170.85                80
 12/28/2023   10:17:20   (   0.01,-136.94) (  -0.66,-133.92)  344.20                80
 12/29/2023   22:41:56   (  -0.01,-136.91) (  -0.51,-139.22)  263.24                80
 12/30/2023   22:20:31   (   0.00,-136.90) (   0.47,-134.68)  251.69                80
 01/01/2024   10:44:59   (  -0.00,-136.88) (   0.67,-139.96)  350.11                80
 01/02/2024   10:23:33   (  -0.01,-136.87) (  -0.31,-135.42)  164.69                80