Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 15.  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)
 03/16/2023   22:39:57   (   0.01,-137.00) (  -0.45,-139.14)  242.95                80
 03/17/2023   22:23:52   (   0.01,-137.00) (   0.56,-134.61)  273.14                80
 03/19/2023   10:45:38   (  -0.01,-136.99) (   0.62,-139.87)  327.93                80
 03/20/2023   10:24:13   (  -0.01,-136.99) (  -0.40,-135.34)  188.12                80
 03/21/2023   22:46:07   (   0.01,-136.98) (  -0.82,-140.63)  417.30                80
 03/22/2023   22:30:01   (   0.01,-136.97) (   0.20,-136.10)   98.71                80
 03/25/2023   10:33:02   (  -0.01,-136.95) (  -0.06,-136.84)   13.23                80
 03/27/2023   22:33:30   (   0.02,-136.91) (  -0.16,-137.60)   78.57                80
 03/28/2023   22:17:25   (   0.02,-136.90) (   0.88,-133.07)  436.46                80