Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 2 8.  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)
 02/08/2023   22:17:46   (   0.01,-137.00) (   0.93,-133.04)  451.49                80
 02/10/2023   10:36:51   (  -0.02,-137.00) (   0.30,-138.30)  148.47                80
 02/11/2023   10:20:45   (  -0.02,-137.00) (  -0.73,-133.77)  368.08                80
 02/12/2023   22:40:00   (   0.02,-136.99) (  -0.47,-139.06)  237.15                80
 02/13/2023   22:23:54   (   0.02,-136.98) (   0.56,-134.54)  278.79                80
 02/15/2023   10:43:00   (  -0.03,-136.97) (   0.59,-139.81)  322.97                80
 02/16/2023   10:26:54   (  -0.03,-136.96) (  -0.39,-135.27)  192.27                80
 02/17/2023   22:46:08   (   0.03,-136.93) (  -0.80,-140.56)  414.85                80
 02/18/2023   22:30:03   (   0.04,-136.91) (   0.25,-136.04)  100.17                80
 02/21/2023   10:33:03   (  -0.04,-136.87) (  -0.09,-136.77)   12.98                80