Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 28.  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)
 01/28/2023   22:24:11   (   0.01,-137.00) (   0.59,-134.56)  278.15                80
 01/30/2023   10:45:57   (  -0.02,-137.01) (   0.60,-139.83)  321.32                80
 01/31/2023   10:24:31   (  -0.02,-137.01) (  -0.41,-135.30)  195.38                80
 02/01/2023   22:46:27   (   0.03,-137.01) (  -0.76,-140.61)  409.52                80
 02/02/2023   22:30:21   (   0.03,-137.01) (   0.26,-136.07)  106.88                80
 02/04/2023   10:52:08   (  -0.03,-137.01) (   0.92,-141.34)  493.62                80
 02/05/2023   10:33:22   (  -0.03,-137.00) (  -0.10,-136.81)   22.75                80
 02/07/2023   22:33:51   (   0.03,-136.99) (  -0.08,-137.58)   66.94                80
 02/08/2023   22:17:44   (   0.03,-136.98) (   0.89,-133.03)  449.03                80
 02/10/2023   10:36:51   (  -0.03,-136.97) (   0.28,-138.30)  152.22                80