Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 16.  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)
 04/16/2023   10:19:59   (  -0.00,-136.99) (  -0.72,-133.72)  372.88                80
 04/17/2023   22:39:13   (   0.00,-136.98) (  -0.42,-139.02)  231.93                80
 04/18/2023   22:23:06   (   0.00,-136.98) (   0.53,-134.47)  284.78                80
 04/20/2023   10:42:11   (  -0.00,-136.98) (   0.62,-139.74)  315.12                80
 04/21/2023   10:26:04   (   0.00,-136.97) (  -0.40,-135.20)  201.15                80
 04/22/2023   22:45:18   (  -0.00,-136.94) (  -0.78,-140.50)  404.69                80
 04/23/2023   22:29:11   (   0.00,-136.93) (   0.25,-135.96)  111.18                80
 04/25/2023   10:50:56   (  -0.00,-136.92) (   0.95,-141.22)  489.96                80
 04/26/2023   10:29:29   (  -0.01,-136.90) (  -0.08,-136.68)   25.63                80
 04/28/2023   22:32:35   (   0.01,-136.85) (  -0.11,-137.43)   66.07                80
 04/29/2023   22:16:28   (   0.01,-136.83) (   0.87,-132.89)  449.23                80