Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 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)
 12/25/2022   10:18:29   (  -0.00,-136.93) (  -0.72,-133.73)  365.17                80
 12/26/2022   22:40:26   (   0.00,-136.91) (  -0.48,-139.03)  242.31                80
 12/27/2022   22:24:21   (  -0.00,-136.90) (   0.54,-134.51)  273.24                80
 12/29/2022   10:46:09   (   0.00,-136.91) (   0.67,-139.78)  327.33                80
 12/30/2022   10:24:44   (   0.00,-136.90) (  -0.36,-135.25)  187.99                80
 12/31/2022   22:46:40   (  -0.00,-136.87) (  -0.83,-140.56)  420.14                80
 01/01/2023   22:30:36   (   0.00,-136.86) (   0.19,-136.03)   94.89                80
 01/04/2023   10:30:59   (  -0.00,-136.84) (  -0.01,-136.77)    7.94                80
 01/06/2023   22:34:11   (   0.01,-136.79) (  -0.14,-137.56)   87.43                80
 01/07/2023   22:18:05   (   0.00,-136.77) (   0.83,-133.02)  426.81                80