Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 3 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)
 03/21/2025   22:40:42   (   0.02,-137.00) (  -0.46,-139.14)  244.04                80
 03/22/2025   22:24:36   (   0.01,-136.99) (   0.54,-134.60)  271.97                80
 03/24/2025   10:46:22   (   0.01,-136.96) (   0.68,-139.86)  330.31                80
 03/25/2025   10:24:56   (   0.01,-136.95) (  -0.33,-135.32)  185.08                80
 03/26/2025   22:46:53   (  -0.01,-136.95) (  -0.81,-140.64)  420.02                80
 03/27/2025   22:30:47   (  -0.00,-136.93) (   0.21,-136.10)   95.33                80
 03/30/2025   10:31:07   (  -0.00,-136.88) (  -0.02,-136.83)    6.70                80
 04/01/2025   22:34:16   (   0.02,-136.84) (  -0.16,-137.59)   85.35                80
 04/02/2025   22:18:10   (   0.02,-136.82) (   0.88,-133.06)  428.81                80