Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 5 20.  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)
 05/20/2025   22:15:29   (  -0.00,-137.01) (   0.88,-133.08)  448.61                80
 05/22/2025   10:39:59   (  -0.00,-137.01) (   0.31,-138.35)  152.39                80
 05/23/2025   10:18:35   (  -0.00,-137.02) (  -0.71,-133.82)  363.99                80
 05/24/2025   22:40:32   (   0.00,-137.03) (  -0.48,-139.13)  240.29                80
 05/25/2025   22:24:29   (   0.01,-137.02) (   0.55,-134.61)  275.45                80
 05/27/2025   10:46:18   (  -0.01,-137.01) (   0.64,-139.88)  327.28                80
 05/28/2025   10:27:35   (  -0.02,-137.01) (  -0.39,-135.36)  187.90                80
 05/29/2025   22:46:52   (   0.02,-137.00) (  -0.80,-140.67)  417.98                80
 05/30/2025   22:30:49   (   0.02,-136.99) (   0.24,-136.14)   97.21                80
 06/02/2025   10:33:53   (  -0.02,-136.97) (  -0.04,-136.89)    9.20                80